./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/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_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/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 32bit --witnessprinter.graph.data.programhash 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:22:09,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:22:09,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:22:09,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:22:09,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:22:09,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:22:09,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:22:09,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:22:09,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:22:09,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:22:09,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:22:09,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:22:09,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:22:09,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:22:09,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:22:09,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:22:09,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:22:09,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:22:09,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:22:09,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:22:09,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:22:09,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:22:09,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:22:09,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:22:09,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:22:09,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:22:09,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:22:09,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:22:09,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:22:09,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:22:09,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:22:09,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:22:09,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:22:09,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:22:09,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:22:09,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:22:09,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:22:09,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:22:09,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:22:09,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:22:09,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:22:09,533 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:22:09,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:22:09,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:22:09,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:22:09,559 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:22:09,560 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:22:09,560 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:22:09,560 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:22:09,560 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:22:09,560 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:22:09,560 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:22:09,562 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:22:09,562 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:22:09,562 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:22:09,562 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:22:09,562 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:22:09,563 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:22:09,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:22:09,564 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:22:09,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:22:09,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:22:09,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:22:09,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:22:09,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:22:09,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:22:09,565 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:22:09,565 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:22:09,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:22:09,566 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:22:09,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:22:09,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:22:09,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:22:09,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:09,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:22:09,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:22:09,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:22:09,569 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:22:09,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:22:09,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:22:09,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:22:09,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:22:09,570 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_a1bec362-c86c-4f3e-ba45-5163264694f7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 [2021-11-12 23:22:09,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:22:09,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:22:09,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:22:09,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:22:09,899 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:22:09,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-12 23:22:09,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/data/ffebe9d53/d43310185f0f4d12949b03ca2d381c84/FLAGce5494973 [2021-11-12 23:22:10,434 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:22:10,434 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-12 23:22:10,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/data/ffebe9d53/d43310185f0f4d12949b03ca2d381c84/FLAGce5494973 [2021-11-12 23:22:10,775 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/data/ffebe9d53/d43310185f0f4d12949b03ca2d381c84 [2021-11-12 23:22:10,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:22:10,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:22:10,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:10,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:22:10,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:22:10,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:10" (1/1) ... [2021-11-12 23:22:10,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e0a5c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:10, skipping insertion in model container [2021-11-12 23:22:10,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:10" (1/1) ... [2021-11-12 23:22:10,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:22:10,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:22:11,050 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_a1bec362-c86c-4f3e-ba45-5163264694f7/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-12 23:22:11,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:11,070 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 23:22:11,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@43422018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:11, skipping insertion in model container [2021-11-12 23:22:11,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:11,071 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:22:11,073 INFO L158 Benchmark]: Toolchain (without parser) took 292.47ms. Allocated memory is still 100.7MB. Free memory was 58.9MB in the beginning and 74.9MB in the end (delta: -16.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-12 23:22:11,074 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 100.7MB. Free memory was 75.4MB in the beginning and 75.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:22:11,075 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.48ms. Allocated memory is still 100.7MB. Free memory was 58.8MB in the beginning and 74.9MB in the end (delta: -16.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-12 23:22:11,077 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 100.7MB. Free memory was 75.4MB in the beginning and 75.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.48ms. Allocated memory is still 100.7MB. Free memory was 58.8MB in the beginning and 74.9MB in the end (delta: -16.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 151]: 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_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/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_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/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 32bit --witnessprinter.graph.data.programhash 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:22:13,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:22:13,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:22:13,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:22:13,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:22:13,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:22:13,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:22:13,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:22:13,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:22:13,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:22:13,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:22:13,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:22:13,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:22:13,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:22:13,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:22:13,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:22:13,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:22:13,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:22:13,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:22:13,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:22:13,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:22:13,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:22:13,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:22:13,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:22:13,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:22:13,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:22:13,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:22:13,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:22:13,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:22:13,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:22:13,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:22:13,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:22:13,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:22:13,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:22:13,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:22:13,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:22:13,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:22:13,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:22:13,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:22:13,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:22:13,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:22:13,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:22:13,756 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:22:13,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:22:13,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:22:13,758 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:22:13,759 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:22:13,759 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:22:13,759 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:22:13,759 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:22:13,760 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:22:13,760 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:22:13,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:22:13,763 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:22:13,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:22:13,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:22:13,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:22:13,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:22:13,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:22:13,764 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:22:13,765 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:22:13,765 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:22:13,765 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:22:13,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:22:13,766 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:22:13,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:22:13,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:22:13,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:22:13,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:22:13,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:13,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:22:13,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:22:13,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:22:13,768 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:22:13,769 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:22:13,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:22:13,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:22:13,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:22:13,770 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_a1bec362-c86c-4f3e-ba45-5163264694f7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 [2021-11-12 23:22:14,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:22:14,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:22:14,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:22:14,160 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:22:14,161 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:22:14,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-12 23:22:14,223 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/data/cebbc550c/f9736f8bd8a944dc85e3adbc06b58811/FLAG1ea51fd83 [2021-11-12 23:22:14,741 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:22:14,742 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2021-11-12 23:22:14,754 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/data/cebbc550c/f9736f8bd8a944dc85e3adbc06b58811/FLAG1ea51fd83 [2021-11-12 23:22:15,099 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/data/cebbc550c/f9736f8bd8a944dc85e3adbc06b58811 [2021-11-12 23:22:15,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:22:15,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:22:15,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:15,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:22:15,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:22:15,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79675b25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15, skipping insertion in model container [2021-11-12 23:22:15,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:22:15,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:22:15,410 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_a1bec362-c86c-4f3e-ba45-5163264694f7/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-12 23:22:15,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:15,473 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:22:15,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:22:15,531 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_a1bec362-c86c-4f3e-ba45-5163264694f7/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-12 23:22:15,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:15,542 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:22:15,580 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_a1bec362-c86c-4f3e-ba45-5163264694f7/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2021-11-12 23:22:15,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:15,602 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:22:15,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15 WrapperNode [2021-11-12 23:22:15,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:15,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:22:15,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:22:15,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:22:15,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:22:15,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:22:15,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:22:15,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:22:15,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:22:15,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:22:15,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:22:15,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:22:15,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15" (1/1) ... [2021-11-12 23:22:15,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:15,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:15,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:22:15,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:22:15,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:22:15,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:22:15,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:22:15,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-12 23:22:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-12 23:22:15,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-12 23:22:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-12 23:22:15,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-12 23:22:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-12 23:22:15,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:22:15,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:22:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:22:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:22:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:22:15,824 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-12 23:22:16,713 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:22:16,714 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-12 23:22:16,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:16 BoogieIcfgContainer [2021-11-12 23:22:16,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:22:16,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:22:16,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:22:16,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:22:16,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:22:15" (1/3) ... [2021-11-12 23:22:16,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67815955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:22:16, skipping insertion in model container [2021-11-12 23:22:16,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:15" (2/3) ... [2021-11-12 23:22:16,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67815955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:22:16, skipping insertion in model container [2021-11-12 23:22:16,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:16" (3/3) ... [2021-11-12 23:22:16,747 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2021-11-12 23:22:16,751 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-12 23:22:16,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:22:16,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:22:16,752 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-12 23:22:16,822 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,823 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,823 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,823 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,823 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,823 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,824 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,824 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,824 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,824 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,824 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,825 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,826 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,826 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,826 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,826 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,826 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,827 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,827 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,827 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,827 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,827 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,827 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,828 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,828 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,828 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,828 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,828 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,829 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,829 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,829 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,829 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,829 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,829 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,830 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,830 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,830 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,830 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,830 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,831 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,831 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,831 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,831 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,831 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,832 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,832 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,832 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,832 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,833 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,833 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,833 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,833 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,833 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,833 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,834 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,834 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,834 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,834 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,834 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,838 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,838 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,838 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,839 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,839 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,839 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,839 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,840 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,840 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,840 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,840 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,840 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,841 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,841 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,842 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,843 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,847 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,847 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,847 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,848 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,849 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,850 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,851 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,859 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,859 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,859 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,859 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,859 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,859 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,860 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,860 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,860 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,860 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,860 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,861 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,861 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,861 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,861 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,861 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,861 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,864 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,864 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,864 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,864 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,864 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,871 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,872 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,873 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,873 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,873 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,873 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,874 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,874 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,879 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,879 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,879 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,880 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,880 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,880 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,880 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,880 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,880 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,881 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,881 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,881 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,882 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,882 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,882 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,882 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,882 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,883 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,884 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,884 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,884 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,884 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,884 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,884 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,885 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,885 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,885 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,885 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,885 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,885 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,886 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,886 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,886 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,886 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,886 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,886 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,886 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,888 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,894 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,922 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,925 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,925 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,925 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,925 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,925 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,925 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,925 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,926 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,926 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,926 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,926 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,926 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,926 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,927 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,927 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,927 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,928 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,928 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,928 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,929 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,932 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,932 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,932 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,932 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,932 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,932 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,935 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,936 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,937 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,938 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,938 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,938 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,938 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,938 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,940 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,940 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,940 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,940 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,941 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,941 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,941 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,941 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,941 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,942 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,942 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,942 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,947 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,947 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,947 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,947 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,947 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,948 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,949 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,949 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,949 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,949 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,949 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,949 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,949 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,950 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,950 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,950 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,950 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,951 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,951 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,951 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,951 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,951 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,951 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite35#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,951 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite35#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,952 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,952 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,952 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,952 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,952 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,952 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,953 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite35#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,953 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite35#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,953 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,953 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,953 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,953 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,953 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite35#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,954 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite35#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,954 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,954 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,954 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,954 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,954 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,954 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,955 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret34#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,955 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret34#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,955 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,955 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,955 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,955 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,955 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,956 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,956 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,956 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,956 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,956 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,956 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,956 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,957 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,957 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,957 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,957 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,957 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,957 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,957 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,958 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,958 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,958 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,958 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,958 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,958 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,958 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,959 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,959 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,959 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,959 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,960 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,960 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,961 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,961 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,961 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,961 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,961 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,961 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,961 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,962 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,962 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,962 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,962 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,962 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,962 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,963 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,963 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,963 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,963 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,963 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,967 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,967 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,967 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,968 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,968 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,968 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,968 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,968 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,968 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,968 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,969 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,969 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,969 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,970 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,970 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,970 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,970 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,971 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,971 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,971 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,971 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,971 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,971 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,972 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret34#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret34#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,973 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,974 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,974 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret34#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,974 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite35#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,974 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret34#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,974 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite35#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,974 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,974 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,977 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite25#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,977 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post33#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,978 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,978 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,978 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet27#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,978 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,978 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite35#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,978 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret34#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,978 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite29#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,979 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite31#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,979 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,979 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,979 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem28#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,979 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite26#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,979 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,980 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,980 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite32#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,980 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,980 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ite30#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,980 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,987 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,987 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,987 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,987 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,987 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,987 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,988 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ret12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,988 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,988 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,988 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,988 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,988 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,988 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,989 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,989 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,989 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,989 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,989 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,989 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,989 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,993 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,993 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,993 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,993 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,993 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,993 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite21#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ret23#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite24#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,996 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~ite20#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:16,996 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post22#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:22:17,000 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-12 23:22:17,074 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:22:17,083 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 23:22:17,083 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-12 23:22:17,120 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-12 23:22:17,147 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 412 places, 446 transitions, 916 flow [2021-11-12 23:22:17,150 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 412 places, 446 transitions, 916 flow [2021-11-12 23:22:17,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 412 places, 446 transitions, 916 flow [2021-11-12 23:22:17,399 INFO L129 PetriNetUnfolder]: 44/443 cut-off events. [2021-11-12 23:22:17,399 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-12 23:22:17,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 443 events. 44/443 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1296 event pairs, 0 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 316. Up to 2 conditions per place. [2021-11-12 23:22:17,472 INFO L116 LiptonReduction]: Number of co-enabled transitions 65934 [2021-11-12 23:22:47,635 INFO L131 LiptonReduction]: Checked pairs total: 56997 [2021-11-12 23:22:47,635 INFO L133 LiptonReduction]: Total number of compositions: 544 [2021-11-12 23:22:47,646 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 28 transitions, 80 flow [2021-11-12 23:22:47,679 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:47,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 23:22:47,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:47,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:47,698 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:22:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash 501354084, now seen corresponding path program 1 times [2021-11-12 23:22:47,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:47,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243387817] [2021-11-12 23:22:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:47,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:47,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:47,727 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:47,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:22:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:22:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:48,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:48,150 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 23:22:48,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:48,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243387817] [2021-11-12 23:22:48,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243387817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:48,152 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:48,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-12 23:22:48,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561008002] [2021-11-12 23:22:48,154 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:48,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:22:48,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:22:48,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:22:48,209 INFO L87 Difference]: Start difference. First operand has 107 states, 106 states have (on average 3.0849056603773586) internal successors, (327), 106 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:48,430 INFO L93 Difference]: Finished difference Result 109 states and 329 transitions. [2021-11-12 23:22:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:22:48,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-12 23:22:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:48,445 INFO L225 Difference]: With dead ends: 109 [2021-11-12 23:22:48,445 INFO L226 Difference]: Without dead ends: 109 [2021-11-12 23:22:48,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 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 23:22:48,450 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.52ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 193.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:48,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 1.52ms Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 193.53ms Time] [2021-11-12 23:22:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-12 23:22:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-12 23:22:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 3.0462962962962963) internal successors, (329), 108 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 329 transitions. [2021-11-12 23:22:48,514 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 329 transitions. Word has length 20 [2021-11-12 23:22:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:48,515 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 329 transitions. [2021-11-12 23:22:48,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 329 transitions. [2021-11-12 23:22:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 23:22:48,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:48,523 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:48,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:48,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:48,739 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:22:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1422639108, now seen corresponding path program 1 times [2021-11-12 23:22:48,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:48,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289543380] [2021-11-12 23:22:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:48,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:48,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:48,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:48,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:22:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:48,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:22:48,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:49,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:49,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:49,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289543380] [2021-11-12 23:22:49,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289543380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:22:49,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [523780341] [2021-11-12 23:22:49,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:49,158 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:22:49,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:22:49,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:22:49,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-12 23:22:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:49,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:22:49,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:49,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:49,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [523780341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:22:49,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772643812] [2021-11-12 23:22:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:49,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:49,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:49,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:22:49,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:22:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:49,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:22:49,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:49,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:49,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772643812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:22:49,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:22:49,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-12 23:22:49,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414148304] [2021-11-12 23:22:49,799 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:22:49,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:22:49,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:22:49,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:22:49,802 INFO L87 Difference]: Start difference. First operand 109 states and 329 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:50,117 INFO L93 Difference]: Finished difference Result 110 states and 330 transitions. [2021-11-12 23:22:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:22:50,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 23:22:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:50,120 INFO L225 Difference]: With dead ends: 110 [2021-11-12 23:22:50,120 INFO L226 Difference]: Without dead ends: 110 [2021-11-12 23:22:50,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:22:50,122 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 245.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 302.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:50,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 302.68ms Time] [2021-11-12 23:22:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-12 23:22:50,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-12 23:22:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 3.0275229357798166) internal successors, (330), 109 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 330 transitions. [2021-11-12 23:22:50,136 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 330 transitions. Word has length 22 [2021-11-12 23:22:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:50,137 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 330 transitions. [2021-11-12 23:22:50,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:50,137 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 330 transitions. [2021-11-12 23:22:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-12 23:22:50,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:50,139 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:50,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 23:22:50,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-12 23:22:50,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:50,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:50,753 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:22:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:50,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1441128017, now seen corresponding path program 2 times [2021-11-12 23:22:50,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:50,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747061440] [2021-11-12 23:22:50,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:22:50,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:50,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:50,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:50,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:22:50,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 23:22:50,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:22:50,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:22:50,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:22:51,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:22:53,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:53,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747061440] [2021-11-12 23:22:53,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747061440] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:53,314 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:53,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:22:53,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848531375] [2021-11-12 23:22:53,315 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:53,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:22:53,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:53,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:22:53,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:22:53,316 INFO L87 Difference]: Start difference. First operand 110 states and 330 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:54,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:54,536 INFO L93 Difference]: Finished difference Result 183 states and 543 transitions. [2021-11-12 23:22:54,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:22:54,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-12 23:22:54,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:54,540 INFO L225 Difference]: With dead ends: 183 [2021-11-12 23:22:54,540 INFO L226 Difference]: Without dead ends: 172 [2021-11-12 23:22:54,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:22:54,542 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 809.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.73ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 908.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:54,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 262 Unknown, 0 Unchecked, 3.73ms Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 908.59ms Time] [2021-11-12 23:22:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-12 23:22:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 134. [2021-11-12 23:22:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.030075187969925) internal successors, (403), 133 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 403 transitions. [2021-11-12 23:22:54,560 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 403 transitions. Word has length 23 [2021-11-12 23:22:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:54,561 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 403 transitions. [2021-11-12 23:22:54,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 403 transitions. [2021-11-12 23:22:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-12 23:22:54,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:54,563 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:54,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:54,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:54,776 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:22:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:54,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1393800115, now seen corresponding path program 3 times [2021-11-12 23:22:54,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:54,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178103634] [2021-11-12 23:22:54,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:22:54,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:54,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:54,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:54,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:22:54,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-12 23:22:54,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:22:54,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:22:54,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:22:55,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:22:58,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:58,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178103634] [2021-11-12 23:22:58,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178103634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:58,429 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:58,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 23:22:58,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005236645] [2021-11-12 23:22:58,429 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:58,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:22:58,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:58,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:22:58,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:22:58,431 INFO L87 Difference]: Start difference. First operand 134 states and 403 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:59,771 INFO L93 Difference]: Finished difference Result 221 states and 653 transitions. [2021-11-12 23:22:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:22:59,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-12 23:22:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:59,774 INFO L225 Difference]: With dead ends: 221 [2021-11-12 23:22:59,774 INFO L226 Difference]: Without dead ends: 210 [2021-11-12 23:22:59,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:22:59,776 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 992.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.23ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1133.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:59,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 308 Unknown, 0 Unchecked, 2.23ms Time], IncrementalHoareTripleChecker [8 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 1133.78ms Time] [2021-11-12 23:22:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-12 23:22:59,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 152. [2021-11-12 23:22:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.1059602649006623) internal successors, (469), 151 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:59,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 469 transitions. [2021-11-12 23:22:59,812 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 469 transitions. Word has length 23 [2021-11-12 23:22:59,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:59,812 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 469 transitions. [2021-11-12 23:22:59,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 469 transitions. [2021-11-12 23:22:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-12 23:22:59,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:59,815 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:59,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:00,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:00,028 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:00,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:00,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2064294553, now seen corresponding path program 4 times [2021-11-12 23:23:00,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:00,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070133060] [2021-11-12 23:23:00,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:23:00,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:00,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:00,030 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:00,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:23:00,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:23:00,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:00,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:23:00,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:00,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:03,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:03,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070133060] [2021-11-12 23:23:03,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070133060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:03,092 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:03,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 23:23:03,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230194532] [2021-11-12 23:23:03,092 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:03,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:23:03,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:03,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:23:03,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:03,093 INFO L87 Difference]: Start difference. First operand 152 states and 469 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:04,254 INFO L93 Difference]: Finished difference Result 209 states and 628 transitions. [2021-11-12 23:23:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:23:04,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-12 23:23:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:04,257 INFO L225 Difference]: With dead ends: 209 [2021-11-12 23:23:04,257 INFO L226 Difference]: Without dead ends: 198 [2021-11-12 23:23:04,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:23:04,259 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 848.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 982.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:04,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 244 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [8 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 982.99ms Time] [2021-11-12 23:23:04,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-12 23:23:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 152. [2021-11-12 23:23:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.1059602649006623) internal successors, (469), 151 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 469 transitions. [2021-11-12 23:23:04,272 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 469 transitions. Word has length 23 [2021-11-12 23:23:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:04,273 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 469 transitions. [2021-11-12 23:23:04,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 469 transitions. [2021-11-12 23:23:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-12 23:23:04,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:04,275 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:04,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:04,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:04,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:04,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1365569937, now seen corresponding path program 5 times [2021-11-12 23:23:04,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:04,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389731964] [2021-11-12 23:23:04,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:23:04,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:04,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:04,490 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:04,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:23:04,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:23:04,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:04,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:23:04,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:05,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:06,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:06,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389731964] [2021-11-12 23:23:06,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389731964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:06,298 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:06,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:23:06,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157794868] [2021-11-12 23:23:06,298 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:06,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:23:06,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:23:06,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:23:06,300 INFO L87 Difference]: Start difference. First operand 152 states and 469 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:07,334 INFO L93 Difference]: Finished difference Result 241 states and 728 transitions. [2021-11-12 23:23:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:23:07,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-12 23:23:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:07,338 INFO L225 Difference]: With dead ends: 241 [2021-11-12 23:23:07,338 INFO L226 Difference]: Without dead ends: 230 [2021-11-12 23:23:07,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:23:07,339 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 681.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 778.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:07,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 778.98ms Time] [2021-11-12 23:23:07,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-12 23:23:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 182. [2021-11-12 23:23:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 3.110497237569061) internal successors, (563), 181 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 563 transitions. [2021-11-12 23:23:07,354 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 563 transitions. Word has length 23 [2021-11-12 23:23:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:07,355 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 563 transitions. [2021-11-12 23:23:07,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 563 transitions. [2021-11-12 23:23:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-12 23:23:07,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:07,357 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:07,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:07,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:07,570 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:07,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:07,570 INFO L85 PathProgramCache]: Analyzing trace with hash -834938329, now seen corresponding path program 6 times [2021-11-12 23:23:07,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:07,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944334520] [2021-11-12 23:23:07,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:23:07,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:07,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:07,572 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:07,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:23:07,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-11-12 23:23:07,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:07,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:23:07,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:08,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:10,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:10,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944334520] [2021-11-12 23:23:10,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944334520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:10,667 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:10,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 23:23:10,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522657713] [2021-11-12 23:23:10,667 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:10,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:23:10,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:23:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:10,668 INFO L87 Difference]: Start difference. First operand 182 states and 563 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:11,900 INFO L93 Difference]: Finished difference Result 279 states and 836 transitions. [2021-11-12 23:23:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:23:11,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-12 23:23:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:11,904 INFO L225 Difference]: With dead ends: 279 [2021-11-12 23:23:11,905 INFO L226 Difference]: Without dead ends: 268 [2021-11-12 23:23:11,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:23:11,906 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 940.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1061.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:11,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 278 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [6 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 1061.01ms Time] [2021-11-12 23:23:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-12 23:23:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 190. [2021-11-12 23:23:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 3.2063492063492065) internal successors, (606), 189 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 606 transitions. [2021-11-12 23:23:11,920 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 606 transitions. Word has length 23 [2021-11-12 23:23:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:11,920 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 606 transitions. [2021-11-12 23:23:11,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 606 transitions. [2021-11-12 23:23:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-12 23:23:11,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:11,922 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:11,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:12,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:12,134 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1671810957, now seen corresponding path program 7 times [2021-11-12 23:23:12,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:12,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681462478] [2021-11-12 23:23:12,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:23:12,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:12,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:12,137 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:12,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:23:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:12,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:23:12,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:12,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:14,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:14,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681462478] [2021-11-12 23:23:14,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681462478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:14,999 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:14,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 23:23:14,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115095991] [2021-11-12 23:23:14,999 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:14,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:23:15,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:15,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:23:15,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:15,000 INFO L87 Difference]: Start difference. First operand 190 states and 606 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:16,275 INFO L93 Difference]: Finished difference Result 257 states and 788 transitions. [2021-11-12 23:23:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:23:16,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-12 23:23:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:16,282 INFO L225 Difference]: With dead ends: 257 [2021-11-12 23:23:16,282 INFO L226 Difference]: Without dead ends: 246 [2021-11-12 23:23:16,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:23:16,283 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 972.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.24ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1097.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:16,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 321 Unknown, 0 Unchecked, 2.24ms Time], IncrementalHoareTripleChecker [7 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 1097.64ms Time] [2021-11-12 23:23:16,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-12 23:23:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 182. [2021-11-12 23:23:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 3.110497237569061) internal successors, (563), 181 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 563 transitions. [2021-11-12 23:23:16,294 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 563 transitions. Word has length 23 [2021-11-12 23:23:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:16,294 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 563 transitions. [2021-11-12 23:23:16,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 563 transitions. [2021-11-12 23:23:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:16,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:16,296 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:16,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:16,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:16,509 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash 232461433, now seen corresponding path program 1 times [2021-11-12 23:23:16,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:16,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799293359] [2021-11-12 23:23:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:16,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:16,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:16,511 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:16,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:23:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:16,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:23:16,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:17,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:17,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:17,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799293359] [2021-11-12 23:23:17,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799293359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:17,497 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:17,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:23:17,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343111423] [2021-11-12 23:23:17,497 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:17,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:23:17,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:17,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:23:17,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:17,499 INFO L87 Difference]: Start difference. First operand 182 states and 563 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:18,961 INFO L93 Difference]: Finished difference Result 362 states and 1089 transitions. [2021-11-12 23:23:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:23:18,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:18,966 INFO L225 Difference]: With dead ends: 362 [2021-11-12 23:23:18,966 INFO L226 Difference]: Without dead ends: 354 [2021-11-12 23:23:18,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:23:18,967 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 891.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.11ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1006.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:18,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 435 Unknown, 0 Unchecked, 3.11ms Time], IncrementalHoareTripleChecker [5 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1006.24ms Time] [2021-11-12 23:23:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-12 23:23:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 200. [2021-11-12 23:23:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 3.0854271356783918) internal successors, (614), 199 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 614 transitions. [2021-11-12 23:23:18,981 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 614 transitions. Word has length 24 [2021-11-12 23:23:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:18,981 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 614 transitions. [2021-11-12 23:23:18,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 614 transitions. [2021-11-12 23:23:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:18,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:18,984 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:19,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:19,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:19,194 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:19,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1375397838, now seen corresponding path program 1 times [2021-11-12 23:23:19,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:19,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412893571] [2021-11-12 23:23:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:19,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:19,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:19,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:23:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:19,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:19,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:19,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:19,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:19,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412893571] [2021-11-12 23:23:19,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412893571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:19,910 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:19,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:23:19,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642977785] [2021-11-12 23:23:19,911 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:19,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:23:19,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:19,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:23:19,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:19,913 INFO L87 Difference]: Start difference. First operand 200 states and 614 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:20,880 INFO L93 Difference]: Finished difference Result 392 states and 1173 transitions. [2021-11-12 23:23:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:20,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:20,886 INFO L225 Difference]: With dead ends: 392 [2021-11-12 23:23:20,886 INFO L226 Difference]: Without dead ends: 392 [2021-11-12 23:23:20,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:23:20,888 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 686.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 822.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:20,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 251 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [4 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 822.79ms Time] [2021-11-12 23:23:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-12 23:23:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 208. [2021-11-12 23:23:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 3.111111111111111) internal successors, (644), 207 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 644 transitions. [2021-11-12 23:23:20,902 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 644 transitions. Word has length 24 [2021-11-12 23:23:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:20,903 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 644 transitions. [2021-11-12 23:23:20,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 644 transitions. [2021-11-12 23:23:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:20,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:20,905 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:20,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:21,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:21,125 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:21,125 INFO L85 PathProgramCache]: Analyzing trace with hash 19371598, now seen corresponding path program 2 times [2021-11-12 23:23:21,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:21,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515389842] [2021-11-12 23:23:21,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:23:21,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:21,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:21,127 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:21,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:23:21,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:23:21,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:21,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:21,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:22,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:22,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515389842] [2021-11-12 23:23:22,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515389842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:22,100 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:22,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:22,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299867423] [2021-11-12 23:23:22,100 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:22,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:22,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:22,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:22,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:22,101 INFO L87 Difference]: Start difference. First operand 208 states and 644 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:23,043 INFO L93 Difference]: Finished difference Result 402 states and 1191 transitions. [2021-11-12 23:23:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:23,044 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:23,048 INFO L225 Difference]: With dead ends: 402 [2021-11-12 23:23:23,048 INFO L226 Difference]: Without dead ends: 396 [2021-11-12 23:23:23,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:23:23,050 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 625.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.77ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 731.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:23,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 310 Unknown, 0 Unchecked, 1.77ms Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 731.87ms Time] [2021-11-12 23:23:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-12 23:23:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 222. [2021-11-12 23:23:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.1176470588235294) internal successors, (689), 221 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 689 transitions. [2021-11-12 23:23:23,064 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 689 transitions. Word has length 24 [2021-11-12 23:23:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:23,064 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 689 transitions. [2021-11-12 23:23:23,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 689 transitions. [2021-11-12 23:23:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:23,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:23,067 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:23,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:23,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:23,282 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:23,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1924212431, now seen corresponding path program 2 times [2021-11-12 23:23:23,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:23,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172554281] [2021-11-12 23:23:23,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:23:23,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:23,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:23,285 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:23,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:23:23,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:23:23,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:23,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:23:23,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:23,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:24,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:24,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172554281] [2021-11-12 23:23:24,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172554281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:24,487 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:24,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:24,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075161787] [2021-11-12 23:23:24,488 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:24,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:24,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:24,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:24,488 INFO L87 Difference]: Start difference. First operand 222 states and 689 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:26,315 INFO L93 Difference]: Finished difference Result 388 states and 1179 transitions. [2021-11-12 23:23:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:23:26,316 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:26,319 INFO L225 Difference]: With dead ends: 388 [2021-11-12 23:23:26,319 INFO L226 Difference]: Without dead ends: 384 [2021-11-12 23:23:26,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:23:26,320 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1186.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.45ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1337.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:26,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 555 Unknown, 0 Unchecked, 3.45ms Time], IncrementalHoareTripleChecker [13 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 1337.34ms Time] [2021-11-12 23:23:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-12 23:23:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 230. [2021-11-12 23:23:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.1048034934497815) internal successors, (711), 229 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 711 transitions. [2021-11-12 23:23:26,333 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 711 transitions. Word has length 24 [2021-11-12 23:23:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:26,334 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 711 transitions. [2021-11-12 23:23:26,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 711 transitions. [2021-11-12 23:23:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:26,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:26,336 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:26,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 23:23:26,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:26,549 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:26,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:26,550 INFO L85 PathProgramCache]: Analyzing trace with hash -342637305, now seen corresponding path program 3 times [2021-11-12 23:23:26,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:26,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603430496] [2021-11-12 23:23:26,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:23:26,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:26,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:26,551 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:26,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:23:26,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:23:26,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:26,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:23:26,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:27,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:27,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:27,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603430496] [2021-11-12 23:23:27,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603430496] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:27,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:23:27,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:23:27,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993008241] [2021-11-12 23:23:27,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:27,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:23:27,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:23:27,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:27,537 INFO L87 Difference]: Start difference. First operand 230 states and 711 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:28,965 INFO L93 Difference]: Finished difference Result 464 states and 1334 transitions. [2021-11-12 23:23:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:23:28,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:28,970 INFO L225 Difference]: With dead ends: 464 [2021-11-12 23:23:28,970 INFO L226 Difference]: Without dead ends: 464 [2021-11-12 23:23:28,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:23:28,971 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 954.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.21ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1084.18ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:28,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 353 Unknown, 0 Unchecked, 2.21ms Time], IncrementalHoareTripleChecker [5 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 1084.18ms Time] [2021-11-12 23:23:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-12 23:23:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 226. [2021-11-12 23:23:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.111111111111111) internal successors, (700), 225 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 700 transitions. [2021-11-12 23:23:28,986 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 700 transitions. Word has length 24 [2021-11-12 23:23:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:28,986 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 700 transitions. [2021-11-12 23:23:28,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 700 transitions. [2021-11-12 23:23:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:28,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:28,988 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:29,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:29,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:29,201 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:29,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:29,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1470033398, now seen corresponding path program 3 times [2021-11-12 23:23:29,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:29,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080278535] [2021-11-12 23:23:29,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:23:29,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:29,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:29,204 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:29,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:23:29,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:23:29,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:29,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:29,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:29,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:30,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:30,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080278535] [2021-11-12 23:23:30,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080278535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:30,026 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:30,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:30,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259737080] [2021-11-12 23:23:30,026 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:30,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:30,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:30,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:30,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:30,027 INFO L87 Difference]: Start difference. First operand 226 states and 700 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:31,001 INFO L93 Difference]: Finished difference Result 394 states and 1189 transitions. [2021-11-12 23:23:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:31,002 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:31,005 INFO L225 Difference]: With dead ends: 394 [2021-11-12 23:23:31,005 INFO L226 Difference]: Without dead ends: 394 [2021-11-12 23:23:31,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:23:31,006 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 710.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.98ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 806.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:31,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 345 Unknown, 0 Unchecked, 1.98ms Time], IncrementalHoareTripleChecker [6 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 806.34ms Time] [2021-11-12 23:23:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-12 23:23:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 216. [2021-11-12 23:23:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.116279069767442) internal successors, (670), 215 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 670 transitions. [2021-11-12 23:23:31,018 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 670 transitions. Word has length 24 [2021-11-12 23:23:31,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:31,018 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 670 transitions. [2021-11-12 23:23:31,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 670 transitions. [2021-11-12 23:23:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:31,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:31,020 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:31,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:31,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:31,234 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:31,234 INFO L85 PathProgramCache]: Analyzing trace with hash -339502710, now seen corresponding path program 4 times [2021-11-12 23:23:31,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:31,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964510472] [2021-11-12 23:23:31,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:23:31,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:31,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:31,235 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:31,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:23:31,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:23:31,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:31,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:31,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:31,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:31,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:31,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964510472] [2021-11-12 23:23:31,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964510472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:31,960 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:31,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:23:31,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729116058] [2021-11-12 23:23:31,961 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:31,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:23:31,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:31,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:23:31,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:31,962 INFO L87 Difference]: Start difference. First operand 216 states and 670 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:32,692 INFO L93 Difference]: Finished difference Result 390 states and 1170 transitions. [2021-11-12 23:23:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:32,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:32,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:32,696 INFO L225 Difference]: With dead ends: 390 [2021-11-12 23:23:32,696 INFO L226 Difference]: Without dead ends: 376 [2021-11-12 23:23:32,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:23:32,697 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 496.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.38ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 564.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:32,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 260 Unknown, 0 Unchecked, 1.38ms Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 564.42ms Time] [2021-11-12 23:23:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-12 23:23:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 222. [2021-11-12 23:23:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.0995475113122173) internal successors, (685), 221 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 685 transitions. [2021-11-12 23:23:32,708 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 685 transitions. Word has length 24 [2021-11-12 23:23:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:32,708 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 685 transitions. [2021-11-12 23:23:32,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 685 transitions. [2021-11-12 23:23:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:32,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:32,710 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:32,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:32,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:32,923 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:32,923 INFO L85 PathProgramCache]: Analyzing trace with hash 164217780, now seen corresponding path program 5 times [2021-11-12 23:23:32,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:32,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001299469] [2021-11-12 23:23:32,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:23:32,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:32,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:32,925 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:32,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:23:33,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:23:33,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:33,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:33,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:33,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:33,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:33,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001299469] [2021-11-12 23:23:33,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001299469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:33,879 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:33,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:33,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67308563] [2021-11-12 23:23:33,882 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:33,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:33,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:33,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:33,884 INFO L87 Difference]: Start difference. First operand 222 states and 685 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:35,035 INFO L93 Difference]: Finished difference Result 412 states and 1225 transitions. [2021-11-12 23:23:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:35,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:35,040 INFO L225 Difference]: With dead ends: 412 [2021-11-12 23:23:35,040 INFO L226 Difference]: Without dead ends: 406 [2021-11-12 23:23:35,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:23:35,041 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 782.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.42ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 912.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:35,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 366 Unknown, 0 Unchecked, 2.42ms Time], IncrementalHoareTripleChecker [5 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 912.74ms Time] [2021-11-12 23:23:35,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-12 23:23:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 236. [2021-11-12 23:23:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.106382978723404) internal successors, (730), 235 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 730 transitions. [2021-11-12 23:23:35,054 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 730 transitions. Word has length 24 [2021-11-12 23:23:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:35,055 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 730 transitions. [2021-11-12 23:23:35,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 730 transitions. [2021-11-12 23:23:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:35,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:35,057 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:35,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:35,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:35,271 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1779366249, now seen corresponding path program 4 times [2021-11-12 23:23:35,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:35,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749949607] [2021-11-12 23:23:35,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:23:35,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:35,274 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:35,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:23:35,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:23:35,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:35,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:23:35,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:35,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:36,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:36,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749949607] [2021-11-12 23:23:36,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749949607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:36,223 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:36,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:36,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133441882] [2021-11-12 23:23:36,224 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:36,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:36,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:36,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:36,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:36,225 INFO L87 Difference]: Start difference. First operand 236 states and 730 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:37,798 INFO L93 Difference]: Finished difference Result 416 states and 1271 transitions. [2021-11-12 23:23:37,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:23:37,799 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:37,801 INFO L225 Difference]: With dead ends: 416 [2021-11-12 23:23:37,802 INFO L226 Difference]: Without dead ends: 412 [2021-11-12 23:23:37,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:23:37,802 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 894.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.69ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1020.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:37,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 445 Unknown, 0 Unchecked, 2.69ms Time], IncrementalHoareTripleChecker [13 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1020.17ms Time] [2021-11-12 23:23:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-12 23:23:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 250. [2021-11-12 23:23:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.104417670682731) internal successors, (773), 249 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 773 transitions. [2021-11-12 23:23:37,814 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 773 transitions. Word has length 24 [2021-11-12 23:23:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:37,814 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 773 transitions. [2021-11-12 23:23:37,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:37,815 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 773 transitions. [2021-11-12 23:23:37,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:37,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:37,816 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:37,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-12 23:23:38,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:38,034 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:38,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:38,034 INFO L85 PathProgramCache]: Analyzing trace with hash -197791123, now seen corresponding path program 5 times [2021-11-12 23:23:38,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:38,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253430020] [2021-11-12 23:23:38,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:23:38,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:38,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:38,036 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:38,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:23:38,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:23:38,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:38,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:23:38,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:38,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:38,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:38,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253430020] [2021-11-12 23:23:38,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253430020] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:38,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:23:38,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:23:38,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824832104] [2021-11-12 23:23:38,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:38,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:23:38,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:38,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:23:38,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:38,976 INFO L87 Difference]: Start difference. First operand 250 states and 773 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:40,493 INFO L93 Difference]: Finished difference Result 434 states and 1311 transitions. [2021-11-12 23:23:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:23:40,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:40,497 INFO L225 Difference]: With dead ends: 434 [2021-11-12 23:23:40,497 INFO L226 Difference]: Without dead ends: 434 [2021-11-12 23:23:40,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:23:40,498 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 950.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.18ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1079.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:40,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 352 Unknown, 0 Unchecked, 2.18ms Time], IncrementalHoareTripleChecker [10 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 1079.44ms Time] [2021-11-12 23:23:40,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-11-12 23:23:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 250. [2021-11-12 23:23:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.104417670682731) internal successors, (773), 249 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:40,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 773 transitions. [2021-11-12 23:23:40,511 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 773 transitions. Word has length 24 [2021-11-12 23:23:40,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:40,511 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 773 transitions. [2021-11-12 23:23:40,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 773 transitions. [2021-11-12 23:23:40,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:40,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:40,513 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:40,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:40,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:40,726 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:40,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:40,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1325187216, now seen corresponding path program 6 times [2021-11-12 23:23:40,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:40,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841613284] [2021-11-12 23:23:40,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:23:40,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:40,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:40,728 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:40,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:23:40,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:23:40,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:40,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:40,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:41,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:41,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:41,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841613284] [2021-11-12 23:23:41,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841613284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:41,662 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:41,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:41,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797269874] [2021-11-12 23:23:41,662 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:41,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:41,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:41,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:41,663 INFO L87 Difference]: Start difference. First operand 250 states and 773 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:42,780 INFO L93 Difference]: Finished difference Result 402 states and 1226 transitions. [2021-11-12 23:23:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:42,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:42,783 INFO L225 Difference]: With dead ends: 402 [2021-11-12 23:23:42,783 INFO L226 Difference]: Without dead ends: 402 [2021-11-12 23:23:42,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:23:42,783 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 788.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.38ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 908.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:42,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 368 Unknown, 0 Unchecked, 2.38ms Time], IncrementalHoareTripleChecker [5 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 908.29ms Time] [2021-11-12 23:23:42,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-12 23:23:42,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 236. [2021-11-12 23:23:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.1148936170212767) internal successors, (732), 235 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 732 transitions. [2021-11-12 23:23:42,794 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 732 transitions. Word has length 24 [2021-11-12 23:23:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:42,795 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 732 transitions. [2021-11-12 23:23:42,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:42,795 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 732 transitions. [2021-11-12 23:23:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:42,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:42,796 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:42,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:43,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:43,009 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2034226455, now seen corresponding path program 6 times [2021-11-12 23:23:43,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:43,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410977088] [2021-11-12 23:23:43,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:23:43,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:43,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:43,011 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:43,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:23:43,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:23:43,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:43,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:23:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:43,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:43,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:43,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410977088] [2021-11-12 23:23:43,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410977088] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:43,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:23:43,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-12 23:23:43,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635300265] [2021-11-12 23:23:43,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:43,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:23:43,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:43,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:23:43,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:43,691 INFO L87 Difference]: Start difference. First operand 236 states and 732 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:44,619 INFO L93 Difference]: Finished difference Result 418 states and 1262 transitions. [2021-11-12 23:23:44,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:23:44,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:44,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:44,622 INFO L225 Difference]: With dead ends: 418 [2021-11-12 23:23:44,622 INFO L226 Difference]: Without dead ends: 418 [2021-11-12 23:23:44,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:23:44,623 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 684.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.46ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 790.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:44,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 346 Unknown, 0 Unchecked, 1.46ms Time], IncrementalHoareTripleChecker [4 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 790.02ms Time] [2021-11-12 23:23:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-12 23:23:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 228. [2021-11-12 23:23:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.1101321585903086) internal successors, (706), 227 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 706 transitions. [2021-11-12 23:23:44,631 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 706 transitions. Word has length 24 [2021-11-12 23:23:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:44,632 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 706 transitions. [2021-11-12 23:23:44,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 706 transitions. [2021-11-12 23:23:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:44,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:44,633 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:44,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:44,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:44,833 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:44,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1032935161, now seen corresponding path program 7 times [2021-11-12 23:23:44,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:44,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724928413] [2021-11-12 23:23:44,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:23:44,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:44,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:44,835 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:44,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:23:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:45,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:23:45,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:45,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:46,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:46,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724928413] [2021-11-12 23:23:46,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724928413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:46,146 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:46,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:46,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685630804] [2021-11-12 23:23:46,146 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:46,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:46,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:46,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:46,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:46,147 INFO L87 Difference]: Start difference. First operand 228 states and 706 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:47,596 INFO L93 Difference]: Finished difference Result 468 states and 1396 transitions. [2021-11-12 23:23:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:23:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:47,599 INFO L225 Difference]: With dead ends: 468 [2021-11-12 23:23:47,600 INFO L226 Difference]: Without dead ends: 460 [2021-11-12 23:23:47,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:23:47,600 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 920.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1050.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:47,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 490 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [8 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1050.29ms Time] [2021-11-12 23:23:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-12 23:23:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 234. [2021-11-12 23:23:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.124463519313305) internal successors, (728), 233 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 728 transitions. [2021-11-12 23:23:47,609 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 728 transitions. Word has length 24 [2021-11-12 23:23:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:47,609 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 728 transitions. [2021-11-12 23:23:47,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 728 transitions. [2021-11-12 23:23:47,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:47,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:47,611 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:47,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:47,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:47,823 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:47,824 INFO L85 PathProgramCache]: Analyzing trace with hash 110001244, now seen corresponding path program 7 times [2021-11-12 23:23:47,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:47,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799035742] [2021-11-12 23:23:47,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:23:47,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:47,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:47,825 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:47,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:23:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:47,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:47,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:48,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:48,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:48,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799035742] [2021-11-12 23:23:48,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799035742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:48,708 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:48,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:48,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319910716] [2021-11-12 23:23:48,708 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:48,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:48,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:48,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:48,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:48,709 INFO L87 Difference]: Start difference. First operand 234 states and 728 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:49,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:49,403 INFO L93 Difference]: Finished difference Result 498 states and 1502 transitions. [2021-11-12 23:23:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:49,403 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:49,407 INFO L225 Difference]: With dead ends: 498 [2021-11-12 23:23:49,407 INFO L226 Difference]: Without dead ends: 498 [2021-11-12 23:23:49,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:23:49,408 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 515.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 593.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:49,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 233 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 593.49ms Time] [2021-11-12 23:23:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-12 23:23:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 240. [2021-11-12 23:23:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1548117154811717) internal successors, (754), 239 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 754 transitions. [2021-11-12 23:23:49,417 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 754 transitions. Word has length 24 [2021-11-12 23:23:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:49,418 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 754 transitions. [2021-11-12 23:23:49,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 754 transitions. [2021-11-12 23:23:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:49,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:49,419 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:49,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:49,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:49,631 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:49,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:49,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1246024996, now seen corresponding path program 8 times [2021-11-12 23:23:49,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:49,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594031026] [2021-11-12 23:23:49,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:23:49,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:49,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:49,633 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:49,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:23:49,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:23:49,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:49,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:50,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:50,704 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:50,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594031026] [2021-11-12 23:23:50,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594031026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:50,705 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:50,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:23:50,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024965477] [2021-11-12 23:23:50,705 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:50,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:23:50,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:23:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:23:50,706 INFO L87 Difference]: Start difference. First operand 240 states and 754 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:51,547 INFO L93 Difference]: Finished difference Result 504 states and 1513 transitions. [2021-11-12 23:23:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:51,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:51,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:51,551 INFO L225 Difference]: With dead ends: 504 [2021-11-12 23:23:51,551 INFO L226 Difference]: Without dead ends: 498 [2021-11-12 23:23:51,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:23:51,551 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 592.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.02ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 669.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:51,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 271 Unknown, 0 Unchecked, 1.02ms Time], IncrementalHoareTripleChecker [11 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 669.91ms Time] [2021-11-12 23:23:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-12 23:23:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 254. [2021-11-12 23:23:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.158102766798419) internal successors, (799), 253 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 799 transitions. [2021-11-12 23:23:51,563 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 799 transitions. Word has length 24 [2021-11-12 23:23:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:51,563 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 799 transitions. [2021-11-12 23:23:51,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:51,564 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 799 transitions. [2021-11-12 23:23:51,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:51,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:51,565 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:51,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:51,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:51,778 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:51,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1105358271, now seen corresponding path program 8 times [2021-11-12 23:23:51,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:51,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940576548] [2021-11-12 23:23:51,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:23:51,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:51,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:51,780 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:51,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:23:51,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:23:51,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:51,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:23:51,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:52,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:53,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:53,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940576548] [2021-11-12 23:23:53,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940576548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:53,364 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:53,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:23:53,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395068781] [2021-11-12 23:23:53,365 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:53,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:23:53,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:53,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:23:53,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:23:53,366 INFO L87 Difference]: Start difference. First operand 254 states and 799 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:54,881 INFO L93 Difference]: Finished difference Result 484 states and 1475 transitions. [2021-11-12 23:23:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:23:54,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:54,885 INFO L225 Difference]: With dead ends: 484 [2021-11-12 23:23:54,885 INFO L226 Difference]: Without dead ends: 480 [2021-11-12 23:23:54,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:23:54,886 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 125 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 906.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1028.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:54,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 0 Invalid, 356 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [17 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 1028.45ms Time] [2021-11-12 23:23:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-12 23:23:54,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 262. [2021-11-12 23:23:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.1455938697318007) internal successors, (821), 261 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 821 transitions. [2021-11-12 23:23:54,898 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 821 transitions. Word has length 24 [2021-11-12 23:23:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:54,898 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 821 transitions. [2021-11-12 23:23:54,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 821 transitions. [2021-11-12 23:23:54,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:54,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:54,900 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:54,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-12 23:23:55,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:55,114 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:55,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1608033899, now seen corresponding path program 9 times [2021-11-12 23:23:55,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:55,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245870197] [2021-11-12 23:23:55,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:23:55,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:55,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:55,116 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:55,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:23:55,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:23:55,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:55,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:23:55,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:55,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:56,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:56,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245870197] [2021-11-12 23:23:56,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245870197] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:56,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:23:56,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:23:56,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593939378] [2021-11-12 23:23:56,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:56,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:23:56,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:56,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:23:56,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:23:56,595 INFO L87 Difference]: Start difference. First operand 262 states and 821 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:58,433 INFO L93 Difference]: Finished difference Result 594 states and 1693 transitions. [2021-11-12 23:23:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:23:58,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:23:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:58,437 INFO L225 Difference]: With dead ends: 594 [2021-11-12 23:23:58,437 INFO L226 Difference]: Without dead ends: 594 [2021-11-12 23:23:58,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:23:58,438 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 997.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1119.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:58,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 266 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [5 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1119.41ms Time] [2021-11-12 23:23:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-12 23:23:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 254. [2021-11-12 23:23:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.142292490118577) internal successors, (795), 253 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 795 transitions. [2021-11-12 23:23:58,449 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 795 transitions. Word has length 24 [2021-11-12 23:23:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:58,450 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 795 transitions. [2021-11-12 23:23:58,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 795 transitions. [2021-11-12 23:23:58,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:23:58,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:58,451 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:58,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-12 23:23:58,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:58,672 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:23:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:58,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1559537304, now seen corresponding path program 9 times [2021-11-12 23:23:58,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:58,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567802855] [2021-11-12 23:23:58,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:23:58,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:58,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:58,674 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:58,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:23:58,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:23:58,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:23:58,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:58,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:59,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:23:59,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:59,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567802855] [2021-11-12 23:23:59,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567802855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:59,772 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:59,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:23:59,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315194586] [2021-11-12 23:23:59,772 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:59,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:23:59,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:59,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:23:59,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:23:59,774 INFO L87 Difference]: Start difference. First operand 254 states and 795 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:00,570 INFO L93 Difference]: Finished difference Result 518 states and 1559 transitions. [2021-11-12 23:24:00,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:00,571 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:00,574 INFO L225 Difference]: With dead ends: 518 [2021-11-12 23:24:00,574 INFO L226 Difference]: Without dead ends: 518 [2021-11-12 23:24:00,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:24:00,575 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 588.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.04ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 667.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:00,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 280 Unknown, 0 Unchecked, 1.04ms Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 667.67ms Time] [2021-11-12 23:24:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-12 23:24:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 246. [2021-11-12 23:24:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.1551020408163266) internal successors, (773), 245 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 773 transitions. [2021-11-12 23:24:00,584 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 773 transitions. Word has length 24 [2021-11-12 23:24:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:00,585 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 773 transitions. [2021-11-12 23:24:00,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 773 transitions. [2021-11-12 23:24:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:00,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:00,586 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:00,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-12 23:24:00,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:00,799 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1661594281, now seen corresponding path program 10 times [2021-11-12 23:24:00,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:00,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240764394] [2021-11-12 23:24:00,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:24:00,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:00,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:00,801 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:00,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:24:00,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:24:00,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:00,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:24:00,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:01,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:02,092 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:02,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240764394] [2021-11-12 23:24:02,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240764394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:02,093 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:02,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:24:02,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886620571] [2021-11-12 23:24:02,093 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:02,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:24:02,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:02,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:24:02,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:24:02,095 INFO L87 Difference]: Start difference. First operand 246 states and 773 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:03,415 INFO L93 Difference]: Finished difference Result 440 states and 1339 transitions. [2021-11-12 23:24:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:24:03,415 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:03,418 INFO L225 Difference]: With dead ends: 440 [2021-11-12 23:24:03,418 INFO L226 Difference]: Without dead ends: 432 [2021-11-12 23:24:03,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:24:03,419 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 841.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 955.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:03,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 448 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [5 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 955.58ms Time] [2021-11-12 23:24:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-12 23:24:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 248. [2021-11-12 23:24:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.1497975708502026) internal successors, (778), 247 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 778 transitions. [2021-11-12 23:24:03,427 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 778 transitions. Word has length 24 [2021-11-12 23:24:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:03,427 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 778 transitions. [2021-11-12 23:24:03,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 778 transitions. [2021-11-12 23:24:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:03,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:03,429 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:03,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:03,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:03,642 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:03,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1115861375, now seen corresponding path program 11 times [2021-11-12 23:24:03,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:03,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953587055] [2021-11-12 23:24:03,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:24:03,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:03,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:03,643 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:03,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:24:03,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:24:03,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:03,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:24:03,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:04,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:05,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:05,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953587055] [2021-11-12 23:24:05,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953587055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:05,055 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:05,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:05,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417351950] [2021-11-12 23:24:05,055 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:05,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:05,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:05,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:05,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:05,057 INFO L87 Difference]: Start difference. First operand 248 states and 778 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:06,521 INFO L93 Difference]: Finished difference Result 428 states and 1328 transitions. [2021-11-12 23:24:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:24:06,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:06,524 INFO L225 Difference]: With dead ends: 428 [2021-11-12 23:24:06,524 INFO L226 Difference]: Without dead ends: 424 [2021-11-12 23:24:06,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:24:06,525 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 900.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1021.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:06,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 443 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [11 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1021.14ms Time] [2021-11-12 23:24:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-12 23:24:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 256. [2021-11-12 23:24:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.1333333333333333) internal successors, (799), 255 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 799 transitions. [2021-11-12 23:24:06,534 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 799 transitions. Word has length 24 [2021-11-12 23:24:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:06,534 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 799 transitions. [2021-11-12 23:24:06,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 799 transitions. [2021-11-12 23:24:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:06,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:06,536 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:06,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:06,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:06,749 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:06,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:06,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2478357, now seen corresponding path program 12 times [2021-11-12 23:24:06,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:06,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295466775] [2021-11-12 23:24:06,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:24:06,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:06,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:06,751 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:06,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:24:06,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:24:06,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:06,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:24:06,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:07,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:08,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:08,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295466775] [2021-11-12 23:24:08,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295466775] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:08,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:08,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:24:08,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048957643] [2021-11-12 23:24:08,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:08,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:08,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:08,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:08,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:08,406 INFO L87 Difference]: Start difference. First operand 256 states and 799 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:09,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:09,900 INFO L93 Difference]: Finished difference Result 548 states and 1589 transitions. [2021-11-12 23:24:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:24:09,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:09,903 INFO L225 Difference]: With dead ends: 548 [2021-11-12 23:24:09,904 INFO L226 Difference]: Without dead ends: 548 [2021-11-12 23:24:09,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:24:09,904 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 918.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1027.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:09,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 263 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [4 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 1027.53ms Time] [2021-11-12 23:24:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-12 23:24:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 254. [2021-11-12 23:24:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.1343873517786562) internal successors, (793), 253 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 793 transitions. [2021-11-12 23:24:09,914 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 793 transitions. Word has length 24 [2021-11-12 23:24:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:09,914 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 793 transitions. [2021-11-12 23:24:09,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 793 transitions. [2021-11-12 23:24:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:09,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:09,915 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:09,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:10,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:10,115 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash 697746566, now seen corresponding path program 10 times [2021-11-12 23:24:10,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:10,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067084366] [2021-11-12 23:24:10,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:24:10,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:10,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:10,117 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:10,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:24:10,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:24:10,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:10,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:10,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:10,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:11,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:11,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067084366] [2021-11-12 23:24:11,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067084366] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:11,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:11,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:24:11,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70063630] [2021-11-12 23:24:11,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:11,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:11,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:24:11,286 INFO L87 Difference]: Start difference. First operand 254 states and 793 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:12,396 INFO L93 Difference]: Finished difference Result 502 states and 1525 transitions. [2021-11-12 23:24:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:12,399 INFO L225 Difference]: With dead ends: 502 [2021-11-12 23:24:12,400 INFO L226 Difference]: Without dead ends: 502 [2021-11-12 23:24:12,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:24:12,400 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 728.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 821.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:12,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 257 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 821.77ms Time] [2021-11-12 23:24:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-12 23:24:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 242. [2021-11-12 23:24:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.132780082987552) internal successors, (755), 241 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 755 transitions. [2021-11-12 23:24:12,409 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 755 transitions. Word has length 24 [2021-11-12 23:24:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:12,409 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 755 transitions. [2021-11-12 23:24:12,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 755 transitions. [2021-11-12 23:24:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:12,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:12,410 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:12,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:12,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:12,611 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:12,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:12,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1073768544, now seen corresponding path program 11 times [2021-11-12 23:24:12,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:12,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128692729] [2021-11-12 23:24:12,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:24:12,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:12,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:12,613 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:12,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:24:12,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:24:12,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:12,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:12,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:13,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:14,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:14,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128692729] [2021-11-12 23:24:14,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128692729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:14,020 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:14,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:14,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509972667] [2021-11-12 23:24:14,020 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:14,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:14,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:14,021 INFO L87 Difference]: Start difference. First operand 242 states and 755 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:14,829 INFO L93 Difference]: Finished difference Result 486 states and 1491 transitions. [2021-11-12 23:24:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:14,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:14,833 INFO L225 Difference]: With dead ends: 486 [2021-11-12 23:24:14,833 INFO L226 Difference]: Without dead ends: 486 [2021-11-12 23:24:14,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:14,834 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 647.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 741.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:14,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 303 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [10 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 741.29ms Time] [2021-11-12 23:24:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-12 23:24:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 248. [2021-11-12 23:24:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.174089068825911) internal successors, (784), 247 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 784 transitions. [2021-11-12 23:24:14,841 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 784 transitions. Word has length 24 [2021-11-12 23:24:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:14,842 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 784 transitions. [2021-11-12 23:24:14,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 784 transitions. [2021-11-12 23:24:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:14,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:14,843 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:14,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:15,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:15,056 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:15,056 INFO L85 PathProgramCache]: Analyzing trace with hash -618410738, now seen corresponding path program 12 times [2021-11-12 23:24:15,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:15,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514677395] [2021-11-12 23:24:15,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:24:15,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:15,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:15,058 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:15,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:24:15,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:24:15,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:15,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:16,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:16,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514677395] [2021-11-12 23:24:16,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514677395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:16,581 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:16,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:16,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587072877] [2021-11-12 23:24:16,582 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:16,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:16,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:16,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:16,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:16,583 INFO L87 Difference]: Start difference. First operand 248 states and 784 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:17,510 INFO L93 Difference]: Finished difference Result 472 states and 1459 transitions. [2021-11-12 23:24:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:17,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:17,514 INFO L225 Difference]: With dead ends: 472 [2021-11-12 23:24:17,515 INFO L226 Difference]: Without dead ends: 472 [2021-11-12 23:24:17,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:17,515 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 765.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 869.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:17,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 387 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [6 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 869.79ms Time] [2021-11-12 23:24:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-12 23:24:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 248. [2021-11-12 23:24:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.174089068825911) internal successors, (784), 247 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 784 transitions. [2021-11-12 23:24:17,525 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 784 transitions. Word has length 24 [2021-11-12 23:24:17,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:17,525 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 784 transitions. [2021-11-12 23:24:17,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:17,525 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 784 transitions. [2021-11-12 23:24:17,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:17,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:17,526 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:17,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:17,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:17,739 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:17,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1702776216, now seen corresponding path program 13 times [2021-11-12 23:24:17,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:17,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143353070] [2021-11-12 23:24:17,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:24:17,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:17,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:17,740 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:17,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:24:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:17,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:17,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:18,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:19,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:19,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143353070] [2021-11-12 23:24:19,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143353070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:19,045 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:19,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:19,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750564070] [2021-11-12 23:24:19,045 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:19,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:19,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:19,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:19,046 INFO L87 Difference]: Start difference. First operand 248 states and 784 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:19,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:19,899 INFO L93 Difference]: Finished difference Result 500 states and 1521 transitions. [2021-11-12 23:24:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:19,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:19,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:19,903 INFO L225 Difference]: With dead ends: 500 [2021-11-12 23:24:19,903 INFO L226 Difference]: Without dead ends: 494 [2021-11-12 23:24:19,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:24:19,904 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 621.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 710.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:19,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 283 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [9 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 710.65ms Time] [2021-11-12 23:24:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-12 23:24:19,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 262. [2021-11-12 23:24:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.1992337164750957) internal successors, (835), 261 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 835 transitions. [2021-11-12 23:24:19,915 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 835 transitions. Word has length 24 [2021-11-12 23:24:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:19,915 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 835 transitions. [2021-11-12 23:24:19,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 835 transitions. [2021-11-12 23:24:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:19,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:19,916 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:19,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-12 23:24:20,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:20,129 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:20,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:20,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1131321410, now seen corresponding path program 14 times [2021-11-12 23:24:20,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:20,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739012037] [2021-11-12 23:24:20,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:24:20,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:20,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:20,132 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:20,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 23:24:20,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:24:20,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:20,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:21,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:21,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739012037] [2021-11-12 23:24:21,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739012037] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:21,525 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:21,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:21,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178566168] [2021-11-12 23:24:21,525 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:21,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:21,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:21,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:21,526 INFO L87 Difference]: Start difference. First operand 262 states and 835 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:22,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:22,249 INFO L93 Difference]: Finished difference Result 508 states and 1551 transitions. [2021-11-12 23:24:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:22,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:22,253 INFO L225 Difference]: With dead ends: 508 [2021-11-12 23:24:22,253 INFO L226 Difference]: Without dead ends: 508 [2021-11-12 23:24:22,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:24:22,254 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 111 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 512.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 588.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:22,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 0 Invalid, 222 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [12 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 588.37ms Time] [2021-11-12 23:24:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-12 23:24:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 262. [2021-11-12 23:24:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.1992337164750957) internal successors, (835), 261 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 835 transitions. [2021-11-12 23:24:22,262 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 835 transitions. Word has length 24 [2021-11-12 23:24:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:22,263 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 835 transitions. [2021-11-12 23:24:22,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 835 transitions. [2021-11-12 23:24:22,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:22,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:22,264 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:22,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:22,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:22,464 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:22,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:22,465 INFO L85 PathProgramCache]: Analyzing trace with hash -983875898, now seen corresponding path program 15 times [2021-11-12 23:24:22,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:22,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779400401] [2021-11-12 23:24:22,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:24:22,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:22,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:22,466 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:22,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 23:24:22,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:24:22,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:22,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:22,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:23,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:23,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:23,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779400401] [2021-11-12 23:24:23,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779400401] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:23,859 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:23,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:23,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94813124] [2021-11-12 23:24:23,859 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:23,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:23,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:23,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:23,860 INFO L87 Difference]: Start difference. First operand 262 states and 835 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:24,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:24,912 INFO L93 Difference]: Finished difference Result 502 states and 1524 transitions. [2021-11-12 23:24:24,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:24,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:24,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:24,916 INFO L225 Difference]: With dead ends: 502 [2021-11-12 23:24:24,916 INFO L226 Difference]: Without dead ends: 496 [2021-11-12 23:24:24,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:24:24,917 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 796.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 911.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:24,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 352 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [10 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 911.29ms Time] [2021-11-12 23:24:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-12 23:24:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 270. [2021-11-12 23:24:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2304832713754648) internal successors, (869), 269 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 869 transitions. [2021-11-12 23:24:24,927 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 869 transitions. Word has length 24 [2021-11-12 23:24:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:24,927 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 869 transitions. [2021-11-12 23:24:24,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 869 transitions. [2021-11-12 23:24:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:24,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:24,929 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:24,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-12 23:24:25,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:25,141 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:25,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:25,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1367507369, now seen corresponding path program 13 times [2021-11-12 23:24:25,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:25,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301336009] [2021-11-12 23:24:25,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:24:25,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:25,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:25,143 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:25,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-12 23:24:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:25,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:24:25,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:25,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:26,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:26,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301336009] [2021-11-12 23:24:26,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301336009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:26,793 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:26,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:26,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115850071] [2021-11-12 23:24:26,793 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:26,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:26,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:26,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:26,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:26,794 INFO L87 Difference]: Start difference. First operand 270 states and 869 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:29,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:29,077 INFO L93 Difference]: Finished difference Result 516 states and 1592 transitions. [2021-11-12 23:24:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:24:29,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:29,081 INFO L225 Difference]: With dead ends: 516 [2021-11-12 23:24:29,081 INFO L226 Difference]: Without dead ends: 512 [2021-11-12 23:24:29,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:24:29,082 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 118 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1205.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.08ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1368.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:29,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 0 Invalid, 535 Unknown, 0 Unchecked, 2.08ms Time], IncrementalHoareTripleChecker [23 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1368.95ms Time] [2021-11-12 23:24:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-12 23:24:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 280. [2021-11-12 23:24:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.240143369175627) internal successors, (904), 279 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 904 transitions. [2021-11-12 23:24:29,091 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 904 transitions. Word has length 24 [2021-11-12 23:24:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:29,091 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 904 transitions. [2021-11-12 23:24:29,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 904 transitions. [2021-11-12 23:24:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:29,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:29,092 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:29,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:29,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:29,292 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:29,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1345884801, now seen corresponding path program 14 times [2021-11-12 23:24:29,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:29,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812670428] [2021-11-12 23:24:29,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:24:29,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:29,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:29,294 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:29,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 23:24:29,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:24:29,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:29,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:24:29,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:30,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:31,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:31,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812670428] [2021-11-12 23:24:31,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812670428] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:31,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:31,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:24:31,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370068178] [2021-11-12 23:24:31,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:31,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:31,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:31,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:31,053 INFO L87 Difference]: Start difference. First operand 280 states and 904 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:32,732 INFO L93 Difference]: Finished difference Result 580 states and 1728 transitions. [2021-11-12 23:24:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:24:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:32,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:32,736 INFO L225 Difference]: With dead ends: 580 [2021-11-12 23:24:32,736 INFO L226 Difference]: Without dead ends: 580 [2021-11-12 23:24:32,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:24:32,737 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 949.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1067.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:32,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 257 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [8 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1067.88ms Time] [2021-11-12 23:24:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-12 23:24:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 280. [2021-11-12 23:24:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.240143369175627) internal successors, (904), 279 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 904 transitions. [2021-11-12 23:24:32,747 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 904 transitions. Word has length 24 [2021-11-12 23:24:32,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:32,747 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 904 transitions. [2021-11-12 23:24:32,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 904 transitions. [2021-11-12 23:24:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:32,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:32,749 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:32,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-12 23:24:32,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:32,959 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:32,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1821686402, now seen corresponding path program 16 times [2021-11-12 23:24:32,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:32,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173110693] [2021-11-12 23:24:32,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:24:32,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:32,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:32,961 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:32,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 23:24:33,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:24:33,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:33,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:33,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:33,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:34,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:34,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173110693] [2021-11-12 23:24:34,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173110693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:34,318 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:34,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:34,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92294494] [2021-11-12 23:24:34,319 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:34,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:34,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:34,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:34,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:34,320 INFO L87 Difference]: Start difference. First operand 280 states and 904 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:35,383 INFO L93 Difference]: Finished difference Result 508 states and 1576 transitions. [2021-11-12 23:24:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:35,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:35,388 INFO L225 Difference]: With dead ends: 508 [2021-11-12 23:24:35,388 INFO L226 Difference]: Without dead ends: 508 [2021-11-12 23:24:35,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:24:35,389 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 826.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 938.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:35,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 352 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [9 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 938.34ms Time] [2021-11-12 23:24:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-12 23:24:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 276. [2021-11-12 23:24:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.247272727272727) internal successors, (893), 275 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 893 transitions. [2021-11-12 23:24:35,399 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 893 transitions. Word has length 24 [2021-11-12 23:24:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:35,399 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 893 transitions. [2021-11-12 23:24:35,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 893 transitions. [2021-11-12 23:24:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:35,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:35,400 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:35,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:35,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:35,601 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1316518969, now seen corresponding path program 15 times [2021-11-12 23:24:35,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:35,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165855530] [2021-11-12 23:24:35,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:24:35,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:35,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:35,602 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:35,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 23:24:35,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:24:35,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:35,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:24:35,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:36,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:37,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:37,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165855530] [2021-11-12 23:24:37,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165855530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:37,297 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:37,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:37,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194672845] [2021-11-12 23:24:37,298 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:37,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:37,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:37,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:37,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:37,299 INFO L87 Difference]: Start difference. First operand 276 states and 893 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:39,735 INFO L93 Difference]: Finished difference Result 508 states and 1566 transitions. [2021-11-12 23:24:39,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:24:39,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:39,745 INFO L225 Difference]: With dead ends: 508 [2021-11-12 23:24:39,745 INFO L226 Difference]: Without dead ends: 504 [2021-11-12 23:24:39,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:24:39,746 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1358.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.50ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1539.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:39,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 629 Unknown, 0 Unchecked, 2.50ms Time], IncrementalHoareTripleChecker [19 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1539.62ms Time] [2021-11-12 23:24:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-12 23:24:39,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 280. [2021-11-12 23:24:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.25089605734767) internal successors, (907), 279 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 907 transitions. [2021-11-12 23:24:39,757 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 907 transitions. Word has length 24 [2021-11-12 23:24:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:39,757 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 907 transitions. [2021-11-12 23:24:39,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:39,758 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 907 transitions. [2021-11-12 23:24:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:39,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:39,759 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:39,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:39,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:39,971 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:39,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:39,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1865065309, now seen corresponding path program 16 times [2021-11-12 23:24:39,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:39,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786600231] [2021-11-12 23:24:39,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:24:39,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:39,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:39,973 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:39,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 23:24:40,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:24:40,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:40,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:24:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:40,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:41,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:41,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786600231] [2021-11-12 23:24:41,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786600231] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:41,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:41,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:24:41,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841036126] [2021-11-12 23:24:41,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:41,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:41,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:41,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:41,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:41,701 INFO L87 Difference]: Start difference. First operand 280 states and 907 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:43,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:43,301 INFO L93 Difference]: Finished difference Result 588 states and 1742 transitions. [2021-11-12 23:24:43,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:24:43,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:43,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:43,304 INFO L225 Difference]: With dead ends: 588 [2021-11-12 23:24:43,304 INFO L226 Difference]: Without dead ends: 588 [2021-11-12 23:24:43,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:24:43,305 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1041.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1156.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:43,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 293 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [5 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 1156.50ms Time] [2021-11-12 23:24:43,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-11-12 23:24:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 278. [2021-11-12 23:24:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.256317689530686) internal successors, (902), 277 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 902 transitions. [2021-11-12 23:24:43,316 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 902 transitions. Word has length 24 [2021-11-12 23:24:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:43,316 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 902 transitions. [2021-11-12 23:24:43,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 902 transitions. [2021-11-12 23:24:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:43,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:43,317 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:43,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-12 23:24:43,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:43,518 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:43,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1501019991, now seen corresponding path program 17 times [2021-11-12 23:24:43,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:43,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089706516] [2021-11-12 23:24:43,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:24:43,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:43,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:43,519 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:43,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 23:24:43,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:24:43,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:43,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:24:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:44,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:45,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:45,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089706516] [2021-11-12 23:24:45,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089706516] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:45,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:45,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:24:45,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844052978] [2021-11-12 23:24:45,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:45,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:45,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:45,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:45,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:45,421 INFO L87 Difference]: Start difference. First operand 278 states and 902 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:47,099 INFO L93 Difference]: Finished difference Result 626 states and 1817 transitions. [2021-11-12 23:24:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:24:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:47,101 INFO L225 Difference]: With dead ends: 626 [2021-11-12 23:24:47,101 INFO L226 Difference]: Without dead ends: 626 [2021-11-12 23:24:47,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:24:47,102 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 973.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1094.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:47,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1094.21ms Time] [2021-11-12 23:24:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-12 23:24:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 276. [2021-11-12 23:24:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.2436363636363637) internal successors, (892), 275 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 892 transitions. [2021-11-12 23:24:47,110 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 892 transitions. Word has length 24 [2021-11-12 23:24:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:47,110 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 892 transitions. [2021-11-12 23:24:47,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 892 transitions. [2021-11-12 23:24:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:47,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:47,111 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:47,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:47,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:47,312 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:47,312 INFO L85 PathProgramCache]: Analyzing trace with hash -645713337, now seen corresponding path program 18 times [2021-11-12 23:24:47,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:47,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150342349] [2021-11-12 23:24:47,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:24:47,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:47,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:47,313 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:47,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 23:24:47,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:24:47,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:47,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:24:47,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:48,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:49,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:49,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150342349] [2021-11-12 23:24:49,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150342349] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:49,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:49,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:24:49,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018781402] [2021-11-12 23:24:49,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:49,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:49,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:49,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:49,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:49,252 INFO L87 Difference]: Start difference. First operand 276 states and 892 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:50,875 INFO L93 Difference]: Finished difference Result 598 states and 1757 transitions. [2021-11-12 23:24:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:24:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:50,877 INFO L225 Difference]: With dead ends: 598 [2021-11-12 23:24:50,877 INFO L226 Difference]: Without dead ends: 598 [2021-11-12 23:24:50,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:24:50,878 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1026.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.19ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1145.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:50,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 259 Unknown, 0 Unchecked, 1.19ms Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 1145.27ms Time] [2021-11-12 23:24:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-12 23:24:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 270. [2021-11-12 23:24:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2565055762081783) internal successors, (876), 269 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 876 transitions. [2021-11-12 23:24:50,890 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 876 transitions. Word has length 24 [2021-11-12 23:24:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:50,890 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 876 transitions. [2021-11-12 23:24:50,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 876 transitions. [2021-11-12 23:24:50,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:50,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:50,892 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:50,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-12 23:24:51,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:51,098 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:51,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2090560506, now seen corresponding path program 17 times [2021-11-12 23:24:51,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:51,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957869105] [2021-11-12 23:24:51,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:24:51,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:51,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:51,100 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:51,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 23:24:51,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:24:51,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:51,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:51,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:51,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:52,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:52,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957869105] [2021-11-12 23:24:52,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957869105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:52,612 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:52,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:52,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371187314] [2021-11-12 23:24:52,612 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:52,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:52,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:52,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:52,613 INFO L87 Difference]: Start difference. First operand 270 states and 876 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:53,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:53,536 INFO L93 Difference]: Finished difference Result 492 states and 1535 transitions. [2021-11-12 23:24:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:53,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:53,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:53,538 INFO L225 Difference]: With dead ends: 492 [2021-11-12 23:24:53,538 INFO L226 Difference]: Without dead ends: 492 [2021-11-12 23:24:53,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:53,539 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 746.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 853.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:53,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 317 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [13 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 853.84ms Time] [2021-11-12 23:24:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-12 23:24:53,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 270. [2021-11-12 23:24:53,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2565055762081783) internal successors, (876), 269 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 876 transitions. [2021-11-12 23:24:53,550 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 876 transitions. Word has length 24 [2021-11-12 23:24:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:53,550 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 876 transitions. [2021-11-12 23:24:53,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 876 transitions. [2021-11-12 23:24:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:53,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:53,552 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:53,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:53,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:53,764 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1286456600, now seen corresponding path program 18 times [2021-11-12 23:24:53,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:53,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944972951] [2021-11-12 23:24:53,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:24:53,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:53,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:53,766 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:53,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 23:24:53,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:24:53,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:53,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:53,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:54,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:55,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:55,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944972951] [2021-11-12 23:24:55,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944972951] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:55,192 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:55,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:55,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360053124] [2021-11-12 23:24:55,193 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:55,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:55,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:55,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:55,193 INFO L87 Difference]: Start difference. First operand 270 states and 876 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:56,128 INFO L93 Difference]: Finished difference Result 478 states and 1511 transitions. [2021-11-12 23:24:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:56,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:56,131 INFO L225 Difference]: With dead ends: 478 [2021-11-12 23:24:56,131 INFO L226 Difference]: Without dead ends: 478 [2021-11-12 23:24:56,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:56,131 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 769.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.28ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 877.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:56,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 339 Unknown, 0 Unchecked, 1.28ms Time], IncrementalHoareTripleChecker [13 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 877.73ms Time] [2021-11-12 23:24:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-12 23:24:56,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 256. [2021-11-12 23:24:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.231372549019608) internal successors, (824), 255 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:56,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 824 transitions. [2021-11-12 23:24:56,142 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 824 transitions. Word has length 24 [2021-11-12 23:24:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:56,142 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 824 transitions. [2021-11-12 23:24:56,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:56,142 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 824 transitions. [2021-11-12 23:24:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:56,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:56,143 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:56,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:56,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:56,347 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:56,347 INFO L85 PathProgramCache]: Analyzing trace with hash 272201952, now seen corresponding path program 19 times [2021-11-12 23:24:56,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:56,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866112016] [2021-11-12 23:24:56,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:24:56,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:56,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:56,349 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:56,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-12 23:24:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:56,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:56,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:57,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:57,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866112016] [2021-11-12 23:24:57,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866112016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:57,504 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:57,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:24:57,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561453411] [2021-11-12 23:24:57,504 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:57,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:24:57,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:57,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:24:57,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:24:57,505 INFO L87 Difference]: Start difference. First operand 256 states and 824 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:58,424 INFO L93 Difference]: Finished difference Result 482 states and 1472 transitions. [2021-11-12 23:24:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:58,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:24:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:58,426 INFO L225 Difference]: With dead ends: 482 [2021-11-12 23:24:58,426 INFO L226 Difference]: Without dead ends: 468 [2021-11-12 23:24:58,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:24:58,427 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 682.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 773.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:58,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 369 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [2 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 773.84ms Time] [2021-11-12 23:24:58,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-12 23:24:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 264. [2021-11-12 23:24:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.247148288973384) internal successors, (854), 263 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 854 transitions. [2021-11-12 23:24:58,435 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 854 transitions. Word has length 24 [2021-11-12 23:24:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:58,435 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 854 transitions. [2021-11-12 23:24:58,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 854 transitions. [2021-11-12 23:24:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:24:58,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:58,436 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:58,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:58,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:58,637 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:24:58,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:58,637 INFO L85 PathProgramCache]: Analyzing trace with hash -832392740, now seen corresponding path program 20 times [2021-11-12 23:24:58,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:58,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134188815] [2021-11-12 23:24:58,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:24:58,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:58,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:58,638 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:58,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-12 23:24:58,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:24:58,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:24:58,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:58,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:59,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:24:59,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:59,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134188815] [2021-11-12 23:24:59,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134188815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:59,949 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:59,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:24:59,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456654002] [2021-11-12 23:24:59,949 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:59,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:59,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:59,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:59,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:59,950 INFO L87 Difference]: Start difference. First operand 264 states and 854 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:00,825 INFO L93 Difference]: Finished difference Result 494 states and 1494 transitions. [2021-11-12 23:25:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:00,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:00,827 INFO L225 Difference]: With dead ends: 494 [2021-11-12 23:25:00,827 INFO L226 Difference]: Without dead ends: 488 [2021-11-12 23:25:00,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:25:00,828 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 606.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 690.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:00,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 292 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [5 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 690.79ms Time] [2021-11-12 23:25:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-12 23:25:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 274. [2021-11-12 23:25:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.21978021978022) internal successors, (879), 273 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 879 transitions. [2021-11-12 23:25:00,835 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 879 transitions. Word has length 24 [2021-11-12 23:25:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:00,836 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 879 transitions. [2021-11-12 23:25:00,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 879 transitions. [2021-11-12 23:25:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:00,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:00,837 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:00,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:01,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:01,050 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:01,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1403847546, now seen corresponding path program 21 times [2021-11-12 23:25:01,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:01,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764956172] [2021-11-12 23:25:01,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:25:01,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:01,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:01,051 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:01,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-12 23:25:01,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:25:01,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:01,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:01,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:01,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:02,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:02,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764956172] [2021-11-12 23:25:02,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764956172] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:02,447 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:02,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:02,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235744072] [2021-11-12 23:25:02,447 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:02,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:02,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:02,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:02,448 INFO L87 Difference]: Start difference. First operand 274 states and 879 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:03,314 INFO L93 Difference]: Finished difference Result 474 states and 1465 transitions. [2021-11-12 23:25:03,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:03,315 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:03,316 INFO L225 Difference]: With dead ends: 474 [2021-11-12 23:25:03,316 INFO L226 Difference]: Without dead ends: 474 [2021-11-12 23:25:03,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:25:03,317 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 608.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 696.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:03,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 321 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 696.07ms Time] [2021-11-12 23:25:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-12 23:25:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 264. [2021-11-12 23:25:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.247148288973384) internal successors, (854), 263 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 854 transitions. [2021-11-12 23:25:03,325 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 854 transitions. Word has length 24 [2021-11-12 23:25:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:03,326 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 854 transitions. [2021-11-12 23:25:03,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:03,326 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 854 transitions. [2021-11-12 23:25:03,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:03,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:03,327 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:03,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:03,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:03,531 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:03,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1409634958, now seen corresponding path program 22 times [2021-11-12 23:25:03,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:03,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533325883] [2021-11-12 23:25:03,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:25:03,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:03,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:03,534 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:03,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-12 23:25:03,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:25:03,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:04,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:04,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:04,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533325883] [2021-11-12 23:25:04,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533325883] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:04,696 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:04,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:25:04,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855211695] [2021-11-12 23:25:04,696 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:04,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:25:04,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:04,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:25:04,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:25:04,697 INFO L87 Difference]: Start difference. First operand 264 states and 854 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:05,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:05,453 INFO L93 Difference]: Finished difference Result 518 states and 1572 transitions. [2021-11-12 23:25:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:05,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:05,455 INFO L225 Difference]: With dead ends: 518 [2021-11-12 23:25:05,455 INFO L226 Difference]: Without dead ends: 504 [2021-11-12 23:25:05,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:25:05,456 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 538.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 612.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:05,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 278 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [4 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 612.89ms Time] [2021-11-12 23:25:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-12 23:25:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 270. [2021-11-12 23:25:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.2304832713754648) internal successors, (869), 269 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 869 transitions. [2021-11-12 23:25:05,464 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 869 transitions. Word has length 24 [2021-11-12 23:25:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:05,464 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 869 transitions. [2021-11-12 23:25:05,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 869 transitions. [2021-11-12 23:25:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:05,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:05,465 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:05,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:05,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:05,665 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:05,666 INFO L85 PathProgramCache]: Analyzing trace with hash -905914468, now seen corresponding path program 23 times [2021-11-12 23:25:05,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:05,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737012183] [2021-11-12 23:25:05,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:25:05,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:05,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:05,667 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:05,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-12 23:25:05,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:25:05,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:05,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:05,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:06,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:07,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:07,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737012183] [2021-11-12 23:25:07,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737012183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:07,076 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:07,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:07,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372231337] [2021-11-12 23:25:07,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:07,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:07,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:07,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:07,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:07,078 INFO L87 Difference]: Start difference. First operand 270 states and 869 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:08,226 INFO L93 Difference]: Finished difference Result 520 states and 1592 transitions. [2021-11-12 23:25:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:08,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:08,228 INFO L225 Difference]: With dead ends: 520 [2021-11-12 23:25:08,228 INFO L226 Difference]: Without dead ends: 514 [2021-11-12 23:25:08,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:25:08,228 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 847.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 955.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:08,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 405 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [9 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 955.60ms Time] [2021-11-12 23:25:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-12 23:25:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 284. [2021-11-12 23:25:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.2296819787985864) internal successors, (914), 283 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 914 transitions. [2021-11-12 23:25:08,236 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 914 transitions. Word has length 24 [2021-11-12 23:25:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:08,236 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 914 transitions. [2021-11-12 23:25:08,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 914 transitions. [2021-11-12 23:25:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:08,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:08,237 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:08,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:08,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:08,438 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:08,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:08,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1445468799, now seen corresponding path program 19 times [2021-11-12 23:25:08,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:08,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241063503] [2021-11-12 23:25:08,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:25:08,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:08,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:08,440 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:08,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-12 23:25:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:08,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:25:08,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:09,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:09,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:09,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241063503] [2021-11-12 23:25:09,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241063503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:09,659 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:09,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:09,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611503855] [2021-11-12 23:25:09,659 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:09,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:09,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:09,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:09,660 INFO L87 Difference]: Start difference. First operand 284 states and 914 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:11,275 INFO L93 Difference]: Finished difference Result 582 states and 1808 transitions. [2021-11-12 23:25:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:25:11,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:11,278 INFO L225 Difference]: With dead ends: 582 [2021-11-12 23:25:11,278 INFO L226 Difference]: Without dead ends: 578 [2021-11-12 23:25:11,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:25:11,279 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 157 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 894.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.77ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1018.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:11,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 0 Invalid, 491 Unknown, 0 Unchecked, 1.77ms Time], IncrementalHoareTripleChecker [16 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1018.57ms Time] [2021-11-12 23:25:11,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-12 23:25:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 302. [2021-11-12 23:25:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.249169435215947) internal successors, (978), 301 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 978 transitions. [2021-11-12 23:25:11,287 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 978 transitions. Word has length 24 [2021-11-12 23:25:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:11,287 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 978 transitions. [2021-11-12 23:25:11,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 978 transitions. [2021-11-12 23:25:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:11,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:11,288 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:11,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:11,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:11,489 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1267923371, now seen corresponding path program 20 times [2021-11-12 23:25:11,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:11,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669115469] [2021-11-12 23:25:11,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:25:11,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:11,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:11,496 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:11,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-12 23:25:11,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:25:11,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:25:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:12,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:12,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:12,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669115469] [2021-11-12 23:25:12,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669115469] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:12,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:25:12,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:25:12,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707194585] [2021-11-12 23:25:12,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:12,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:25:12,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:12,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:25:12,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:12,770 INFO L87 Difference]: Start difference. First operand 302 states and 978 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:14,108 INFO L93 Difference]: Finished difference Result 526 states and 1665 transitions. [2021-11-12 23:25:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:25:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:14,111 INFO L225 Difference]: With dead ends: 526 [2021-11-12 23:25:14,111 INFO L226 Difference]: Without dead ends: 526 [2021-11-12 23:25:14,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:25:14,112 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 753.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 860.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:14,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 244 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [16 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 860.10ms Time] [2021-11-12 23:25:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-12 23:25:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 302. [2021-11-12 23:25:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.249169435215947) internal successors, (978), 301 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 978 transitions. [2021-11-12 23:25:14,131 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 978 transitions. Word has length 24 [2021-11-12 23:25:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:14,131 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 978 transitions. [2021-11-12 23:25:14,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 978 transitions. [2021-11-12 23:25:14,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:14,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:14,133 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:14,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:14,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:14,346 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:14,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1899647832, now seen corresponding path program 24 times [2021-11-12 23:25:14,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:14,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926891367] [2021-11-12 23:25:14,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:25:14,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:14,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:14,348 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:14,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-12 23:25:14,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:25:14,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:14,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:14,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:14,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:15,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:15,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926891367] [2021-11-12 23:25:15,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926891367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:15,745 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:15,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:15,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273968010] [2021-11-12 23:25:15,746 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:15,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:15,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:15,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:15,747 INFO L87 Difference]: Start difference. First operand 302 states and 978 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:16,841 INFO L93 Difference]: Finished difference Result 514 states and 1614 transitions. [2021-11-12 23:25:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:16,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:16,844 INFO L225 Difference]: With dead ends: 514 [2021-11-12 23:25:16,844 INFO L226 Difference]: Without dead ends: 514 [2021-11-12 23:25:16,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:25:16,844 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 818.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 926.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:16,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 368 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [7 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 926.02ms Time] [2021-11-12 23:25:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-12 23:25:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 288. [2021-11-12 23:25:16,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.264808362369338) internal successors, (937), 287 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 937 transitions. [2021-11-12 23:25:16,852 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 937 transitions. Word has length 24 [2021-11-12 23:25:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:16,852 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 937 transitions. [2021-11-12 23:25:16,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 937 transitions. [2021-11-12 23:25:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:16,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:16,853 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:16,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:17,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:17,053 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:17,054 INFO L85 PathProgramCache]: Analyzing trace with hash 964094207, now seen corresponding path program 21 times [2021-11-12 23:25:17,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:17,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423726911] [2021-11-12 23:25:17,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:25:17,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:17,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:17,055 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:17,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-12 23:25:17,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:25:17,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:17,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:25:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:17,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:18,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:18,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423726911] [2021-11-12 23:25:18,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423726911] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:18,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:25:18,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:25:18,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544029006] [2021-11-12 23:25:18,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:18,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:25:18,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:18,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:25:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:25:18,119 INFO L87 Difference]: Start difference. First operand 288 states and 937 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:19,307 INFO L93 Difference]: Finished difference Result 524 states and 1668 transitions. [2021-11-12 23:25:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:25:19,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:19,309 INFO L225 Difference]: With dead ends: 524 [2021-11-12 23:25:19,309 INFO L226 Difference]: Without dead ends: 524 [2021-11-12 23:25:19,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:25:19,309 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 773.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.28ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 879.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:19,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 290 Unknown, 0 Unchecked, 1.28ms Time], IncrementalHoareTripleChecker [5 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 879.38ms Time] [2021-11-12 23:25:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-12 23:25:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 282. [2021-11-12 23:25:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.281138790035587) internal successors, (922), 281 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 922 transitions. [2021-11-12 23:25:19,318 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 922 transitions. Word has length 24 [2021-11-12 23:25:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:19,318 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 922 transitions. [2021-11-12 23:25:19,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 922 transitions. [2021-11-12 23:25:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:19,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:19,319 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:19,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-11-12 23:25:19,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:19,520 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1898040562, now seen corresponding path program 25 times [2021-11-12 23:25:19,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:19,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174348284] [2021-11-12 23:25:19,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:25:19,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:19,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:19,521 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:19,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-12 23:25:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:19,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:19,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:20,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:20,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:20,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174348284] [2021-11-12 23:25:20,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174348284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:20,942 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:20,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:20,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379688493] [2021-11-12 23:25:20,942 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:20,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:20,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:20,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:20,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:20,943 INFO L87 Difference]: Start difference. First operand 282 states and 922 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:21,875 INFO L93 Difference]: Finished difference Result 536 states and 1667 transitions. [2021-11-12 23:25:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:21,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:21,877 INFO L225 Difference]: With dead ends: 536 [2021-11-12 23:25:21,878 INFO L226 Difference]: Without dead ends: 530 [2021-11-12 23:25:21,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:25:21,878 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 119 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 697.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 793.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:21,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 0 Invalid, 280 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [8 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 793.58ms Time] [2021-11-12 23:25:21,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-12 23:25:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 296. [2021-11-12 23:25:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.298305084745763) internal successors, (973), 295 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 973 transitions. [2021-11-12 23:25:21,890 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 973 transitions. Word has length 24 [2021-11-12 23:25:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:21,890 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 973 transitions. [2021-11-12 23:25:21,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 973 transitions. [2021-11-12 23:25:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:21,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:21,892 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:21,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-11-12 23:25:22,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:22,105 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:22,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:22,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1326585756, now seen corresponding path program 26 times [2021-11-12 23:25:22,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:22,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152291909] [2021-11-12 23:25:22,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:25:22,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:22,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:22,106 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:22,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-12 23:25:22,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:25:22,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:22,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:22,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:22,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:23,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:23,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152291909] [2021-11-12 23:25:23,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152291909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:23,724 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:23,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:23,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960947180] [2021-11-12 23:25:23,725 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:23,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:23,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:23,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:23,726 INFO L87 Difference]: Start difference. First operand 296 states and 973 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:24,771 INFO L93 Difference]: Finished difference Result 540 states and 1687 transitions. [2021-11-12 23:25:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:24,772 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:24,773 INFO L225 Difference]: With dead ends: 540 [2021-11-12 23:25:24,773 INFO L226 Difference]: Without dead ends: 540 [2021-11-12 23:25:24,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:25:24,774 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 791.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 905.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:24,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 326 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [6 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 905.06ms Time] [2021-11-12 23:25:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-12 23:25:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 294. [2021-11-12 23:25:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.303754266211604) internal successors, (968), 293 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 968 transitions. [2021-11-12 23:25:24,782 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 968 transitions. Word has length 24 [2021-11-12 23:25:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:24,782 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 968 transitions. [2021-11-12 23:25:24,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 968 transitions. [2021-11-12 23:25:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:24,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:24,784 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:24,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-11-12 23:25:24,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:24,984 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:24,984 INFO L85 PathProgramCache]: Analyzing trace with hash -788611552, now seen corresponding path program 27 times [2021-11-12 23:25:24,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:24,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142384393] [2021-11-12 23:25:24,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:25:24,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:24,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:24,986 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:24,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-12 23:25:25,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:25:25,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:25,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:25,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:25,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:26,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:26,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142384393] [2021-11-12 23:25:26,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142384393] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:26,475 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:26,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:26,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56336103] [2021-11-12 23:25:26,475 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:26,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:26,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:26,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:26,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:26,476 INFO L87 Difference]: Start difference. First operand 294 states and 968 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:27,557 INFO L93 Difference]: Finished difference Result 532 states and 1650 transitions. [2021-11-12 23:25:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:27,560 INFO L225 Difference]: With dead ends: 532 [2021-11-12 23:25:27,560 INFO L226 Difference]: Without dead ends: 526 [2021-11-12 23:25:27,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:25:27,561 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 822.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 943.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:27,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 366 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [10 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 943.50ms Time] [2021-11-12 23:25:27,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-12 23:25:27,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 302. [2021-11-12 23:25:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.3289036544850497) internal successors, (1002), 301 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1002 transitions. [2021-11-12 23:25:27,573 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1002 transitions. Word has length 24 [2021-11-12 23:25:27,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:27,573 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1002 transitions. [2021-11-12 23:25:27,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1002 transitions. [2021-11-12 23:25:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:27,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:27,575 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:27,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:27,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:27,787 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:27,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:27,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1562771715, now seen corresponding path program 22 times [2021-11-12 23:25:27,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:27,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395589797] [2021-11-12 23:25:27,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:25:27,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:27,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:27,789 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:27,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-12 23:25:27,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:25:27,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:27,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:25:27,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:28,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:29,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:29,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395589797] [2021-11-12 23:25:29,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395589797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:29,517 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:29,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:29,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682251921] [2021-11-12 23:25:29,517 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:29,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:29,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:29,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:29,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:29,518 INFO L87 Difference]: Start difference. First operand 302 states and 1002 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:31,448 INFO L93 Difference]: Finished difference Result 558 states and 1770 transitions. [2021-11-12 23:25:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:25:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:31,451 INFO L225 Difference]: With dead ends: 558 [2021-11-12 23:25:31,451 INFO L226 Difference]: Without dead ends: 554 [2021-11-12 23:25:31,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:25:31,452 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 166 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1015.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.90ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1153.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:31,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 0 Invalid, 492 Unknown, 0 Unchecked, 1.90ms Time], IncrementalHoareTripleChecker [23 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 1153.82ms Time] [2021-11-12 23:25:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-12 23:25:31,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 308. [2021-11-12 23:25:31,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.3550488599348536) internal successors, (1030), 307 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1030 transitions. [2021-11-12 23:25:31,464 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1030 transitions. Word has length 24 [2021-11-12 23:25:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:31,464 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 1030 transitions. [2021-11-12 23:25:31,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1030 transitions. [2021-11-12 23:25:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:31,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:31,466 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:31,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:31,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:31,678 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:31,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:31,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1150620455, now seen corresponding path program 23 times [2021-11-12 23:25:31,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:31,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105889543] [2021-11-12 23:25:31,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:25:31,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:31,680 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:31,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-12 23:25:31,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:25:31,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:31,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:25:31,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:32,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:33,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:33,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105889543] [2021-11-12 23:25:33,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105889543] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:33,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:25:33,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:25:33,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834311098] [2021-11-12 23:25:33,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:33,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:25:33,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:33,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:25:33,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:33,229 INFO L87 Difference]: Start difference. First operand 308 states and 1030 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:35,352 INFO L93 Difference]: Finished difference Result 752 states and 2165 transitions. [2021-11-12 23:25:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:25:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:35,355 INFO L225 Difference]: With dead ends: 752 [2021-11-12 23:25:35,355 INFO L226 Difference]: Without dead ends: 752 [2021-11-12 23:25:35,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:25:35,356 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 177 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1098.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1242.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:35,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 0 Invalid, 309 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [20 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 1242.07ms Time] [2021-11-12 23:25:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-11-12 23:25:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 304. [2021-11-12 23:25:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.3366336633663365) internal successors, (1011), 303 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1011 transitions. [2021-11-12 23:25:35,367 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1011 transitions. Word has length 24 [2021-11-12 23:25:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:35,367 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1011 transitions. [2021-11-12 23:25:35,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1011 transitions. [2021-11-12 23:25:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:35,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:35,368 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:35,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:35,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:35,569 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:35,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:35,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2016950748, now seen corresponding path program 28 times [2021-11-12 23:25:35,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:35,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819893894] [2021-11-12 23:25:35,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:25:35,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:35,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:35,570 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:35,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-12 23:25:35,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:25:35,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:35,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:35,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:36,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:37,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:37,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819893894] [2021-11-12 23:25:37,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819893894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:37,000 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:37,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:37,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058960732] [2021-11-12 23:25:37,001 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:37,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:37,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:37,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:37,001 INFO L87 Difference]: Start difference. First operand 304 states and 1011 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:38,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:38,194 INFO L93 Difference]: Finished difference Result 522 states and 1654 transitions. [2021-11-12 23:25:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:38,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:38,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:38,196 INFO L225 Difference]: With dead ends: 522 [2021-11-12 23:25:38,196 INFO L226 Difference]: Without dead ends: 522 [2021-11-12 23:25:38,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:25:38,196 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 945.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1072.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:38,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 364 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [11 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 1072.28ms Time] [2021-11-12 23:25:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-12 23:25:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 300. [2021-11-12 23:25:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.3444816053511706) internal successors, (1000), 299 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 1000 transitions. [2021-11-12 23:25:38,204 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 1000 transitions. Word has length 24 [2021-11-12 23:25:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:38,204 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 1000 transitions. [2021-11-12 23:25:38,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 1000 transitions. [2021-11-12 23:25:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:38,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:38,205 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:38,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:38,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:38,406 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:38,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:38,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1121254623, now seen corresponding path program 24 times [2021-11-12 23:25:38,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:38,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240203321] [2021-11-12 23:25:38,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:25:38,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:38,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:38,408 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:38,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-12 23:25:38,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:25:38,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:38,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:25:38,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:39,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:39,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:39,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240203321] [2021-11-12 23:25:39,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240203321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:39,972 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:39,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:39,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734739749] [2021-11-12 23:25:39,973 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:39,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:39,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:39,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:39,973 INFO L87 Difference]: Start difference. First operand 300 states and 1000 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:41,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:41,976 INFO L93 Difference]: Finished difference Result 568 states and 1764 transitions. [2021-11-12 23:25:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:25:41,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:41,981 INFO L225 Difference]: With dead ends: 568 [2021-11-12 23:25:41,981 INFO L226 Difference]: Without dead ends: 564 [2021-11-12 23:25:41,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:25:41,982 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1124.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1275.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:41,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 0 Invalid, 574 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [14 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 1275.41ms Time] [2021-11-12 23:25:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-12 23:25:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 304. [2021-11-12 23:25:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.3465346534653464) internal successors, (1014), 303 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1014 transitions. [2021-11-12 23:25:41,995 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1014 transitions. Word has length 24 [2021-11-12 23:25:41,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:41,995 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1014 transitions. [2021-11-12 23:25:41,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1014 transitions. [2021-11-12 23:25:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:41,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:41,997 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:42,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-11-12 23:25:42,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:42,209 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:42,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:42,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2060329655, now seen corresponding path program 25 times [2021-11-12 23:25:42,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:42,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309014335] [2021-11-12 23:25:42,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:25:42,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:42,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:42,211 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:42,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-12 23:25:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:42,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:25:42,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:43,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:43,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:43,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309014335] [2021-11-12 23:25:43,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309014335] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:43,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:25:43,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:25:43,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076127332] [2021-11-12 23:25:43,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:43,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:25:43,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:25:43,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:43,898 INFO L87 Difference]: Start difference. First operand 304 states and 1014 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:44,971 INFO L93 Difference]: Finished difference Result 558 states and 1734 transitions. [2021-11-12 23:25:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:25:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:44,973 INFO L225 Difference]: With dead ends: 558 [2021-11-12 23:25:44,973 INFO L226 Difference]: Without dead ends: 558 [2021-11-12 23:25:44,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:25:44,973 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 695.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 786.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:44,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 226 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [6 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 786.08ms Time] [2021-11-12 23:25:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-12 23:25:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 302. [2021-11-12 23:25:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.352159468438538) internal successors, (1009), 301 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1009 transitions. [2021-11-12 23:25:44,981 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1009 transitions. Word has length 24 [2021-11-12 23:25:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:44,981 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1009 transitions. [2021-11-12 23:25:44,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1009 transitions. [2021-11-12 23:25:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:44,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:44,982 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:44,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-11-12 23:25:45,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:45,187 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:45,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:45,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1305755645, now seen corresponding path program 26 times [2021-11-12 23:25:45,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:45,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201998399] [2021-11-12 23:25:45,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:25:45,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:45,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:45,190 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:45,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-11-12 23:25:45,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:25:45,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:25:45,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:46,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:47,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:47,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201998399] [2021-11-12 23:25:47,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201998399] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:47,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:25:47,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:25:47,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743671589] [2021-11-12 23:25:47,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:47,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:25:47,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:47,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:25:47,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:47,259 INFO L87 Difference]: Start difference. First operand 302 states and 1009 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:48,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:48,856 INFO L93 Difference]: Finished difference Result 652 states and 1958 transitions. [2021-11-12 23:25:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:25:48,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:48,858 INFO L225 Difference]: With dead ends: 652 [2021-11-12 23:25:48,858 INFO L226 Difference]: Without dead ends: 652 [2021-11-12 23:25:48,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:25:48,859 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 886.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 992.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:48,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 239 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 992.27ms Time] [2021-11-12 23:25:48,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-12 23:25:48,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 306. [2021-11-12 23:25:48,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.380327868852459) internal successors, (1031), 305 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1031 transitions. [2021-11-12 23:25:48,868 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1031 transitions. Word has length 24 [2021-11-12 23:25:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:48,868 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 1031 transitions. [2021-11-12 23:25:48,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:48,868 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1031 transitions. [2021-11-12 23:25:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:48,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:48,869 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:48,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:49,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:49,070 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:49,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:49,070 INFO L85 PathProgramCache]: Analyzing trace with hash -450448991, now seen corresponding path program 27 times [2021-11-12 23:25:49,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:49,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581890714] [2021-11-12 23:25:49,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:25:49,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:49,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:49,072 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:49,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-12 23:25:49,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:25:49,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:49,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:25:49,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:49,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:50,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:50,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581890714] [2021-11-12 23:25:50,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581890714] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:50,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:25:50,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:25:50,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239597290] [2021-11-12 23:25:50,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:50,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:25:50,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:50,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:25:50,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:50,947 INFO L87 Difference]: Start difference. First operand 306 states and 1031 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:52,769 INFO L93 Difference]: Finished difference Result 624 states and 1898 transitions. [2021-11-12 23:25:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:25:52,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:52,772 INFO L225 Difference]: With dead ends: 624 [2021-11-12 23:25:52,772 INFO L226 Difference]: Without dead ends: 624 [2021-11-12 23:25:52,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:25:52,773 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1178.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.62ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1319.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:52,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 344 Unknown, 0 Unchecked, 1.62ms Time], IncrementalHoareTripleChecker [7 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1319.86ms Time] [2021-11-12 23:25:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-12 23:25:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 302. [2021-11-12 23:25:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.352159468438538) internal successors, (1009), 301 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1009 transitions. [2021-11-12 23:25:52,795 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1009 transitions. Word has length 24 [2021-11-12 23:25:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:52,795 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1009 transitions. [2021-11-12 23:25:52,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1009 transitions. [2021-11-12 23:25:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:52,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:52,797 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:52,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2021-11-12 23:25:53,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:53,010 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:53,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:53,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1895296160, now seen corresponding path program 29 times [2021-11-12 23:25:53,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:53,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125772549] [2021-11-12 23:25:53,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:25:53,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:53,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:53,014 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:53,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-12 23:25:53,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:25:53,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:53,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:53,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:53,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:54,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:54,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125772549] [2021-11-12 23:25:54,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125772549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:54,628 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:54,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:54,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314562948] [2021-11-12 23:25:54,628 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:54,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:54,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:54,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:54,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:54,629 INFO L87 Difference]: Start difference. First operand 302 states and 1009 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:55,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:55,539 INFO L93 Difference]: Finished difference Result 512 states and 1627 transitions. [2021-11-12 23:25:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:55,540 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:55,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:55,541 INFO L225 Difference]: With dead ends: 512 [2021-11-12 23:25:55,541 INFO L226 Difference]: Without dead ends: 512 [2021-11-12 23:25:55,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:25:55,541 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 741.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 841.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:55,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 292 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [9 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 841.33ms Time] [2021-11-12 23:25:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-12 23:25:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 302. [2021-11-12 23:25:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.352159468438538) internal successors, (1009), 301 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1009 transitions. [2021-11-12 23:25:55,553 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1009 transitions. Word has length 24 [2021-11-12 23:25:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:55,553 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1009 transitions. [2021-11-12 23:25:55,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1009 transitions. [2021-11-12 23:25:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:55,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:55,555 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:55,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2021-11-12 23:25:55,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:55,767 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:55,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:55,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1481720946, now seen corresponding path program 30 times [2021-11-12 23:25:55,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:55,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400864407] [2021-11-12 23:25:55,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:25:55,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:55,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:55,768 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:55,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-11-12 23:25:55,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:25:55,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:55,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:55,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:56,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:57,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:57,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400864407] [2021-11-12 23:25:57,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400864407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:57,384 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:57,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:25:57,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619223208] [2021-11-12 23:25:57,384 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:57,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:25:57,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:57,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:25:57,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:25:57,386 INFO L87 Difference]: Start difference. First operand 302 states and 1009 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:58,520 INFO L93 Difference]: Finished difference Result 498 states and 1603 transitions. [2021-11-12 23:25:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:58,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:25:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:58,521 INFO L225 Difference]: With dead ends: 498 [2021-11-12 23:25:58,521 INFO L226 Difference]: Without dead ends: 498 [2021-11-12 23:25:58,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:25:58,522 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 946.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1076.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:58,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 409 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [7 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 1076.40ms Time] [2021-11-12 23:25:58,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-12 23:25:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 286. [2021-11-12 23:25:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.312280701754386) internal successors, (944), 285 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 944 transitions. [2021-11-12 23:25:58,529 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 944 transitions. Word has length 24 [2021-11-12 23:25:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:58,529 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 944 transitions. [2021-11-12 23:25:58,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 944 transitions. [2021-11-12 23:25:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:25:58,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:58,530 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:58,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:58,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:58,731 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:25:58,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:58,731 INFO L85 PathProgramCache]: Analyzing trace with hash 449870613, now seen corresponding path program 28 times [2021-11-12 23:25:58,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:58,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477977370] [2021-11-12 23:25:58,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:25:58,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:58,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:58,732 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:58,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-12 23:25:58,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:25:58,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:58,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:25:58,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:59,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:25:59,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:59,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477977370] [2021-11-12 23:25:59,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477977370] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:59,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:25:59,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:25:59,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122594513] [2021-11-12 23:25:59,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:59,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:25:59,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:59,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:25:59,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:25:59,894 INFO L87 Difference]: Start difference. First operand 286 states and 944 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:01,109 INFO L93 Difference]: Finished difference Result 652 states and 1937 transitions. [2021-11-12 23:26:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:26:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:01,111 INFO L225 Difference]: With dead ends: 652 [2021-11-12 23:26:01,111 INFO L226 Difference]: Without dead ends: 652 [2021-11-12 23:26:01,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:26:01,111 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 809.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 925.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:01,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 286 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 925.82ms Time] [2021-11-12 23:26:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-12 23:26:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 284. [2021-11-12 23:26:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3074204946996466) internal successors, (936), 283 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 936 transitions. [2021-11-12 23:26:01,122 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 936 transitions. Word has length 24 [2021-11-12 23:26:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:01,123 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 936 transitions. [2021-11-12 23:26:01,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:01,123 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 936 transitions. [2021-11-12 23:26:01,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:01,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:01,124 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:01,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:01,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:01,328 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:01,328 INFO L85 PathProgramCache]: Analyzing trace with hash -832687463, now seen corresponding path program 29 times [2021-11-12 23:26:01,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:01,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963501408] [2021-11-12 23:26:01,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:26:01,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:01,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:01,330 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:01,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-12 23:26:01,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:26:01,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:01,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:01,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:01,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:02,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:02,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963501408] [2021-11-12 23:26:02,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963501408] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:02,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:26:02,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:26:02,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371571314] [2021-11-12 23:26:02,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:02,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:26:02,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:26:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:02,821 INFO L87 Difference]: Start difference. First operand 284 states and 936 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:04,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:04,370 INFO L93 Difference]: Finished difference Result 618 states and 1849 transitions. [2021-11-12 23:26:04,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:26:04,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:04,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:04,372 INFO L225 Difference]: With dead ends: 618 [2021-11-12 23:26:04,372 INFO L226 Difference]: Without dead ends: 618 [2021-11-12 23:26:04,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:26:04,373 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1035.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1172.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:04,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 334 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [3 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 1172.37ms Time] [2021-11-12 23:26:04,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-11-12 23:26:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 282. [2021-11-12 23:26:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.295373665480427) internal successors, (926), 281 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 926 transitions. [2021-11-12 23:26:04,382 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 926 transitions. Word has length 24 [2021-11-12 23:26:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:04,382 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 926 transitions. [2021-11-12 23:26:04,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 926 transitions. [2021-11-12 23:26:04,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:04,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:04,383 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:04,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:04,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:04,584 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:04,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 22619191, now seen corresponding path program 30 times [2021-11-12 23:26:04,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:04,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057247405] [2021-11-12 23:26:04,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:26:04,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:04,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:04,585 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:04,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-11-12 23:26:04,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:26:04,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:04,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:05,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:06,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:06,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057247405] [2021-11-12 23:26:06,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057247405] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:06,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:26:06,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:26:06,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325853704] [2021-11-12 23:26:06,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:06,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:26:06,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:06,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:26:06,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:06,206 INFO L87 Difference]: Start difference. First operand 282 states and 926 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:07,441 INFO L93 Difference]: Finished difference Result 586 states and 1779 transitions. [2021-11-12 23:26:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:26:07,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:07,443 INFO L225 Difference]: With dead ends: 586 [2021-11-12 23:26:07,443 INFO L226 Difference]: Without dead ends: 586 [2021-11-12 23:26:07,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:26:07,443 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 880.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 988.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:07,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 287 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [3 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 988.97ms Time] [2021-11-12 23:26:07,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-12 23:26:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 272. [2021-11-12 23:26:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.2767527675276753) internal successors, (888), 271 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 888 transitions. [2021-11-12 23:26:07,450 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 888 transitions. Word has length 24 [2021-11-12 23:26:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:07,451 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 888 transitions. [2021-11-12 23:26:07,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 888 transitions. [2021-11-12 23:26:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:07,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:07,452 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:07,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2021-11-12 23:26:07,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:07,665 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:07,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2084501753, now seen corresponding path program 31 times [2021-11-12 23:26:07,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:07,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290863014] [2021-11-12 23:26:07,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:26:07,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:07,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:07,666 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:07,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-12 23:26:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:07,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:07,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:08,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:08,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:08,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290863014] [2021-11-12 23:26:08,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290863014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:08,623 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:08,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:26:08,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955635037] [2021-11-12 23:26:08,623 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:08,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:26:08,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:08,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:26:08,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:26:08,624 INFO L87 Difference]: Start difference. First operand 272 states and 888 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:10,074 INFO L93 Difference]: Finished difference Result 406 states and 1252 transitions. [2021-11-12 23:26:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:26:10,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:10,076 INFO L225 Difference]: With dead ends: 406 [2021-11-12 23:26:10,076 INFO L226 Difference]: Without dead ends: 398 [2021-11-12 23:26:10,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:26:10,076 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 948.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1073.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:10,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 497 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [6 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 1073.82ms Time] [2021-11-12 23:26:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-12 23:26:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 278. [2021-11-12 23:26:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.2851985559566788) internal successors, (910), 277 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 910 transitions. [2021-11-12 23:26:10,084 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 910 transitions. Word has length 24 [2021-11-12 23:26:10,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:10,084 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 910 transitions. [2021-11-12 23:26:10,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:10,085 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 910 transitions. [2021-11-12 23:26:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:10,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:10,085 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:10,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:10,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:10,286 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:10,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:10,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1067529138, now seen corresponding path program 31 times [2021-11-12 23:26:10,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:10,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836204876] [2021-11-12 23:26:10,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:26:10,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:10,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:10,288 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:10,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-12 23:26:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:10,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:10,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:10,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:10,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:10,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836204876] [2021-11-12 23:26:10,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836204876] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:10,896 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:10,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:26:10,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705250720] [2021-11-12 23:26:10,896 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:10,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:26:10,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:10,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:26:10,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:26:10,897 INFO L87 Difference]: Start difference. First operand 278 states and 910 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:11,775 INFO L93 Difference]: Finished difference Result 384 states and 1216 transitions. [2021-11-12 23:26:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:26:11,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:11,777 INFO L225 Difference]: With dead ends: 384 [2021-11-12 23:26:11,777 INFO L226 Difference]: Without dead ends: 384 [2021-11-12 23:26:11,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:26:11,777 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 686.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 779.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:11,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 373 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [5 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 779.35ms Time] [2021-11-12 23:26:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-12 23:26:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 284. [2021-11-12 23:26:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.3074204946996466) internal successors, (936), 283 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:11,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 936 transitions. [2021-11-12 23:26:11,783 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 936 transitions. Word has length 24 [2021-11-12 23:26:11,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:11,784 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 936 transitions. [2021-11-12 23:26:11,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:11,784 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 936 transitions. [2021-11-12 23:26:11,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:11,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:11,784 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:11,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:11,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:11,987 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1871411918, now seen corresponding path program 32 times [2021-11-12 23:26:11,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:11,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047455967] [2021-11-12 23:26:11,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:26:11,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:11,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:11,989 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:11,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-11-12 23:26:12,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:26:12,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:12,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:12,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:12,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047455967] [2021-11-12 23:26:12,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047455967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:12,807 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:12,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:12,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599849986] [2021-11-12 23:26:12,807 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:12,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:12,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:12,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:12,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:12,808 INFO L87 Difference]: Start difference. First operand 284 states and 936 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:13,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:13,490 INFO L93 Difference]: Finished difference Result 390 states and 1227 transitions. [2021-11-12 23:26:13,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:26:13,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:13,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:13,492 INFO L225 Difference]: With dead ends: 390 [2021-11-12 23:26:13,492 INFO L226 Difference]: Without dead ends: 384 [2021-11-12 23:26:13,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:26:13,492 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 453.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.76ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 515.96ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:13,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 215 Unknown, 0 Unchecked, 0.76ms Time], IncrementalHoareTripleChecker [11 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 515.96ms Time] [2021-11-12 23:26:13,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-12 23:26:13,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 298. [2021-11-12 23:26:13,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.303030303030303) internal successors, (981), 297 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 981 transitions. [2021-11-12 23:26:13,501 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 981 transitions. Word has length 24 [2021-11-12 23:26:13,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:13,501 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 981 transitions. [2021-11-12 23:26:13,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:13,501 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 981 transitions. [2021-11-12 23:26:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:13,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:13,502 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:13,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:13,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:13,715 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash -72172111, now seen corresponding path program 32 times [2021-11-12 23:26:13,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:13,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646499040] [2021-11-12 23:26:13,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:26:13,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:13,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:13,717 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:13,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-11-12 23:26:13,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:26:13,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:13,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:13,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:14,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:15,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:15,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646499040] [2021-11-12 23:26:15,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646499040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:15,267 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:15,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:15,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728960924] [2021-11-12 23:26:15,267 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:15,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:15,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:15,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:15,268 INFO L87 Difference]: Start difference. First operand 298 states and 981 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:17,162 INFO L93 Difference]: Finished difference Result 422 states and 1331 transitions. [2021-11-12 23:26:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:26:17,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:17,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:17,164 INFO L225 Difference]: With dead ends: 422 [2021-11-12 23:26:17,164 INFO L226 Difference]: Without dead ends: 418 [2021-11-12 23:26:17,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:26:17,164 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1173.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1324.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:17,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 503 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [15 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 1324.56ms Time] [2021-11-12 23:26:17,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-12 23:26:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 306. [2021-11-12 23:26:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.2885245901639344) internal successors, (1003), 305 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:17,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1003 transitions. [2021-11-12 23:26:17,175 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1003 transitions. Word has length 24 [2021-11-12 23:26:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:17,175 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 1003 transitions. [2021-11-12 23:26:17,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1003 transitions. [2021-11-12 23:26:17,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:17,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:17,176 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:17,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:17,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:17,377 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:17,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1509403015, now seen corresponding path program 33 times [2021-11-12 23:26:17,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:17,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505293736] [2021-11-12 23:26:17,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:26:17,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:17,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:17,378 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:17,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-11-12 23:26:17,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:26:17,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:17,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:17,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:17,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:18,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:18,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505293736] [2021-11-12 23:26:18,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505293736] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:18,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:26:18,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:26:18,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774820517] [2021-11-12 23:26:18,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:18,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:26:18,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:26:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:18,581 INFO L87 Difference]: Start difference. First operand 306 states and 1003 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:20,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:20,361 INFO L93 Difference]: Finished difference Result 518 states and 1533 transitions. [2021-11-12 23:26:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:26:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:20,362 INFO L225 Difference]: With dead ends: 518 [2021-11-12 23:26:20,362 INFO L226 Difference]: Without dead ends: 518 [2021-11-12 23:26:20,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:26:20,363 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1220.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1341.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:20,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 324 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [3 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 1341.49ms Time] [2021-11-12 23:26:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-12 23:26:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 298. [2021-11-12 23:26:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.2895622895622894) internal successors, (977), 297 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 977 transitions. [2021-11-12 23:26:20,370 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 977 transitions. Word has length 24 [2021-11-12 23:26:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:20,370 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 977 transitions. [2021-11-12 23:26:20,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 977 transitions. [2021-11-12 23:26:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:20,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:20,371 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:20,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:20,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:20,571 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:20,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash 382006922, now seen corresponding path program 33 times [2021-11-12 23:26:20,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:20,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279731550] [2021-11-12 23:26:20,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:26:20,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:20,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:20,573 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:20,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-11-12 23:26:20,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:26:20,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:20,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:20,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:20,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:21,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:21,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279731550] [2021-11-12 23:26:21,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279731550] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:21,364 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:21,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:21,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238269721] [2021-11-12 23:26:21,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:21,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:21,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:21,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:21,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:21,365 INFO L87 Difference]: Start difference. First operand 298 states and 977 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:22,156 INFO L93 Difference]: Finished difference Result 404 states and 1273 transitions. [2021-11-12 23:26:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:26:22,157 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:22,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:22,158 INFO L225 Difference]: With dead ends: 404 [2021-11-12 23:26:22,158 INFO L226 Difference]: Without dead ends: 404 [2021-11-12 23:26:22,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:26:22,158 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 584.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 664.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:22,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 288 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [10 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 664.01ms Time] [2021-11-12 23:26:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-12 23:26:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 290. [2021-11-12 23:26:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.3044982698961936) internal successors, (955), 289 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 955 transitions. [2021-11-12 23:26:22,164 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 955 transitions. Word has length 24 [2021-11-12 23:26:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:22,164 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 955 transitions. [2021-11-12 23:26:22,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 955 transitions. [2021-11-12 23:26:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:22,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:22,165 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:22,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:22,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:22,365 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:22,366 INFO L85 PathProgramCache]: Analyzing trace with hash 484063899, now seen corresponding path program 34 times [2021-11-12 23:26:22,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:22,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151333504] [2021-11-12 23:26:22,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:26:22,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:22,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:22,367 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:22,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-11-12 23:26:22,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:26:22,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:22,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:22,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:22,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:23,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:23,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151333504] [2021-11-12 23:26:23,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151333504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:23,353 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:23,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:26:23,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307660534] [2021-11-12 23:26:23,353 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:23,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:26:23,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:23,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:26:23,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:26:23,354 INFO L87 Difference]: Start difference. First operand 290 states and 955 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:24,872 INFO L93 Difference]: Finished difference Result 454 states and 1383 transitions. [2021-11-12 23:26:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:26:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:24,874 INFO L225 Difference]: With dead ends: 454 [2021-11-12 23:26:24,874 INFO L226 Difference]: Without dead ends: 446 [2021-11-12 23:26:24,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:26:24,874 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1010.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1157.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:24,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 524 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [5 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 1157.06ms Time] [2021-11-12 23:26:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-12 23:26:24,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 292. [2021-11-12 23:26:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.2989690721649483) internal successors, (960), 291 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 960 transitions. [2021-11-12 23:26:24,883 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 960 transitions. Word has length 24 [2021-11-12 23:26:24,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:24,884 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 960 transitions. [2021-11-12 23:26:24,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:24,884 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 960 transitions. [2021-11-12 23:26:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:24,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:24,885 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:24,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2021-11-12 23:26:25,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:25,095 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:25,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:25,095 INFO L85 PathProgramCache]: Analyzing trace with hash -61669007, now seen corresponding path program 35 times [2021-11-12 23:26:25,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:25,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195975384] [2021-11-12 23:26:25,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:26:25,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:25,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:25,096 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:25,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-11-12 23:26:25,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:26:25,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:25,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:26,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:26,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195975384] [2021-11-12 23:26:26,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195975384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:26,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:26,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:26,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894496293] [2021-11-12 23:26:26,280 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:26,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:26,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:26,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:26,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:26,280 INFO L87 Difference]: Start difference. First operand 292 states and 960 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:27,943 INFO L93 Difference]: Finished difference Result 442 states and 1372 transitions. [2021-11-12 23:26:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:26:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:27,944 INFO L225 Difference]: With dead ends: 442 [2021-11-12 23:26:27,945 INFO L226 Difference]: Without dead ends: 438 [2021-11-12 23:26:27,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:26:27,945 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 111 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1080.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1224.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:27,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 0 Invalid, 534 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [11 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 1224.63ms Time] [2021-11-12 23:26:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-12 23:26:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 300. [2021-11-12 23:26:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.280936454849498) internal successors, (981), 299 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 981 transitions. [2021-11-12 23:26:27,954 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 981 transitions. Word has length 24 [2021-11-12 23:26:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:27,954 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 981 transitions. [2021-11-12 23:26:27,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 981 transitions. [2021-11-12 23:26:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:27,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:27,955 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:27,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:28,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:28,155 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:28,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:28,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1175052025, now seen corresponding path program 36 times [2021-11-12 23:26:28,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:28,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070014811] [2021-11-12 23:26:28,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:26:28,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:28,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:28,157 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:28,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2021-11-12 23:26:28,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:26:28,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:28,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:28,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:28,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:29,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:29,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070014811] [2021-11-12 23:26:29,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070014811] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:29,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:26:29,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:26:29,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378072598] [2021-11-12 23:26:29,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:29,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:26:29,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:29,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:26:29,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:29,474 INFO L87 Difference]: Start difference. First operand 300 states and 981 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:31,190 INFO L93 Difference]: Finished difference Result 540 states and 1575 transitions. [2021-11-12 23:26:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:26:31,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:31,192 INFO L225 Difference]: With dead ends: 540 [2021-11-12 23:26:31,192 INFO L226 Difference]: Without dead ends: 540 [2021-11-12 23:26:31,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:26:31,192 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 934.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1049.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:31,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 269 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [4 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 1049.98ms Time] [2021-11-12 23:26:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-12 23:26:31,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 290. [2021-11-12 23:26:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.3044982698961936) internal successors, (955), 289 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 955 transitions. [2021-11-12 23:26:31,200 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 955 transitions. Word has length 24 [2021-11-12 23:26:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:31,200 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 955 transitions. [2021-11-12 23:26:31,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:31,200 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 955 transitions. [2021-11-12 23:26:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:31,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:31,201 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:31,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:31,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:31,401 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:31,401 INFO L85 PathProgramCache]: Analyzing trace with hash -479783816, now seen corresponding path program 34 times [2021-11-12 23:26:31,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:31,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035899901] [2021-11-12 23:26:31,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:26:31,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:31,403 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:31,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-11-12 23:26:31,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:26:31,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:31,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:32,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:32,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035899901] [2021-11-12 23:26:32,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035899901] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:32,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:26:32,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:26:32,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065995239] [2021-11-12 23:26:32,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:32,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:26:32,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:32,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:26:32,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:26:32,082 INFO L87 Difference]: Start difference. First operand 290 states and 955 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:32,947 INFO L93 Difference]: Finished difference Result 476 states and 1488 transitions. [2021-11-12 23:26:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:26:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:32,949 INFO L225 Difference]: With dead ends: 476 [2021-11-12 23:26:32,949 INFO L226 Difference]: Without dead ends: 476 [2021-11-12 23:26:32,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:26:32,950 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 606.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 688.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:32,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 252 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [5 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 688.78ms Time] [2021-11-12 23:26:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-12 23:26:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 294. [2021-11-12 23:26:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.3208191126279862) internal successors, (973), 293 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 973 transitions. [2021-11-12 23:26:32,956 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 973 transitions. Word has length 24 [2021-11-12 23:26:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:32,957 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 973 transitions. [2021-11-12 23:26:32,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 973 transitions. [2021-11-12 23:26:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:32,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:32,958 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:32,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2021-11-12 23:26:33,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:33,183 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash -103761838, now seen corresponding path program 35 times [2021-11-12 23:26:33,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:33,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134129688] [2021-11-12 23:26:33,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:26:33,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:33,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:33,186 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:33,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-11-12 23:26:33,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:26:33,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:33,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:33,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:33,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:34,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:34,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134129688] [2021-11-12 23:26:34,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134129688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:34,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:34,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:34,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791246097] [2021-11-12 23:26:34,400 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:34,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:34,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:34,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:34,401 INFO L87 Difference]: Start difference. First operand 294 states and 973 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:35,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:35,249 INFO L93 Difference]: Finished difference Result 460 states and 1454 transitions. [2021-11-12 23:26:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:26:35,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:35,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:35,251 INFO L225 Difference]: With dead ends: 460 [2021-11-12 23:26:35,251 INFO L226 Difference]: Without dead ends: 460 [2021-11-12 23:26:35,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:26:35,251 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 687.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 781.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:35,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 328 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [7 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 781.45ms Time] [2021-11-12 23:26:35,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-12 23:26:35,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 298. [2021-11-12 23:26:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.3501683501683504) internal successors, (995), 297 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 995 transitions. [2021-11-12 23:26:35,257 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 995 transitions. Word has length 24 [2021-11-12 23:26:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:35,257 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 995 transitions. [2021-11-12 23:26:35,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 995 transitions. [2021-11-12 23:26:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:35,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:35,258 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:35,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:35,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:35,459 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:35,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1795941120, now seen corresponding path program 36 times [2021-11-12 23:26:35,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:35,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477592790] [2021-11-12 23:26:35,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:26:35,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:35,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:35,461 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:35,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-11-12 23:26:35,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:26:35,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:35,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:35,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:35,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:36,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:36,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477592790] [2021-11-12 23:26:36,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477592790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:36,538 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:36,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:36,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879221499] [2021-11-12 23:26:36,538 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:36,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:36,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:36,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:36,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:36,539 INFO L87 Difference]: Start difference. First operand 298 states and 995 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:37,611 INFO L93 Difference]: Finished difference Result 446 states and 1422 transitions. [2021-11-12 23:26:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:26:37,612 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:37,612 INFO L225 Difference]: With dead ends: 446 [2021-11-12 23:26:37,612 INFO L226 Difference]: Without dead ends: 446 [2021-11-12 23:26:37,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:26:37,613 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 889.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1012.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:37,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 382 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [5 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 1012.26ms Time] [2021-11-12 23:26:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-12 23:26:37,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 290. [2021-11-12 23:26:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.3044982698961936) internal successors, (955), 289 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 955 transitions. [2021-11-12 23:26:37,619 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 955 transitions. Word has length 24 [2021-11-12 23:26:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:37,619 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 955 transitions. [2021-11-12 23:26:37,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 955 transitions. [2021-11-12 23:26:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:37,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:37,621 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:37,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:37,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:37,823 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:37,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:37,825 INFO L85 PathProgramCache]: Analyzing trace with hash 525245834, now seen corresponding path program 37 times [2021-11-12 23:26:37,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:37,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606179262] [2021-11-12 23:26:37,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:26:37,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:37,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:37,826 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:37,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-11-12 23:26:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:37,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:37,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:38,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:38,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:38,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606179262] [2021-11-12 23:26:38,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606179262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:38,819 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:38,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:38,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864509773] [2021-11-12 23:26:38,819 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:38,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:38,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:38,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:38,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:38,820 INFO L87 Difference]: Start difference. First operand 290 states and 955 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:39,780 INFO L93 Difference]: Finished difference Result 462 states and 1451 transitions. [2021-11-12 23:26:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:26:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:39,782 INFO L225 Difference]: With dead ends: 462 [2021-11-12 23:26:39,782 INFO L226 Difference]: Without dead ends: 456 [2021-11-12 23:26:39,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:26:39,783 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 723.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 823.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:39,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 370 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [7 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 823.04ms Time] [2021-11-12 23:26:39,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-12 23:26:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 298. [2021-11-12 23:26:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.3501683501683504) internal successors, (995), 297 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 995 transitions. [2021-11-12 23:26:39,788 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 995 transitions. Word has length 24 [2021-11-12 23:26:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:39,789 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 995 transitions. [2021-11-12 23:26:39,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 995 transitions. [2021-11-12 23:26:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:39,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:39,790 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:39,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:39,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:39,990 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash -46208972, now seen corresponding path program 38 times [2021-11-12 23:26:39,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:39,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169265333] [2021-11-12 23:26:39,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:26:39,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:39,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:39,992 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:39,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-11-12 23:26:40,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:26:40,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:40,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:40,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:40,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:41,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:41,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169265333] [2021-11-12 23:26:41,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169265333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:41,167 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:41,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:41,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879247397] [2021-11-12 23:26:41,167 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:41,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:41,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:41,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:41,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:41,168 INFO L87 Difference]: Start difference. First operand 298 states and 995 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:42,029 INFO L93 Difference]: Finished difference Result 464 states and 1470 transitions. [2021-11-12 23:26:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:26:42,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:42,031 INFO L225 Difference]: With dead ends: 464 [2021-11-12 23:26:42,031 INFO L226 Difference]: Without dead ends: 464 [2021-11-12 23:26:42,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:26:42,031 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 637.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 728.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:42,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 267 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 728.65ms Time] [2021-11-12 23:26:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-12 23:26:42,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 296. [2021-11-12 23:26:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.3559322033898304) internal successors, (990), 295 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 990 transitions. [2021-11-12 23:26:42,040 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 990 transitions. Word has length 24 [2021-11-12 23:26:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:42,041 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 990 transitions. [2021-11-12 23:26:42,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 990 transitions. [2021-11-12 23:26:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:42,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:42,042 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:42,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:42,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:42,257 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:42,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:42,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2133561016, now seen corresponding path program 39 times [2021-11-12 23:26:42,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:42,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001279407] [2021-11-12 23:26:42,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:26:42,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:42,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:42,260 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:42,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2021-11-12 23:26:42,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:26:42,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:42,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:42,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:43,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:43,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001279407] [2021-11-12 23:26:43,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001279407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:43,314 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:43,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:43,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410999724] [2021-11-12 23:26:43,314 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:43,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:43,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:43,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:43,315 INFO L87 Difference]: Start difference. First operand 296 states and 990 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:44,235 INFO L93 Difference]: Finished difference Result 476 states and 1472 transitions. [2021-11-12 23:26:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:26:44,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:44,236 INFO L225 Difference]: With dead ends: 476 [2021-11-12 23:26:44,236 INFO L226 Difference]: Without dead ends: 470 [2021-11-12 23:26:44,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:26:44,237 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 687.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 784.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:44,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 297 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [12 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 784.20ms Time] [2021-11-12 23:26:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-12 23:26:44,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 304. [2021-11-12 23:26:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.3795379537953796) internal successors, (1024), 303 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1024 transitions. [2021-11-12 23:26:44,243 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1024 transitions. Word has length 24 [2021-11-12 23:26:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:44,243 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1024 transitions. [2021-11-12 23:26:44,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1024 transitions. [2021-11-12 23:26:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:44,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:44,244 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:44,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:44,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:44,445 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash 189976987, now seen corresponding path program 37 times [2021-11-12 23:26:44,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:44,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129232028] [2021-11-12 23:26:44,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:26:44,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:44,446 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:44,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2021-11-12 23:26:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:44,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:44,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:45,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:45,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:45,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129232028] [2021-11-12 23:26:45,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129232028] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:45,801 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:45,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:45,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90837671] [2021-11-12 23:26:45,802 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:45,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:45,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:45,802 INFO L87 Difference]: Start difference. First operand 304 states and 1024 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:48,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:48,305 INFO L93 Difference]: Finished difference Result 506 states and 1577 transitions. [2021-11-12 23:26:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:26:48,305 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:48,306 INFO L225 Difference]: With dead ends: 506 [2021-11-12 23:26:48,307 INFO L226 Difference]: Without dead ends: 502 [2021-11-12 23:26:48,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:26:48,307 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 112 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1350.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.19ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1530.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:48,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 0 Invalid, 522 Unknown, 0 Unchecked, 2.19ms Time], IncrementalHoareTripleChecker [26 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 1530.49ms Time] [2021-11-12 23:26:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-12 23:26:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 314. [2021-11-12 23:26:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3833865814696487) internal successors, (1059), 313 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1059 transitions. [2021-11-12 23:26:48,315 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1059 transitions. Word has length 24 [2021-11-12 23:26:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:48,315 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1059 transitions. [2021-11-12 23:26:48,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:48,315 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1059 transitions. [2021-11-12 23:26:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:48,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:48,316 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:48,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:48,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:48,517 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:48,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1771552113, now seen corresponding path program 38 times [2021-11-12 23:26:48,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:48,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601059837] [2021-11-12 23:26:48,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:26:48,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:48,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:48,519 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:48,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2021-11-12 23:26:48,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:26:48,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:48,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:48,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:49,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:49,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:49,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601059837] [2021-11-12 23:26:49,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601059837] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:49,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:26:49,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:26:49,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777119455] [2021-11-12 23:26:49,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:49,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:26:49,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:49,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:26:49,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:49,900 INFO L87 Difference]: Start difference. First operand 314 states and 1059 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:51,537 INFO L93 Difference]: Finished difference Result 572 states and 1722 transitions. [2021-11-12 23:26:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:26:51,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:51,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:51,539 INFO L225 Difference]: With dead ends: 572 [2021-11-12 23:26:51,539 INFO L226 Difference]: Without dead ends: 572 [2021-11-12 23:26:51,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:26:51,540 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1080.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.38ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1215.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:51,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 306 Unknown, 0 Unchecked, 1.38ms Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 1215.57ms Time] [2021-11-12 23:26:51,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-12 23:26:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 314. [2021-11-12 23:26:51,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3833865814696487) internal successors, (1059), 313 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1059 transitions. [2021-11-12 23:26:51,548 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1059 transitions. Word has length 24 [2021-11-12 23:26:51,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:51,549 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1059 transitions. [2021-11-12 23:26:51,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1059 transitions. [2021-11-12 23:26:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:51,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:51,550 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:51,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:51,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:51,750 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:51,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:51,751 INFO L85 PathProgramCache]: Analyzing trace with hash 644156020, now seen corresponding path program 40 times [2021-11-12 23:26:51,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:51,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412986472] [2021-11-12 23:26:51,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:26:51,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:51,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:51,752 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:51,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2021-11-12 23:26:51,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:26:51,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:51,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:52,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:52,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:52,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412986472] [2021-11-12 23:26:52,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412986472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:52,785 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:52,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:52,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593334140] [2021-11-12 23:26:52,786 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:52,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:52,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:52,787 INFO L87 Difference]: Start difference. First operand 314 states and 1059 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:53,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:53,581 INFO L93 Difference]: Finished difference Result 482 states and 1524 transitions. [2021-11-12 23:26:53,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:26:53,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:53,583 INFO L225 Difference]: With dead ends: 482 [2021-11-12 23:26:53,583 INFO L226 Difference]: Without dead ends: 482 [2021-11-12 23:26:53,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:26:53,583 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 594.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 677.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:53,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 250 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [15 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 677.40ms Time] [2021-11-12 23:26:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-12 23:26:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 306. [2021-11-12 23:26:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 305 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1029 transitions. [2021-11-12 23:26:53,591 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1029 transitions. Word has length 24 [2021-11-12 23:26:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:53,592 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 1029 transitions. [2021-11-12 23:26:53,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1029 transitions. [2021-11-12 23:26:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:53,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:53,593 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:53,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2021-11-12 23:26:53,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:53,793 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:53,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:53,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1800917945, now seen corresponding path program 39 times [2021-11-12 23:26:53,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:53,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566280677] [2021-11-12 23:26:53,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:26:53,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:53,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:53,795 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:53,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-11-12 23:26:53,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:26:53,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:53,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:54,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:55,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:55,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566280677] [2021-11-12 23:26:55,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566280677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:55,218 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:55,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:26:55,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652724268] [2021-11-12 23:26:55,218 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:55,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:26:55,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:55,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:26:55,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:55,219 INFO L87 Difference]: Start difference. First operand 306 states and 1029 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:57,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:57,648 INFO L93 Difference]: Finished difference Result 498 states and 1548 transitions. [2021-11-12 23:26:57,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:26:57,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:26:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:57,649 INFO L225 Difference]: With dead ends: 498 [2021-11-12 23:26:57,649 INFO L226 Difference]: Without dead ends: 494 [2021-11-12 23:26:57,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:26:57,650 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 139 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1275.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1449.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:57,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 0 Invalid, 493 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [28 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 1449.62ms Time] [2021-11-12 23:26:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-12 23:26:57,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 310. [2021-11-12 23:26:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.3754045307443366) internal successors, (1043), 309 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1043 transitions. [2021-11-12 23:26:57,657 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1043 transitions. Word has length 24 [2021-11-12 23:26:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:57,658 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1043 transitions. [2021-11-12 23:26:57,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:57,658 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1043 transitions. [2021-11-12 23:26:57,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:26:57,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:57,659 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:57,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:57,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:57,871 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:26:57,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:57,871 INFO L85 PathProgramCache]: Analyzing trace with hash 687534927, now seen corresponding path program 40 times [2021-11-12 23:26:57,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:57,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87127965] [2021-11-12 23:26:57,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:26:57,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:57,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:57,873 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:57,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2021-11-12 23:26:57,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:26:57,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:58,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:26:59,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:59,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87127965] [2021-11-12 23:26:59,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87127965] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:59,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:26:59,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:26:59,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242274786] [2021-11-12 23:26:59,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:59,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:26:59,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:26:59,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:26:59,304 INFO L87 Difference]: Start difference. First operand 310 states and 1043 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:01,011 INFO L93 Difference]: Finished difference Result 546 states and 1654 transitions. [2021-11-12 23:27:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:27:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:01,013 INFO L225 Difference]: With dead ends: 546 [2021-11-12 23:27:01,013 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 23:27:01,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:27:01,013 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1007.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.19ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1129.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:01,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 295 Unknown, 0 Unchecked, 1.19ms Time], IncrementalHoareTripleChecker [5 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 1129.48ms Time] [2021-11-12 23:27:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 23:27:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 308. [2021-11-12 23:27:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.3811074918566777) internal successors, (1038), 307 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1038 transitions. [2021-11-12 23:27:01,020 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1038 transitions. Word has length 24 [2021-11-12 23:27:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:01,020 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 1038 transitions. [2021-11-12 23:27:01,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1038 transitions. [2021-11-12 23:27:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:01,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:01,021 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:01,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:01,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:01,222 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:01,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1616416923, now seen corresponding path program 41 times [2021-11-12 23:27:01,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:01,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774339600] [2021-11-12 23:27:01,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:27:01,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:01,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:01,223 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:01,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2021-11-12 23:27:01,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:27:01,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:01,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:01,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:01,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:02,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:02,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774339600] [2021-11-12 23:27:02,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774339600] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:02,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:27:02,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:27:02,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410356111] [2021-11-12 23:27:02,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:02,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:27:02,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:27:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:02,771 INFO L87 Difference]: Start difference. First operand 308 states and 1038 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:04,499 INFO L93 Difference]: Finished difference Result 606 states and 1774 transitions. [2021-11-12 23:27:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:27:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:04,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:04,501 INFO L225 Difference]: With dead ends: 606 [2021-11-12 23:27:04,501 INFO L226 Difference]: Without dead ends: 606 [2021-11-12 23:27:04,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:27:04,502 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1115.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1252.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:04,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 304 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [3 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 1252.44ms Time] [2021-11-12 23:27:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-12 23:27:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 306. [2021-11-12 23:27:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.3704918032786884) internal successors, (1028), 305 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1028 transitions. [2021-11-12 23:27:04,510 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1028 transitions. Word has length 24 [2021-11-12 23:27:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:04,510 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 1028 transitions. [2021-11-12 23:27:04,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1028 transitions. [2021-11-12 23:27:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:04,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:04,511 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:04,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:04,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:04,712 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:04,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1823243719, now seen corresponding path program 42 times [2021-11-12 23:27:04,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:04,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761863685] [2021-11-12 23:27:04,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:27:04,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:04,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:04,713 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:04,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2021-11-12 23:27:04,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:27:04,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:04,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:05,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:06,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:06,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761863685] [2021-11-12 23:27:06,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761863685] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:06,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:27:06,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:27:06,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992857159] [2021-11-12 23:27:06,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:06,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:27:06,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:27:06,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:06,355 INFO L87 Difference]: Start difference. First operand 306 states and 1028 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:08,086 INFO L93 Difference]: Finished difference Result 576 states and 1708 transitions. [2021-11-12 23:27:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:27:08,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:08,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:08,088 INFO L225 Difference]: With dead ends: 576 [2021-11-12 23:27:08,088 INFO L226 Difference]: Without dead ends: 576 [2021-11-12 23:27:08,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:27:08,088 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1040.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1168.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:08,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 309 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [3 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 1168.11ms Time] [2021-11-12 23:27:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-12 23:27:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 296. [2021-11-12 23:27:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.3559322033898304) internal successors, (990), 295 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 990 transitions. [2021-11-12 23:27:08,096 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 990 transitions. Word has length 24 [2021-11-12 23:27:08,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:08,096 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 990 transitions. [2021-11-12 23:27:08,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 990 transitions. [2021-11-12 23:27:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:08,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:08,097 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:08,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:08,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:08,298 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:08,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:08,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1026876408, now seen corresponding path program 41 times [2021-11-12 23:27:08,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:08,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879694557] [2021-11-12 23:27:08,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:27:08,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:08,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:08,299 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:08,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2021-11-12 23:27:08,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:27:08,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:08,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:08,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:08,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:09,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:09,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879694557] [2021-11-12 23:27:09,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879694557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:09,536 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:09,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:27:09,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960121350] [2021-11-12 23:27:09,536 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:09,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:27:09,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:27:09,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:09,537 INFO L87 Difference]: Start difference. First operand 296 states and 990 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:10,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:10,487 INFO L93 Difference]: Finished difference Result 476 states and 1526 transitions. [2021-11-12 23:27:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:10,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:10,489 INFO L225 Difference]: With dead ends: 476 [2021-11-12 23:27:10,489 INFO L226 Difference]: Without dead ends: 476 [2021-11-12 23:27:10,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:27:10,489 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 775.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 884.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:10,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 352 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [10 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 884.89ms Time] [2021-11-12 23:27:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-12 23:27:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 300. [2021-11-12 23:27:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.3846153846153846) internal successors, (1012), 299 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 1012 transitions. [2021-11-12 23:27:10,496 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 1012 transitions. Word has length 24 [2021-11-12 23:27:10,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:10,496 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 1012 transitions. [2021-11-12 23:27:10,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 1012 transitions. [2021-11-12 23:27:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:10,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:10,497 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:10,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:10,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:10,699 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:10,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:10,699 INFO L85 PathProgramCache]: Analyzing trace with hash 108926218, now seen corresponding path program 42 times [2021-11-12 23:27:10,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:10,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467545363] [2021-11-12 23:27:10,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:27:10,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:10,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:10,700 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:10,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2021-11-12 23:27:10,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:27:10,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:10,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:10,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:11,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:11,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:11,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467545363] [2021-11-12 23:27:11,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467545363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:11,860 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:11,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:27:11,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975557461] [2021-11-12 23:27:11,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:11,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:27:11,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:11,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:27:11,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:11,862 INFO L87 Difference]: Start difference. First operand 300 states and 1012 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:13,051 INFO L93 Difference]: Finished difference Result 462 states and 1502 transitions. [2021-11-12 23:27:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:13,053 INFO L225 Difference]: With dead ends: 462 [2021-11-12 23:27:13,053 INFO L226 Difference]: Without dead ends: 462 [2021-11-12 23:27:13,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:27:13,053 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 990.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1130.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:13,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 447 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [7 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 1130.72ms Time] [2021-11-12 23:27:13,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-12 23:27:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 292. [2021-11-12 23:27:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.3195876288659796) internal successors, (966), 291 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 966 transitions. [2021-11-12 23:27:13,059 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 966 transitions. Word has length 24 [2021-11-12 23:27:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:13,059 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 966 transitions. [2021-11-12 23:27:13,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 966 transitions. [2021-11-12 23:27:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:13,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:13,060 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:13,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:13,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:13,261 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:13,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1276664903, now seen corresponding path program 43 times [2021-11-12 23:27:13,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:13,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231487383] [2021-11-12 23:27:13,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:27:13,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:13,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:13,262 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:13,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2021-11-12 23:27:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:13,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:13,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:13,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:13,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:13,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231487383] [2021-11-12 23:27:13,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231487383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:13,954 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:13,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:27:13,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743993314] [2021-11-12 23:27:13,954 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:13,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:27:13,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:13,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:27:13,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:27:13,955 INFO L87 Difference]: Start difference. First operand 292 states and 966 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:15,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:15,170 INFO L93 Difference]: Finished difference Result 372 states and 1164 transitions. [2021-11-12 23:27:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:27:15,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:15,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:15,172 INFO L225 Difference]: With dead ends: 372 [2021-11-12 23:27:15,172 INFO L226 Difference]: Without dead ends: 364 [2021-11-12 23:27:15,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:27:15,172 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 722.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 829.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:15,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 367 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [3 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 829.89ms Time] [2021-11-12 23:27:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-12 23:27:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 294. [2021-11-12 23:27:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.3139931740614332) internal successors, (971), 293 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 971 transitions. [2021-11-12 23:27:15,177 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 971 transitions. Word has length 24 [2021-11-12 23:27:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:15,178 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 971 transitions. [2021-11-12 23:27:15,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:15,178 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 971 transitions. [2021-11-12 23:27:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:15,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:15,179 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:15,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:15,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:15,379 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:15,380 INFO L85 PathProgramCache]: Analyzing trace with hash 730931997, now seen corresponding path program 44 times [2021-11-12 23:27:15,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:15,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161572910] [2021-11-12 23:27:15,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:27:15,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:15,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:15,381 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:15,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2021-11-12 23:27:15,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:27:15,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:15,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:15,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:15,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:16,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:16,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161572910] [2021-11-12 23:27:16,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161572910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:16,321 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:16,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:27:16,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672607891] [2021-11-12 23:27:16,321 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:16,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:27:16,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:16,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:27:16,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:16,322 INFO L87 Difference]: Start difference. First operand 294 states and 971 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:17,851 INFO L93 Difference]: Finished difference Result 376 states and 1178 transitions. [2021-11-12 23:27:17,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:27:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:17,852 INFO L225 Difference]: With dead ends: 376 [2021-11-12 23:27:17,852 INFO L226 Difference]: Without dead ends: 372 [2021-11-12 23:27:17,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:27:17,853 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 931.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1069.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:17,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 525 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [7 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1069.53ms Time] [2021-11-12 23:27:17,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-12 23:27:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 302. [2021-11-12 23:27:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.2956810631229234) internal successors, (992), 301 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 992 transitions. [2021-11-12 23:27:17,858 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 992 transitions. Word has length 24 [2021-11-12 23:27:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:17,859 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 992 transitions. [2021-11-12 23:27:17,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 992 transitions. [2021-11-12 23:27:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:17,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:17,859 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:17,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:18,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:18,060 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:18,060 INFO L85 PathProgramCache]: Analyzing trace with hash -382451021, now seen corresponding path program 45 times [2021-11-12 23:27:18,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:18,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712250737] [2021-11-12 23:27:18,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:27:18,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:18,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:18,062 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:18,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2021-11-12 23:27:18,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:27:18,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:18,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:18,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:18,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:19,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:19,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712250737] [2021-11-12 23:27:19,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712250737] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:19,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:27:19,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:27:19,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792666438] [2021-11-12 23:27:19,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:19,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:27:19,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:19,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:27:19,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:19,098 INFO L87 Difference]: Start difference. First operand 302 states and 992 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:20,362 INFO L93 Difference]: Finished difference Result 448 states and 1325 transitions. [2021-11-12 23:27:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:27:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:20,363 INFO L225 Difference]: With dead ends: 448 [2021-11-12 23:27:20,363 INFO L226 Difference]: Without dead ends: 448 [2021-11-12 23:27:20,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:27:20,364 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 803.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 909.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:20,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 308 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [4 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 909.16ms Time] [2021-11-12 23:27:20,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-12 23:27:20,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 292. [2021-11-12 23:27:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.3195876288659796) internal successors, (966), 291 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 966 transitions. [2021-11-12 23:27:20,370 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 966 transitions. Word has length 24 [2021-11-12 23:27:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:20,370 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 966 transitions. [2021-11-12 23:27:20,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 966 transitions. [2021-11-12 23:27:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:20,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:20,371 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:20,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:20,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:20,571 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:20,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:20,571 INFO L85 PathProgramCache]: Analyzing trace with hash 125234745, now seen corresponding path program 46 times [2021-11-12 23:27:20,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:20,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273594139] [2021-11-12 23:27:20,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:27:20,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:20,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:20,573 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:20,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-11-12 23:27:20,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:27:20,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:20,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:20,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:21,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:21,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:21,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273594139] [2021-11-12 23:27:21,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273594139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:21,371 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:21,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:27:21,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480646253] [2021-11-12 23:27:21,371 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:21,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:27:21,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:21,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:27:21,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:21,375 INFO L87 Difference]: Start difference. First operand 292 states and 966 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:22,624 INFO L93 Difference]: Finished difference Result 372 states and 1185 transitions. [2021-11-12 23:27:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:27:22,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:22,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:22,626 INFO L225 Difference]: With dead ends: 372 [2021-11-12 23:27:22,626 INFO L226 Difference]: Without dead ends: 368 [2021-11-12 23:27:22,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:27:22,626 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 672.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 762.96ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:22,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 380 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [13 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 762.96ms Time] [2021-11-12 23:27:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-12 23:27:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 304. [2021-11-12 23:27:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.297029702970297) internal successors, (999), 303 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 999 transitions. [2021-11-12 23:27:22,632 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 999 transitions. Word has length 24 [2021-11-12 23:27:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:22,632 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 999 transitions. [2021-11-12 23:27:22,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 999 transitions. [2021-11-12 23:27:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:22,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:22,634 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:22,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:22,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:22,834 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:22,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:22,835 INFO L85 PathProgramCache]: Analyzing trace with hash -988148273, now seen corresponding path program 47 times [2021-11-12 23:27:22,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:22,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346408201] [2021-11-12 23:27:22,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:27:22,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:22,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:22,836 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:22,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2021-11-12 23:27:22,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:27:22,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:22,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:23,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:23,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:23,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346408201] [2021-11-12 23:27:23,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346408201] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:23,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:27:23,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:27:23,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828801552] [2021-11-12 23:27:23,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:23,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:27:23,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:23,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:27:23,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:23,733 INFO L87 Difference]: Start difference. First operand 304 states and 999 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:24,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:24,991 INFO L93 Difference]: Finished difference Result 440 states and 1336 transitions. [2021-11-12 23:27:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:27:24,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:24,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:24,992 INFO L225 Difference]: With dead ends: 440 [2021-11-12 23:27:24,992 INFO L226 Difference]: Without dead ends: 440 [2021-11-12 23:27:24,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:27:24,993 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 726.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 823.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:24,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 272 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [10 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 823.40ms Time] [2021-11-12 23:27:24,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-12 23:27:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 302. [2021-11-12 23:27:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.302325581395349) internal successors, (994), 301 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 994 transitions. [2021-11-12 23:27:25,005 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 994 transitions. Word has length 24 [2021-11-12 23:27:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:25,005 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 994 transitions. [2021-11-12 23:27:25,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 994 transitions. [2021-11-12 23:27:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:25,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:25,006 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:25,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2021-11-12 23:27:25,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:25,207 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:25,207 INFO L85 PathProgramCache]: Analyzing trace with hash -426660711, now seen corresponding path program 48 times [2021-11-12 23:27:25,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:25,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77268745] [2021-11-12 23:27:25,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:27:25,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:25,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:25,209 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:25,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2021-11-12 23:27:25,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:27:25,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:25,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:25,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:25,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:25,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77268745] [2021-11-12 23:27:25,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77268745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:25,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [978693795] [2021-11-12 23:27:25,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:27:25,983 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:25,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:27:25,985 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:27:25,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2021-11-12 23:27:26,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:27:26,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:26,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:26,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:26,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:26,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [978693795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:26,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893485513] [2021-11-12 23:27:26,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:27:26,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:27:26,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:26,763 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:27:26,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-12 23:27:26,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:27:26,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:26,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:27:26,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:27,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:27,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893485513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:27,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:27:27,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-12 23:27:27,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776961207] [2021-11-12 23:27:27,759 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:27:27,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:27:27,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:27:27,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:27:27,759 INFO L87 Difference]: Start difference. First operand 302 states and 994 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:29,271 INFO L93 Difference]: Finished difference Result 382 states and 1197 transitions. [2021-11-12 23:27:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:27:29,272 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:29,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:29,272 INFO L225 Difference]: With dead ends: 382 [2021-11-12 23:27:29,272 INFO L226 Difference]: Without dead ends: 382 [2021-11-12 23:27:29,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:27:29,273 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1099.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.34ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1248.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:29,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 784 Unknown, 0 Unchecked, 2.34ms Time], IncrementalHoareTripleChecker [6 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 1248.57ms Time] [2021-11-12 23:27:29,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-12 23:27:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 298. [2021-11-12 23:27:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.303030303030303) internal successors, (981), 297 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 981 transitions. [2021-11-12 23:27:29,278 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 981 transitions. Word has length 24 [2021-11-12 23:27:29,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:29,279 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 981 transitions. [2021-11-12 23:27:29,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:29,279 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 981 transitions. [2021-11-12 23:27:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:29,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:29,280 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:29,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (102)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:29,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-11-12 23:27:29,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:29,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:29,881 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:29,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:29,881 INFO L85 PathProgramCache]: Analyzing trace with hash -572981092, now seen corresponding path program 43 times [2021-11-12 23:27:29,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:29,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051759304] [2021-11-12 23:27:29,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:27:29,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:29,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:29,882 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:29,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2021-11-12 23:27:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:30,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:30,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:30,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051759304] [2021-11-12 23:27:30,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051759304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:30,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1655677907] [2021-11-12 23:27:30,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:27:30,463 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:30,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:27:30,464 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:27:30,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2021-11-12 23:27:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:30,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:30,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:31,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1655677907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:31,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273304279] [2021-11-12 23:27:31,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:27:31,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:27:31,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:31,026 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:27:31,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-12 23:27:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:31,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:31,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:31,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273304279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:31,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:27:31,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 10 [2021-11-12 23:27:31,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118325366] [2021-11-12 23:27:31,423 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:27:31,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:27:31,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:31,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:27:31,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:27:31,424 INFO L87 Difference]: Start difference. First operand 298 states and 981 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:32,298 INFO L93 Difference]: Finished difference Result 426 states and 1358 transitions. [2021-11-12 23:27:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:32,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:32,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:32,299 INFO L225 Difference]: With dead ends: 426 [2021-11-12 23:27:32,299 INFO L226 Difference]: Without dead ends: 426 [2021-11-12 23:27:32,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:32,300 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 712.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.28ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 817.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:32,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 383 Unknown, 0 Unchecked, 1.28ms Time], IncrementalHoareTripleChecker [3 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 817.74ms Time] [2021-11-12 23:27:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-12 23:27:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 296. [2021-11-12 23:27:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.298305084745763) internal successors, (973), 295 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 973 transitions. [2021-11-12 23:27:32,305 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 973 transitions. Word has length 24 [2021-11-12 23:27:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:32,306 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 973 transitions. [2021-11-12 23:27:32,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 973 transitions. [2021-11-12 23:27:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:32,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:32,307 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:32,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:32,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:32,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (105)] Ended with exit code 0 [2021-11-12 23:27:32,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:32,911 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:32,911 INFO L85 PathProgramCache]: Analyzing trace with hash -196959114, now seen corresponding path program 44 times [2021-11-12 23:27:32,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:32,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373232413] [2021-11-12 23:27:32,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:27:32,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:32,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:32,913 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:32,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2021-11-12 23:27:33,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:27:33,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:33,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:33,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:33,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:34,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:34,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373232413] [2021-11-12 23:27:34,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373232413] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:34,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:27:34,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:27:34,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999594535] [2021-11-12 23:27:34,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:34,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:27:34,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:27:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:34,021 INFO L87 Difference]: Start difference. First operand 296 states and 973 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:34,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:34,590 INFO L93 Difference]: Finished difference Result 418 states and 1320 transitions. [2021-11-12 23:27:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:34,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:34,592 INFO L225 Difference]: With dead ends: 418 [2021-11-12 23:27:34,592 INFO L226 Difference]: Without dead ends: 418 [2021-11-12 23:27:34,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:34,592 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 433.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.85ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 497.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:34,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 238 Unknown, 0 Unchecked, 0.85ms Time], IncrementalHoareTripleChecker [4 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 497.80ms Time] [2021-11-12 23:27:34,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-12 23:27:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 296. [2021-11-12 23:27:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.298305084745763) internal successors, (973), 295 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 973 transitions. [2021-11-12 23:27:34,599 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 973 transitions. Word has length 24 [2021-11-12 23:27:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:34,599 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 973 transitions. [2021-11-12 23:27:34,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 973 transitions. [2021-11-12 23:27:34,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:34,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:34,601 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:34,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:34,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:34,803 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:34,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1889138396, now seen corresponding path program 45 times [2021-11-12 23:27:34,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:34,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997124389] [2021-11-12 23:27:34,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:27:34,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:34,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:34,805 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:34,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-11-12 23:27:34,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:27:34,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:34,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:34,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:35,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:35,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:35,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997124389] [2021-11-12 23:27:35,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997124389] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:35,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:27:35,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:27:35,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89754745] [2021-11-12 23:27:35,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:35,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:27:35,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:35,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:27:35,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:35,839 INFO L87 Difference]: Start difference. First operand 296 states and 973 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:36,458 INFO L93 Difference]: Finished difference Result 408 states and 1306 transitions. [2021-11-12 23:27:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:36,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:36,460 INFO L225 Difference]: With dead ends: 408 [2021-11-12 23:27:36,460 INFO L226 Difference]: Without dead ends: 408 [2021-11-12 23:27:36,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:36,460 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 482.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.93ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 554.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:36,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 256 Unknown, 0 Unchecked, 0.93ms Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 554.87ms Time] [2021-11-12 23:27:36,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-12 23:27:36,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 278. [2021-11-12 23:27:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.259927797833935) internal successors, (903), 277 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 903 transitions. [2021-11-12 23:27:36,467 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 903 transitions. Word has length 24 [2021-11-12 23:27:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:36,468 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 903 transitions. [2021-11-12 23:27:36,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 903 transitions. [2021-11-12 23:27:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:36,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:36,469 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:36,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:36,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:36,669 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:36,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1576403282, now seen corresponding path program 46 times [2021-11-12 23:27:36,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:36,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612882293] [2021-11-12 23:27:36,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:27:36,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:36,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:36,671 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:36,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2021-11-12 23:27:36,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:27:36,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:36,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:36,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:37,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:37,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:37,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612882293] [2021-11-12 23:27:37,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612882293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:37,628 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:37,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:27:37,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610747366] [2021-11-12 23:27:37,628 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:37,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:27:37,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:37,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:27:37,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:37,628 INFO L87 Difference]: Start difference. First operand 278 states and 903 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:38,642 INFO L93 Difference]: Finished difference Result 428 states and 1334 transitions. [2021-11-12 23:27:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:38,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:38,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:38,644 INFO L225 Difference]: With dead ends: 428 [2021-11-12 23:27:38,644 INFO L226 Difference]: Without dead ends: 428 [2021-11-12 23:27:38,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:38,645 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 820.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 941.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:38,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 340 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [6 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 941.55ms Time] [2021-11-12 23:27:38,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-12 23:27:38,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 286. [2021-11-12 23:27:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.3087719298245615) internal successors, (943), 285 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 943 transitions. [2021-11-12 23:27:38,651 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 943 transitions. Word has length 24 [2021-11-12 23:27:38,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:38,651 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 943 transitions. [2021-11-12 23:27:38,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:38,652 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 943 transitions. [2021-11-12 23:27:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:38,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:38,653 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:38,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:38,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:38,866 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:38,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:38,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1026384732, now seen corresponding path program 47 times [2021-11-12 23:27:38,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:38,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292353939] [2021-11-12 23:27:38,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:27:38,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:38,868 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:38,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2021-11-12 23:27:39,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:27:39,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:39,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:39,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:39,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:39,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:39,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292353939] [2021-11-12 23:27:39,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292353939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:39,800 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:39,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:27:39,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604849924] [2021-11-12 23:27:39,801 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:39,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:27:39,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:39,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:27:39,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:39,801 INFO L87 Difference]: Start difference. First operand 286 states and 943 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:40,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:40,692 INFO L93 Difference]: Finished difference Result 414 states and 1302 transitions. [2021-11-12 23:27:40,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:40,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:40,693 INFO L225 Difference]: With dead ends: 414 [2021-11-12 23:27:40,693 INFO L226 Difference]: Without dead ends: 414 [2021-11-12 23:27:40,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:40,694 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 727.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.17ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 833.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:40,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 310 Unknown, 0 Unchecked, 1.17ms Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 833.04ms Time] [2021-11-12 23:27:40,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-12 23:27:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 282. [2021-11-12 23:27:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.2775800711743774) internal successors, (921), 281 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 921 transitions. [2021-11-12 23:27:40,700 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 921 transitions. Word has length 24 [2021-11-12 23:27:40,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:40,700 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 921 transitions. [2021-11-12 23:27:40,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 921 transitions. [2021-11-12 23:27:40,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:40,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:40,701 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:40,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:40,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:40,901 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:40,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:40,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2129745586, now seen corresponding path program 48 times [2021-11-12 23:27:40,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:40,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134666280] [2021-11-12 23:27:40,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:27:40,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:40,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:40,903 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:40,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2021-11-12 23:27:41,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:27:41,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:41,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:41,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:41,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:41,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:41,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134666280] [2021-11-12 23:27:41,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134666280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:41,645 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:41,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:27:41,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664101664] [2021-11-12 23:27:41,645 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:41,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:27:41,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:41,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:27:41,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:27:41,646 INFO L87 Difference]: Start difference. First operand 282 states and 921 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:42,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:42,509 INFO L93 Difference]: Finished difference Result 384 states and 1220 transitions. [2021-11-12 23:27:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:42,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:42,511 INFO L225 Difference]: With dead ends: 384 [2021-11-12 23:27:42,511 INFO L226 Difference]: Without dead ends: 384 [2021-11-12 23:27:42,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:42,511 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 681.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.17ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 776.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:42,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 309 Unknown, 0 Unchecked, 1.17ms Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 776.54ms Time] [2021-11-12 23:27:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-12 23:27:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 284. [2021-11-12 23:27:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.2791519434628977) internal successors, (928), 283 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 928 transitions. [2021-11-12 23:27:42,517 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 928 transitions. Word has length 24 [2021-11-12 23:27:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:42,517 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 928 transitions. [2021-11-12 23:27:42,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 928 transitions. [2021-11-12 23:27:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:42,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:42,518 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:42,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (111)] Ended with exit code 0 [2021-11-12 23:27:42,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:42,718 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:42,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:42,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1071499794, now seen corresponding path program 49 times [2021-11-12 23:27:42,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:42,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661277282] [2021-11-12 23:27:42,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:27:42,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:42,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:42,720 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:42,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2021-11-12 23:27:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:42,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:43,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:43,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:43,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661277282] [2021-11-12 23:27:43,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661277282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:43,916 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:43,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:27:43,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508846482] [2021-11-12 23:27:43,916 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:43,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:27:43,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:27:43,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:43,917 INFO L87 Difference]: Start difference. First operand 284 states and 928 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:45,057 INFO L93 Difference]: Finished difference Result 486 states and 1510 transitions. [2021-11-12 23:27:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:45,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:45,060 INFO L225 Difference]: With dead ends: 486 [2021-11-12 23:27:45,060 INFO L226 Difference]: Without dead ends: 480 [2021-11-12 23:27:45,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:27:45,060 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 134 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 853.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 978.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:45,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 0 Invalid, 310 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [13 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 978.36ms Time] [2021-11-12 23:27:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-12 23:27:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 302. [2021-11-12 23:27:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.3255813953488373) internal successors, (1001), 301 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1001 transitions. [2021-11-12 23:27:45,067 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1001 transitions. Word has length 24 [2021-11-12 23:27:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:45,068 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1001 transitions. [2021-11-12 23:27:45,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1001 transitions. [2021-11-12 23:27:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:45,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:45,069 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:45,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:45,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:45,269 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:45,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1642954600, now seen corresponding path program 50 times [2021-11-12 23:27:45,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:45,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806197867] [2021-11-12 23:27:45,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:27:45,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:45,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:45,271 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:45,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2021-11-12 23:27:45,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:27:45,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:45,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:45,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:45,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:46,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:46,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806197867] [2021-11-12 23:27:46,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806197867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:46,477 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:46,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:27:46,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716631835] [2021-11-12 23:27:46,478 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:46,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:27:46,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:46,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:27:46,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:46,479 INFO L87 Difference]: Start difference. First operand 302 states and 1001 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:47,512 INFO L93 Difference]: Finished difference Result 494 states and 1540 transitions. [2021-11-12 23:27:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:47,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:47,514 INFO L225 Difference]: With dead ends: 494 [2021-11-12 23:27:47,514 INFO L226 Difference]: Without dead ends: 494 [2021-11-12 23:27:47,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:27:47,514 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 795.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 898.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:47,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 330 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [11 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 898.07ms Time] [2021-11-12 23:27:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-12 23:27:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 300. [2021-11-12 23:27:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.331103678929766) internal successors, (996), 299 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 996 transitions. [2021-11-12 23:27:47,521 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 996 transitions. Word has length 24 [2021-11-12 23:27:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:47,521 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 996 transitions. [2021-11-12 23:27:47,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 996 transitions. [2021-11-12 23:27:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:47,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:47,522 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:47,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (113)] Ended with exit code 0 [2021-11-12 23:27:47,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:47,723 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:47,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash 536815388, now seen corresponding path program 51 times [2021-11-12 23:27:47,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:47,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138715243] [2021-11-12 23:27:47,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:27:47,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:47,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:47,724 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:47,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2021-11-12 23:27:47,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:27:47,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:47,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:47,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:48,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:48,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:48,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138715243] [2021-11-12 23:27:48,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138715243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:48,849 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:48,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:27:48,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306802139] [2021-11-12 23:27:48,849 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:48,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:27:48,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:48,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:27:48,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:48,850 INFO L87 Difference]: Start difference. First operand 300 states and 996 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:49,933 INFO L93 Difference]: Finished difference Result 466 states and 1469 transitions. [2021-11-12 23:27:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:49,935 INFO L225 Difference]: With dead ends: 466 [2021-11-12 23:27:49,935 INFO L226 Difference]: Without dead ends: 460 [2021-11-12 23:27:49,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:27:49,935 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 815.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.46ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 927.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:49,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 341 Unknown, 0 Unchecked, 1.46ms Time], IncrementalHoareTripleChecker [11 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 927.56ms Time] [2021-11-12 23:27:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-12 23:27:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 308. [2021-11-12 23:27:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.3550488599348536) internal successors, (1030), 307 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1030 transitions. [2021-11-12 23:27:49,942 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1030 transitions. Word has length 24 [2021-11-12 23:27:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:49,942 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 1030 transitions. [2021-11-12 23:27:49,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:49,943 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1030 transitions. [2021-11-12 23:27:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:49,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:49,943 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:49,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (114)] Ended with exit code 0 [2021-11-12 23:27:50,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:50,144 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:50,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1406768641, now seen corresponding path program 49 times [2021-11-12 23:27:50,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:50,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976671515] [2021-11-12 23:27:50,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:27:50,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:50,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:50,146 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:50,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2021-11-12 23:27:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:50,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:50,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:51,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:51,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976671515] [2021-11-12 23:27:51,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976671515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:51,551 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:51,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:27:51,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686194125] [2021-11-12 23:27:51,551 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:51,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:27:51,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:51,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:27:51,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:51,552 INFO L87 Difference]: Start difference. First operand 308 states and 1030 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:53,680 INFO L93 Difference]: Finished difference Result 482 states and 1544 transitions. [2021-11-12 23:27:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:27:53,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:53,681 INFO L225 Difference]: With dead ends: 482 [2021-11-12 23:27:53,681 INFO L226 Difference]: Without dead ends: 472 [2021-11-12 23:27:53,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:27:53,682 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1161.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.10ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1317.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:53,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 473 Unknown, 0 Unchecked, 2.10ms Time], IncrementalHoareTripleChecker [24 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 1317.63ms Time] [2021-11-12 23:27:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-12 23:27:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 324. [2021-11-12 23:27:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.362229102167183) internal successors, (1086), 323 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1086 transitions. [2021-11-12 23:27:53,688 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1086 transitions. Word has length 24 [2021-11-12 23:27:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:53,688 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1086 transitions. [2021-11-12 23:27:53,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1086 transitions. [2021-11-12 23:27:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:53,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:53,689 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:53,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (115)] Ended with exit code 0 [2021-11-12 23:27:53,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:53,890 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:53,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:53,890 INFO L85 PathProgramCache]: Analyzing trace with hash 174806485, now seen corresponding path program 50 times [2021-11-12 23:27:53,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:53,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825366603] [2021-11-12 23:27:53,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:27:53,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:53,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:53,892 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:53,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2021-11-12 23:27:54,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:27:54,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:54,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:54,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:55,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:55,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825366603] [2021-11-12 23:27:55,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825366603] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:55,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:27:55,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:27:55,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233646484] [2021-11-12 23:27:55,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:55,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:27:55,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:55,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:27:55,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:55,276 INFO L87 Difference]: Start difference. First operand 324 states and 1086 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:56,836 INFO L93 Difference]: Finished difference Result 524 states and 1644 transitions. [2021-11-12 23:27:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:27:56,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:56,838 INFO L225 Difference]: With dead ends: 524 [2021-11-12 23:27:56,838 INFO L226 Difference]: Without dead ends: 524 [2021-11-12 23:27:56,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:27:56,839 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1061.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1192.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:56,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 266 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [5 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1192.81ms Time] [2021-11-12 23:27:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-12 23:27:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 324. [2021-11-12 23:27:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.362229102167183) internal successors, (1086), 323 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1086 transitions. [2021-11-12 23:27:56,845 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1086 transitions. Word has length 24 [2021-11-12 23:27:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:56,846 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1086 transitions. [2021-11-12 23:27:56,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1086 transitions. [2021-11-12 23:27:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:56,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:56,846 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:56,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:57,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:57,047 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:57,047 INFO L85 PathProgramCache]: Analyzing trace with hash -952589608, now seen corresponding path program 52 times [2021-11-12 23:27:57,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:57,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518669307] [2021-11-12 23:27:57,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:27:57,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:57,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:57,049 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:57,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2021-11-12 23:27:57,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:27:57,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:57,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:57,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:58,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:58,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518669307] [2021-11-12 23:27:58,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518669307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:58,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:58,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:27:58,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052481513] [2021-11-12 23:27:58,109 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:58,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:27:58,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:58,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:27:58,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:27:58,110 INFO L87 Difference]: Start difference. First operand 324 states and 1086 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:58,968 INFO L93 Difference]: Finished difference Result 482 states and 1543 transitions. [2021-11-12 23:27:58,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:27:58,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:27:58,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:58,970 INFO L225 Difference]: With dead ends: 482 [2021-11-12 23:27:58,970 INFO L226 Difference]: Without dead ends: 482 [2021-11-12 23:27:58,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:27:58,970 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 645.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.11ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 735.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:58,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 239 Unknown, 0 Unchecked, 1.11ms Time], IncrementalHoareTripleChecker [16 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 735.63ms Time] [2021-11-12 23:27:58,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-12 23:27:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 320. [2021-11-12 23:27:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.3699059561128526) internal successors, (1075), 319 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1075 transitions. [2021-11-12 23:27:58,977 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1075 transitions. Word has length 24 [2021-11-12 23:27:58,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:58,977 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1075 transitions. [2021-11-12 23:27:58,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:58,977 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1075 transitions. [2021-11-12 23:27:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:27:58,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:58,978 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:58,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:59,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:59,179 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:27:59,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:59,179 INFO L85 PathProgramCache]: Analyzing trace with hash 204172317, now seen corresponding path program 51 times [2021-11-12 23:27:59,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:59,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533076066] [2021-11-12 23:27:59,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:27:59,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:59,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:59,180 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:59,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2021-11-12 23:27:59,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:27:59,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:59,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:27:59,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:27:59,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:00,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:00,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533076066] [2021-11-12 23:28:00,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533076066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:00,594 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:00,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:28:00,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981408217] [2021-11-12 23:28:00,594 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:00,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:28:00,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:00,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:28:00,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:00,595 INFO L87 Difference]: Start difference. First operand 320 states and 1075 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:03,142 INFO L93 Difference]: Finished difference Result 488 states and 1571 transitions. [2021-11-12 23:28:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:28:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:03,144 INFO L225 Difference]: With dead ends: 488 [2021-11-12 23:28:03,144 INFO L226 Difference]: Without dead ends: 484 [2021-11-12 23:28:03,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:28:03,144 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1317.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1508.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:03,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 495 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [22 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 1508.13ms Time] [2021-11-12 23:28:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-12 23:28:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 324. [2021-11-12 23:28:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.371517027863777) internal successors, (1089), 323 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1089 transitions. [2021-11-12 23:28:03,155 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1089 transitions. Word has length 24 [2021-11-12 23:28:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:03,156 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1089 transitions. [2021-11-12 23:28:03,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1089 transitions. [2021-11-12 23:28:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:03,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:03,157 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:03,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:03,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:03,373 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash -909210701, now seen corresponding path program 52 times [2021-11-12 23:28:03,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:03,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333546492] [2021-11-12 23:28:03,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:28:03,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:03,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:03,374 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:03,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2021-11-12 23:28:03,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:28:03,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:03,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:03,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:04,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:04,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:04,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333546492] [2021-11-12 23:28:04,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333546492] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:28:04,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:28:04,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:28:04,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205636393] [2021-11-12 23:28:04,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:04,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:28:04,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:04,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:28:04,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:04,785 INFO L87 Difference]: Start difference. First operand 324 states and 1089 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:07,406 INFO L93 Difference]: Finished difference Result 704 states and 2048 transitions. [2021-11-12 23:28:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:28:07,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:07,409 INFO L225 Difference]: With dead ends: 704 [2021-11-12 23:28:07,409 INFO L226 Difference]: Without dead ends: 704 [2021-11-12 23:28:07,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:28:07,410 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 115 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1589.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1750.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:07,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 0 Invalid, 322 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [15 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 1750.47ms Time] [2021-11-12 23:28:07,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-12 23:28:07,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 322. [2021-11-12 23:28:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.3769470404984423) internal successors, (1084), 321 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1084 transitions. [2021-11-12 23:28:07,428 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1084 transitions. Word has length 24 [2021-11-12 23:28:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:07,428 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1084 transitions. [2021-11-12 23:28:07,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1084 transitions. [2021-11-12 23:28:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:07,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:07,430 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:07,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (119)] Ended with exit code 0 [2021-11-12 23:28:07,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:07,644 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:07,645 INFO L85 PathProgramCache]: Analyzing trace with hash 19671295, now seen corresponding path program 53 times [2021-11-12 23:28:07,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:07,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488545341] [2021-11-12 23:28:07,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:28:07,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:07,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:07,646 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:07,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2021-11-12 23:28:07,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:28:07,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:07,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:07,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:08,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:09,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:09,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488545341] [2021-11-12 23:28:09,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488545341] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:28:09,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:28:09,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:28:09,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160971804] [2021-11-12 23:28:09,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:09,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:28:09,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:28:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:09,133 INFO L87 Difference]: Start difference. First operand 322 states and 1084 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:11,235 INFO L93 Difference]: Finished difference Result 644 states and 1931 transitions. [2021-11-12 23:28:11,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:28:11,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:11,237 INFO L225 Difference]: With dead ends: 644 [2021-11-12 23:28:11,237 INFO L226 Difference]: Without dead ends: 644 [2021-11-12 23:28:11,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:28:11,238 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1445.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1600.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:11,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 326 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [7 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 1600.48ms Time] [2021-11-12 23:28:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-11-12 23:28:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 326. [2021-11-12 23:28:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.403076923076923) internal successors, (1106), 325 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1106 transitions. [2021-11-12 23:28:11,246 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1106 transitions. Word has length 24 [2021-11-12 23:28:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:11,246 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1106 transitions. [2021-11-12 23:28:11,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1106 transitions. [2021-11-12 23:28:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:11,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:11,247 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:11,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:11,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:11,448 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash 874977949, now seen corresponding path program 54 times [2021-11-12 23:28:11,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:11,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057934655] [2021-11-12 23:28:11,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:28:11,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:11,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:11,449 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:11,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2021-11-12 23:28:11,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:28:11,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:11,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:11,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:12,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:13,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:13,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057934655] [2021-11-12 23:28:13,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057934655] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:28:13,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:28:13,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:28:13,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395252205] [2021-11-12 23:28:13,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:13,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:28:13,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:13,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:28:13,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:13,323 INFO L87 Difference]: Start difference. First operand 326 states and 1106 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:15,355 INFO L93 Difference]: Finished difference Result 614 states and 1865 transitions. [2021-11-12 23:28:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:28:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:15,357 INFO L225 Difference]: With dead ends: 614 [2021-11-12 23:28:15,357 INFO L226 Difference]: Without dead ends: 614 [2021-11-12 23:28:15,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:28:15,357 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1338.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1479.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:15,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 291 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [8 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 1479.03ms Time] [2021-11-12 23:28:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-12 23:28:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 322. [2021-11-12 23:28:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.3769470404984423) internal successors, (1084), 321 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1084 transitions. [2021-11-12 23:28:15,365 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1084 transitions. Word has length 24 [2021-11-12 23:28:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:15,365 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1084 transitions. [2021-11-12 23:28:15,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1084 transitions. [2021-11-12 23:28:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:15,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:15,366 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:15,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:15,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:15,567 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash -569869220, now seen corresponding path program 53 times [2021-11-12 23:28:15,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:15,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388544719] [2021-11-12 23:28:15,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:28:15,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:15,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:15,568 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:15,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2021-11-12 23:28:15,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:28:15,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:15,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:28:15,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:16,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:16,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:16,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388544719] [2021-11-12 23:28:16,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388544719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:16,864 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:16,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:28:16,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858558414] [2021-11-12 23:28:16,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:16,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:28:16,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:16,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:28:16,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:16,865 INFO L87 Difference]: Start difference. First operand 322 states and 1084 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:18,056 INFO L93 Difference]: Finished difference Result 522 states and 1666 transitions. [2021-11-12 23:28:18,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:28:18,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:18,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:18,058 INFO L225 Difference]: With dead ends: 522 [2021-11-12 23:28:18,058 INFO L226 Difference]: Without dead ends: 522 [2021-11-12 23:28:18,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:28:18,058 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 977.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1120.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:18,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 373 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [10 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 1120.98ms Time] [2021-11-12 23:28:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-12 23:28:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 326. [2021-11-12 23:28:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.403076923076923) internal successors, (1106), 325 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1106 transitions. [2021-11-12 23:28:18,066 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1106 transitions. Word has length 24 [2021-11-12 23:28:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:18,067 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1106 transitions. [2021-11-12 23:28:18,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1106 transitions. [2021-11-12 23:28:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:18,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:18,068 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:18,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:18,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:18,271 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:18,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1487819410, now seen corresponding path program 54 times [2021-11-12 23:28:18,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:18,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883243825] [2021-11-12 23:28:18,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:28:18,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:18,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:18,273 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:18,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2021-11-12 23:28:18,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:28:18,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:28:18,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:18,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:19,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:19,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883243825] [2021-11-12 23:28:19,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883243825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:19,499 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:19,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:28:19,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150390753] [2021-11-12 23:28:19,499 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:19,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:28:19,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:19,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:28:19,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:19,500 INFO L87 Difference]: Start difference. First operand 326 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:20,330 INFO L93 Difference]: Finished difference Result 522 states and 1666 transitions. [2021-11-12 23:28:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:28:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:20,332 INFO L225 Difference]: With dead ends: 522 [2021-11-12 23:28:20,332 INFO L226 Difference]: Without dead ends: 522 [2021-11-12 23:28:20,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:28:20,332 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 673.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 769.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:20,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 248 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [15 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 769.42ms Time] [2021-11-12 23:28:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-12 23:28:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 320. [2021-11-12 23:28:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.3573667711598745) internal successors, (1071), 319 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1071 transitions. [2021-11-12 23:28:20,339 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1071 transitions. Word has length 24 [2021-11-12 23:28:20,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:20,339 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1071 transitions. [2021-11-12 23:28:20,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1071 transitions. [2021-11-12 23:28:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:20,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:20,340 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:20,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:20,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:20,541 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:20,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:20,541 INFO L85 PathProgramCache]: Analyzing trace with hash -828964040, now seen corresponding path program 55 times [2021-11-12 23:28:20,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:20,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007326653] [2021-11-12 23:28:20,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:28:20,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:20,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:20,542 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:20,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2021-11-12 23:28:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:20,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:28:20,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:20,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:21,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:21,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007326653] [2021-11-12 23:28:21,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007326653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:21,413 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:21,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:28:21,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304235183] [2021-11-12 23:28:21,414 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:21,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:28:21,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:21,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:28:21,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:21,414 INFO L87 Difference]: Start difference. First operand 320 states and 1071 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:22,385 INFO L93 Difference]: Finished difference Result 446 states and 1423 transitions. [2021-11-12 23:28:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:28:22,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:22,386 INFO L225 Difference]: With dead ends: 446 [2021-11-12 23:28:22,387 INFO L226 Difference]: Without dead ends: 446 [2021-11-12 23:28:22,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:28:22,387 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 711.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 810.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:22,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 339 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [9 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 810.38ms Time] [2021-11-12 23:28:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-12 23:28:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 322. [2021-11-12 23:28:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.370716510903427) internal successors, (1082), 321 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:22,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1082 transitions. [2021-11-12 23:28:22,396 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1082 transitions. Word has length 24 [2021-11-12 23:28:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:22,397 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1082 transitions. [2021-11-12 23:28:22,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:22,397 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1082 transitions. [2021-11-12 23:28:22,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:22,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:22,398 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:22,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (124)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:22,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:22,612 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash 270379100, now seen corresponding path program 56 times [2021-11-12 23:28:22,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:22,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289134826] [2021-11-12 23:28:22,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:28:22,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:22,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:22,614 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:22,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2021-11-12 23:28:22,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:28:22,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:22,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:28:22,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:23,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:23,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:23,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289134826] [2021-11-12 23:28:23,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289134826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:23,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:23,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:28:23,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062895542] [2021-11-12 23:28:23,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:23,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:28:23,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:23,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:28:23,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:28:23,462 INFO L87 Difference]: Start difference. First operand 322 states and 1082 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:24,477 INFO L93 Difference]: Finished difference Result 440 states and 1423 transitions. [2021-11-12 23:28:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:28:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:24,479 INFO L225 Difference]: With dead ends: 440 [2021-11-12 23:28:24,479 INFO L226 Difference]: Without dead ends: 440 [2021-11-12 23:28:24,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:28:24,480 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 766.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 875.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:24,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 332 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [9 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 875.60ms Time] [2021-11-12 23:28:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-12 23:28:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 322. [2021-11-12 23:28:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.370716510903427) internal successors, (1082), 321 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1082 transitions. [2021-11-12 23:28:24,487 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1082 transitions. Word has length 24 [2021-11-12 23:28:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:24,487 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1082 transitions. [2021-11-12 23:28:24,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1082 transitions. [2021-11-12 23:28:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:24,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:24,488 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:24,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (125)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:24,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:24,689 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2030855409, now seen corresponding path program 55 times [2021-11-12 23:28:24,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:24,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485043847] [2021-11-12 23:28:24,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:28:24,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:24,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:24,691 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:24,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2021-11-12 23:28:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:24,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:25,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:25,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:25,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485043847] [2021-11-12 23:28:25,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485043847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:25,758 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:25,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:28:25,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552411144] [2021-11-12 23:28:25,758 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:25,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:28:25,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:28:25,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:25,759 INFO L87 Difference]: Start difference. First operand 322 states and 1082 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:27,393 INFO L93 Difference]: Finished difference Result 480 states and 1547 transitions. [2021-11-12 23:28:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:28:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:27,395 INFO L225 Difference]: With dead ends: 480 [2021-11-12 23:28:27,395 INFO L226 Difference]: Without dead ends: 476 [2021-11-12 23:28:27,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:28:27,395 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 888.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1004.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:27,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 448 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [15 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1004.99ms Time] [2021-11-12 23:28:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-12 23:28:27,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 330. [2021-11-12 23:28:27,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.3677811550151975) internal successors, (1108), 329 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1108 transitions. [2021-11-12 23:28:27,401 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1108 transitions. Word has length 24 [2021-11-12 23:28:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:27,401 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 1108 transitions. [2021-11-12 23:28:27,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1108 transitions. [2021-11-12 23:28:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:27,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:27,402 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:27,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (126)] Ended with exit code 0 [2021-11-12 23:28:27,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:27,603 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:27,603 INFO L85 PathProgramCache]: Analyzing trace with hash 917472391, now seen corresponding path program 56 times [2021-11-12 23:28:27,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:27,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548187698] [2021-11-12 23:28:27,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:28:27,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:27,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:27,609 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:27,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2021-11-12 23:28:27,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:28:27,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:27,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:27,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:28,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:28,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:28,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548187698] [2021-11-12 23:28:28,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548187698] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:28:28,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:28:28,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:28:28,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037979730] [2021-11-12 23:28:28,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:28,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:28:28,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:28:28,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:28,757 INFO L87 Difference]: Start difference. First operand 330 states and 1108 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:30,402 INFO L93 Difference]: Finished difference Result 512 states and 1617 transitions. [2021-11-12 23:28:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:28:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:30,404 INFO L225 Difference]: With dead ends: 512 [2021-11-12 23:28:30,404 INFO L226 Difference]: Without dead ends: 512 [2021-11-12 23:28:30,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:28:30,405 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1003.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1128.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:30,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 297 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 1128.22ms Time] [2021-11-12 23:28:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-12 23:28:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 326. [2021-11-12 23:28:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.3661538461538463) internal successors, (1094), 325 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1094 transitions. [2021-11-12 23:28:30,411 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1094 transitions. Word has length 24 [2021-11-12 23:28:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:30,412 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1094 transitions. [2021-11-12 23:28:30,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1094 transitions. [2021-11-12 23:28:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:30,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:30,413 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:30,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:30,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:30,626 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:30,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:30,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1478959953, now seen corresponding path program 57 times [2021-11-12 23:28:30,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:30,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859167177] [2021-11-12 23:28:30,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:28:30,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:30,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:30,628 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:30,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2021-11-12 23:28:30,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:28:30,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:30,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:31,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:31,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:31,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859167177] [2021-11-12 23:28:31,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859167177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:31,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1646525444] [2021-11-12 23:28:31,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:28:31,598 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:31,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:31,609 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:31,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2021-11-12 23:28:32,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:28:32,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:32,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:32,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:32,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:32,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1646525444] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:32,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309562117] [2021-11-12 23:28:32,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:28:32,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:28:32,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:28:32,811 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:28:32,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-11-12 23:28:32,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:28:32,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:32,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:28:32,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:33,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:33,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309562117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:33,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:28:33,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-12 23:28:33,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749358802] [2021-11-12 23:28:33,878 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:28:33,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:28:33,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:33,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:28:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:28:33,879 INFO L87 Difference]: Start difference. First operand 326 states and 1094 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:36,399 INFO L93 Difference]: Finished difference Result 536 states and 1675 transitions. [2021-11-12 23:28:36,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:28:36,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:36,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:36,401 INFO L225 Difference]: With dead ends: 536 [2021-11-12 23:28:36,401 INFO L226 Difference]: Without dead ends: 536 [2021-11-12 23:28:36,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:28:36,402 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1685.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.33ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1913.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:36,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 898 Unknown, 0 Unchecked, 3.33ms Time], IncrementalHoareTripleChecker [14 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 1913.74ms Time] [2021-11-12 23:28:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-12 23:28:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 324. [2021-11-12 23:28:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.371517027863777) internal successors, (1089), 323 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1089 transitions. [2021-11-12 23:28:36,409 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1089 transitions. Word has length 24 [2021-11-12 23:28:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:36,409 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1089 transitions. [2021-11-12 23:28:36,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1089 transitions. [2021-11-12 23:28:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:36,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:36,410 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:36,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:36,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (129)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:36,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:37,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:37,011 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:37,011 INFO L85 PathProgramCache]: Analyzing trace with hash 245916533, now seen corresponding path program 58 times [2021-11-12 23:28:37,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:37,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475676157] [2021-11-12 23:28:37,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:28:37,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:37,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:37,013 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:37,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2021-11-12 23:28:37,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:28:37,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:37,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:37,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:37,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:38,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:38,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475676157] [2021-11-12 23:28:38,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475676157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:38,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [568201884] [2021-11-12 23:28:38,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:28:38,425 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:38,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:38,425 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:38,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (132)] Waiting until timeout for monitored process [2021-11-12 23:28:38,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:28:38,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:38,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:38,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:39,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:39,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [568201884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:39,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068922219] [2021-11-12 23:28:39,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:28:39,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:28:39,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:28:39,479 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:28:39,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-11-12 23:28:39,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:28:39,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:39,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:39,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:39,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:40,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068922219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:40,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:28:40,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-12 23:28:40,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999743556] [2021-11-12 23:28:40,290 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:28:40,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:28:40,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:28:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:40,291 INFO L87 Difference]: Start difference. First operand 324 states and 1089 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:41,719 INFO L93 Difference]: Finished difference Result 560 states and 1725 transitions. [2021-11-12 23:28:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:28:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:41,721 INFO L225 Difference]: With dead ends: 560 [2021-11-12 23:28:41,721 INFO L226 Difference]: Without dead ends: 560 [2021-11-12 23:28:41,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:28:41,721 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1119.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1264.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:41,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 452 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [9 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 1264.16ms Time] [2021-11-12 23:28:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-12 23:28:41,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 324. [2021-11-12 23:28:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.362229102167183) internal successors, (1086), 323 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1086 transitions. [2021-11-12 23:28:41,728 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1086 transitions. Word has length 24 [2021-11-12 23:28:41,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:41,729 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1086 transitions. [2021-11-12 23:28:41,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:41,729 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1086 transitions. [2021-11-12 23:28:41,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:41,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:41,729 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:41,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (131)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:41,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (132)] Ended with exit code 0 [2021-11-12 23:28:42,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:42,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:28:42,330 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:42,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:42,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1101223187, now seen corresponding path program 59 times [2021-11-12 23:28:42,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:42,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239419360] [2021-11-12 23:28:42,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:28:42,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:42,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:42,332 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:42,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2021-11-12 23:28:42,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:28:42,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:42,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:43,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:43,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:43,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239419360] [2021-11-12 23:28:43,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239419360] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:43,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [982543574] [2021-11-12 23:28:43,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:28:43,824 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:43,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:43,825 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:43,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (135)] Waiting until timeout for monitored process [2021-11-12 23:28:44,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:28:44,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:44,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:44,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:44,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:44,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [982543574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:44,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65316249] [2021-11-12 23:28:44,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:28:44,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:28:44,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:28:44,972 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:28:44,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-11-12 23:28:45,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:28:45,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:45,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:45,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:45,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:45,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65316249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:45,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:28:45,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-12 23:28:45,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703322129] [2021-11-12 23:28:45,934 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:28:45,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:28:45,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:45,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:28:45,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:45,934 INFO L87 Difference]: Start difference. First operand 324 states and 1086 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:47,514 INFO L93 Difference]: Finished difference Result 558 states and 1719 transitions. [2021-11-12 23:28:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:28:47,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:47,517 INFO L225 Difference]: With dead ends: 558 [2021-11-12 23:28:47,517 INFO L226 Difference]: Without dead ends: 558 [2021-11-12 23:28:47,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:28:47,517 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1223.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.97ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1383.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:47,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 477 Unknown, 0 Unchecked, 1.97ms Time], IncrementalHoareTripleChecker [7 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 1383.10ms Time] [2021-11-12 23:28:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-12 23:28:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 320. [2021-11-12 23:28:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.335423197492163) internal successors, (1064), 319 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1064 transitions. [2021-11-12 23:28:47,531 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1064 transitions. Word has length 24 [2021-11-12 23:28:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:47,531 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1064 transitions. [2021-11-12 23:28:47,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1064 transitions. [2021-11-12 23:28:47,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:47,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:47,532 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:47,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (134)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:47,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:47,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (135)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:48,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:48,133 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:48,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:48,134 INFO L85 PathProgramCache]: Analyzing trace with hash 400890951, now seen corresponding path program 60 times [2021-11-12 23:28:48,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:48,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887186607] [2021-11-12 23:28:48,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:28:48,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:48,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:48,135 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:48,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2021-11-12 23:28:48,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:28:48,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:48,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:28:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:48,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:49,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:49,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887186607] [2021-11-12 23:28:49,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887186607] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:28:49,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:28:49,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:28:49,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273917755] [2021-11-12 23:28:49,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:49,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:28:49,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:49,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:28:49,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:28:49,366 INFO L87 Difference]: Start difference. First operand 320 states and 1064 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:51,156 INFO L93 Difference]: Finished difference Result 534 states and 1640 transitions. [2021-11-12 23:28:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:28:51,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:51,157 INFO L225 Difference]: With dead ends: 534 [2021-11-12 23:28:51,158 INFO L226 Difference]: Without dead ends: 534 [2021-11-12 23:28:51,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:28:51,158 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1327.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1456.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:51,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 301 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [3 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 1456.44ms Time] [2021-11-12 23:28:51,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-12 23:28:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 312. [2021-11-12 23:28:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.347266881028939) internal successors, (1041), 311 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 1041 transitions. [2021-11-12 23:28:51,166 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 1041 transitions. Word has length 24 [2021-11-12 23:28:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:51,167 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 1041 transitions. [2021-11-12 23:28:51,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 1041 transitions. [2021-11-12 23:28:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:51,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:51,168 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:51,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (137)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:51,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:51,381 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:51,382 INFO L85 PathProgramCache]: Analyzing trace with hash -849970248, now seen corresponding path program 57 times [2021-11-12 23:28:51,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:51,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173136582] [2021-11-12 23:28:51,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:28:51,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:51,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:51,383 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:51,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2021-11-12 23:28:51,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:28:51,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:51,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:28:51,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:52,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:52,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:52,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173136582] [2021-11-12 23:28:52,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173136582] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:52,845 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:52,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:28:52,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194703946] [2021-11-12 23:28:52,845 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:52,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:28:52,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:52,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:28:52,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:52,846 INFO L87 Difference]: Start difference. First operand 312 states and 1041 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:53,843 INFO L93 Difference]: Finished difference Result 496 states and 1582 transitions. [2021-11-12 23:28:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:28:53,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:53,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:53,845 INFO L225 Difference]: With dead ends: 496 [2021-11-12 23:28:53,845 INFO L226 Difference]: Without dead ends: 496 [2021-11-12 23:28:53,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:28:53,846 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 815.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 929.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:53,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 341 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [8 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 929.26ms Time] [2021-11-12 23:28:53,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-12 23:28:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 314. [2021-11-12 23:28:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3482428115015974) internal successors, (1048), 313 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1048 transitions. [2021-11-12 23:28:53,852 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1048 transitions. Word has length 24 [2021-11-12 23:28:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:53,852 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1048 transitions. [2021-11-12 23:28:53,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1048 transitions. [2021-11-12 23:28:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:53,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:53,853 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:53,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (138)] Ended with exit code 0 [2021-11-12 23:28:54,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:54,053 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:54,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1767920438, now seen corresponding path program 58 times [2021-11-12 23:28:54,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:54,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126545793] [2021-11-12 23:28:54,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:28:54,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:54,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:54,055 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:54,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2021-11-12 23:28:54,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:28:54,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:54,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:28:54,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:54,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:55,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:55,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126545793] [2021-11-12 23:28:55,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126545793] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:55,073 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:55,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:28:55,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158606716] [2021-11-12 23:28:55,073 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:55,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:28:55,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:28:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:55,074 INFO L87 Difference]: Start difference. First operand 314 states and 1048 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:56,070 INFO L93 Difference]: Finished difference Result 474 states and 1536 transitions. [2021-11-12 23:28:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:28:56,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:56,072 INFO L225 Difference]: With dead ends: 474 [2021-11-12 23:28:56,072 INFO L226 Difference]: Without dead ends: 474 [2021-11-12 23:28:56,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:28:56,072 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 818.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 933.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:56,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 316 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [9 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 933.73ms Time] [2021-11-12 23:28:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-12 23:28:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 300. [2021-11-12 23:28:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.331103678929766) internal successors, (996), 299 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 996 transitions. [2021-11-12 23:28:56,079 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 996 transitions. Word has length 24 [2021-11-12 23:28:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:56,079 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 996 transitions. [2021-11-12 23:28:56,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 996 transitions. [2021-11-12 23:28:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:56,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:56,080 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:56,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (139)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:56,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:56,280 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:56,281 INFO L85 PathProgramCache]: Analyzing trace with hash -823712488, now seen corresponding path program 59 times [2021-11-12 23:28:56,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:56,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696895298] [2021-11-12 23:28:56,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:28:56,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:56,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:56,283 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:56,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2021-11-12 23:28:56,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:28:56,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:56,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:28:56,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:56,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:57,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:57,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696895298] [2021-11-12 23:28:57,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696895298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:57,140 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:57,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:28:57,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932588476] [2021-11-12 23:28:57,140 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:57,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:28:57,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:57,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:28:57,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:28:57,141 INFO L87 Difference]: Start difference. First operand 300 states and 996 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:57,894 INFO L93 Difference]: Finished difference Result 462 states and 1478 transitions. [2021-11-12 23:28:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:28:57,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:28:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:57,895 INFO L225 Difference]: With dead ends: 462 [2021-11-12 23:28:57,895 INFO L226 Difference]: Without dead ends: 462 [2021-11-12 23:28:57,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:28:57,896 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 596.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 684.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:57,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 280 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [8 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 684.86ms Time] [2021-11-12 23:28:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-12 23:28:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 292. [2021-11-12 23:28:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.3058419243986252) internal successors, (962), 291 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 962 transitions. [2021-11-12 23:28:57,902 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 962 transitions. Word has length 24 [2021-11-12 23:28:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:57,902 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 962 transitions. [2021-11-12 23:28:57,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:28:57,902 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 962 transitions. [2021-11-12 23:28:57,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:28:57,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:57,903 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:57,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (140)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:58,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:58,107 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:28:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash 852899000, now seen corresponding path program 60 times [2021-11-12 23:28:58,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:58,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809788835] [2021-11-12 23:28:58,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:28:58,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:58,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:58,110 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:58,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2021-11-12 23:28:58,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:28:58,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:28:58,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:28:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:58,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:28:59,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:59,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809788835] [2021-11-12 23:28:59,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809788835] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:59,196 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:59,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:28:59,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592943104] [2021-11-12 23:28:59,196 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:59,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:28:59,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:59,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:28:59,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:28:59,198 INFO L87 Difference]: Start difference. First operand 292 states and 962 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:00,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:00,262 INFO L93 Difference]: Finished difference Result 520 states and 1563 transitions. [2021-11-12 23:29:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:00,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:00,264 INFO L225 Difference]: With dead ends: 520 [2021-11-12 23:29:00,264 INFO L226 Difference]: Without dead ends: 506 [2021-11-12 23:29:00,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:29:00,265 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 801.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.49ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 911.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:00,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 346 Unknown, 0 Unchecked, 1.49ms Time], IncrementalHoareTripleChecker [3 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 911.15ms Time] [2021-11-12 23:29:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-12 23:29:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 300. [2021-11-12 23:29:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.317725752508361) internal successors, (992), 299 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 992 transitions. [2021-11-12 23:29:00,274 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 992 transitions. Word has length 24 [2021-11-12 23:29:00,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:00,274 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 992 transitions. [2021-11-12 23:29:00,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 992 transitions. [2021-11-12 23:29:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:00,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:00,275 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:00,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (141)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:00,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:00,479 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:00,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:00,479 INFO L85 PathProgramCache]: Analyzing trace with hash -251695692, now seen corresponding path program 61 times [2021-11-12 23:29:00,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:00,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158506708] [2021-11-12 23:29:00,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:29:00,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:00,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:00,482 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:00,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2021-11-12 23:29:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:00,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:00,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:01,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:01,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:01,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158506708] [2021-11-12 23:29:01,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158506708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:01,682 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:01,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:01,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928535893] [2021-11-12 23:29:01,683 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:01,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:01,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:01,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:01,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:01,684 INFO L87 Difference]: Start difference. First operand 300 states and 992 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:02,891 INFO L93 Difference]: Finished difference Result 532 states and 1585 transitions. [2021-11-12 23:29:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:02,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:02,893 INFO L225 Difference]: With dead ends: 532 [2021-11-12 23:29:02,893 INFO L226 Difference]: Without dead ends: 526 [2021-11-12 23:29:02,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:29:02,894 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 892.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1012.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:02,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 377 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [3 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 1012.47ms Time] [2021-11-12 23:29:02,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-12 23:29:02,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 310. [2021-11-12 23:29:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.29126213592233) internal successors, (1017), 309 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1017 transitions. [2021-11-12 23:29:02,900 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1017 transitions. Word has length 24 [2021-11-12 23:29:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:02,900 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1017 transitions. [2021-11-12 23:29:02,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1017 transitions. [2021-11-12 23:29:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:02,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:02,901 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:02,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (142)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:03,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:03,102 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:03,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:03,102 INFO L85 PathProgramCache]: Analyzing trace with hash -823150498, now seen corresponding path program 62 times [2021-11-12 23:29:03,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:03,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042368472] [2021-11-12 23:29:03,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:29:03,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:03,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:03,103 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:03,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2021-11-12 23:29:03,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:29:03,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:03,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:03,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:03,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:04,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:04,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042368472] [2021-11-12 23:29:04,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042368472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:04,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:04,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:04,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367949441] [2021-11-12 23:29:04,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:04,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:04,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:04,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:04,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:04,279 INFO L87 Difference]: Start difference. First operand 310 states and 1017 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:05,436 INFO L93 Difference]: Finished difference Result 512 states and 1556 transitions. [2021-11-12 23:29:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:05,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:05,438 INFO L225 Difference]: With dead ends: 512 [2021-11-12 23:29:05,438 INFO L226 Difference]: Without dead ends: 512 [2021-11-12 23:29:05,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:29:05,438 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 859.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 980.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:05,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 372 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [4 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 980.25ms Time] [2021-11-12 23:29:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-12 23:29:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 296. [2021-11-12 23:29:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.3322033898305086) internal successors, (983), 295 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 983 transitions. [2021-11-12 23:29:05,445 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 983 transitions. Word has length 24 [2021-11-12 23:29:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:05,445 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 983 transitions. [2021-11-12 23:29:05,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:05,446 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 983 transitions. [2021-11-12 23:29:05,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:05,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:05,446 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:05,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (143)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:05,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:05,647 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:05,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:05,647 INFO L85 PathProgramCache]: Analyzing trace with hash -828937910, now seen corresponding path program 63 times [2021-11-12 23:29:05,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:05,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670693524] [2021-11-12 23:29:05,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:29:05,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:05,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:05,648 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:05,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2021-11-12 23:29:05,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:29:05,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:05,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:05,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:06,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:06,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:06,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670693524] [2021-11-12 23:29:06,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670693524] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:06,734 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:06,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:29:06,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291156165] [2021-11-12 23:29:06,734 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:06,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:29:06,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:06,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:29:06,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:29:06,735 INFO L87 Difference]: Start difference. First operand 296 states and 983 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:07,611 INFO L93 Difference]: Finished difference Result 480 states and 1475 transitions. [2021-11-12 23:29:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:07,612 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:07,613 INFO L225 Difference]: With dead ends: 480 [2021-11-12 23:29:07,613 INFO L226 Difference]: Without dead ends: 466 [2021-11-12 23:29:07,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:29:07,614 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 645.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.19ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 731.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:07,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 317 Unknown, 0 Unchecked, 1.19ms Time], IncrementalHoareTripleChecker [5 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 731.39ms Time] [2021-11-12 23:29:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-12 23:29:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 302. [2021-11-12 23:29:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.3156146179401995) internal successors, (998), 301 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 998 transitions. [2021-11-12 23:29:07,624 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 998 transitions. Word has length 24 [2021-11-12 23:29:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:07,625 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 998 transitions. [2021-11-12 23:29:07,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 998 transitions. [2021-11-12 23:29:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:07,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:07,625 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:07,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (144)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:07,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:07,826 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:07,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:07,827 INFO L85 PathProgramCache]: Analyzing trace with hash -325217420, now seen corresponding path program 64 times [2021-11-12 23:29:07,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:07,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435859455] [2021-11-12 23:29:07,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:29:07,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:07,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:07,828 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:07,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2021-11-12 23:29:07,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:29:07,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:07,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:07,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:08,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:08,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:08,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435859455] [2021-11-12 23:29:08,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435859455] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:08,943 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:08,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:08,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015196168] [2021-11-12 23:29:08,943 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:08,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:08,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:08,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:08,943 INFO L87 Difference]: Start difference. First operand 302 states and 998 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:10,085 INFO L93 Difference]: Finished difference Result 502 states and 1530 transitions. [2021-11-12 23:29:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:10,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:10,087 INFO L225 Difference]: With dead ends: 502 [2021-11-12 23:29:10,087 INFO L226 Difference]: Without dead ends: 496 [2021-11-12 23:29:10,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:29:10,087 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 820.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 930.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:10,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 303 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [9 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 930.07ms Time] [2021-11-12 23:29:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-12 23:29:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 316. [2021-11-12 23:29:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.311111111111111) internal successors, (1043), 315 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1043 transitions. [2021-11-12 23:29:10,094 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1043 transitions. Word has length 24 [2021-11-12 23:29:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:10,094 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 1043 transitions. [2021-11-12 23:29:10,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1043 transitions. [2021-11-12 23:29:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:10,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:10,095 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:10,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (145)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:10,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:10,295 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:10,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:10,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2026165847, now seen corresponding path program 61 times [2021-11-12 23:29:10,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:10,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393238358] [2021-11-12 23:29:10,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:29:10,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:10,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:10,297 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:10,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2021-11-12 23:29:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:10,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:29:10,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:10,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:11,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:11,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393238358] [2021-11-12 23:29:11,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393238358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:11,440 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:11,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:11,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839583696] [2021-11-12 23:29:11,440 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:11,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:11,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:11,441 INFO L87 Difference]: Start difference. First operand 316 states and 1043 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:13,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:13,206 INFO L93 Difference]: Finished difference Result 508 states and 1624 transitions. [2021-11-12 23:29:13,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:29:13,207 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:13,208 INFO L225 Difference]: With dead ends: 508 [2021-11-12 23:29:13,208 INFO L226 Difference]: Without dead ends: 490 [2021-11-12 23:29:13,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:29:13,208 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 180 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 964.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.98ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1104.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:13,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 0 Invalid, 438 Unknown, 0 Unchecked, 1.98ms Time], IncrementalHoareTripleChecker [15 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1104.63ms Time] [2021-11-12 23:29:13,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-12 23:29:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 338. [2021-11-12 23:29:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.311572700296736) internal successors, (1116), 337 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1116 transitions. [2021-11-12 23:29:13,214 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1116 transitions. Word has length 24 [2021-11-12 23:29:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:13,215 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1116 transitions. [2021-11-12 23:29:13,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1116 transitions. [2021-11-12 23:29:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:13,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:13,215 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:13,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (146)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:13,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:13,416 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:13,416 INFO L85 PathProgramCache]: Analyzing trace with hash -687226323, now seen corresponding path program 62 times [2021-11-12 23:29:13,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:13,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279026370] [2021-11-12 23:29:13,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:29:13,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:13,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:13,417 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:13,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2021-11-12 23:29:13,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:29:13,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:13,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:29:13,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:13,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:14,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:14,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279026370] [2021-11-12 23:29:14,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279026370] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:29:14,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:29:14,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:29:14,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482246424] [2021-11-12 23:29:14,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:14,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:29:14,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:29:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:14,470 INFO L87 Difference]: Start difference. First operand 338 states and 1116 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:15,497 INFO L93 Difference]: Finished difference Result 426 states and 1409 transitions. [2021-11-12 23:29:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:15,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:15,498 INFO L225 Difference]: With dead ends: 426 [2021-11-12 23:29:15,499 INFO L226 Difference]: Without dead ends: 426 [2021-11-12 23:29:15,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:29:15,499 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 665.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.05ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 753.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:15,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 206 Unknown, 0 Unchecked, 1.05ms Time], IncrementalHoareTripleChecker [9 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 753.34ms Time] [2021-11-12 23:29:15,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-12 23:29:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 338. [2021-11-12 23:29:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.311572700296736) internal successors, (1116), 337 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:15,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1116 transitions. [2021-11-12 23:29:15,505 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1116 transitions. Word has length 24 [2021-11-12 23:29:15,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:15,506 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1116 transitions. [2021-11-12 23:29:15,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:15,506 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1116 transitions. [2021-11-12 23:29:15,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:15,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:15,507 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:15,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (147)] Ended with exit code 0 [2021-11-12 23:29:15,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:15,721 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:15,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1814622416, now seen corresponding path program 65 times [2021-11-12 23:29:15,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:15,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921511203] [2021-11-12 23:29:15,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:29:15,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:15,723 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:15,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2021-11-12 23:29:15,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:29:15,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:15,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:15,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:16,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:16,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:16,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921511203] [2021-11-12 23:29:16,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921511203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:16,928 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:16,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:16,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247031029] [2021-11-12 23:29:16,928 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:16,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:16,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:16,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:16,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:16,929 INFO L87 Difference]: Start difference. First operand 338 states and 1116 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:18,128 INFO L93 Difference]: Finished difference Result 468 states and 1500 transitions. [2021-11-12 23:29:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:18,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:18,130 INFO L225 Difference]: With dead ends: 468 [2021-11-12 23:29:18,130 INFO L226 Difference]: Without dead ends: 468 [2021-11-12 23:29:18,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:29:18,130 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 895.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.46ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1012.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:18,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 362 Unknown, 0 Unchecked, 1.46ms Time], IncrementalHoareTripleChecker [5 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 1012.63ms Time] [2021-11-12 23:29:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-12 23:29:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 324. [2021-11-12 23:29:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.328173374613003) internal successors, (1075), 323 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1075 transitions. [2021-11-12 23:29:18,136 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1075 transitions. Word has length 24 [2021-11-12 23:29:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:18,136 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1075 transitions. [2021-11-12 23:29:18,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1075 transitions. [2021-11-12 23:29:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:18,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:18,137 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:18,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (148)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:18,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:18,338 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1544791255, now seen corresponding path program 63 times [2021-11-12 23:29:18,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:18,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652075030] [2021-11-12 23:29:18,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:29:18,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:18,339 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:18,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2021-11-12 23:29:18,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:29:18,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:18,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:29:18,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:18,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:19,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:19,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652075030] [2021-11-12 23:29:19,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652075030] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:29:19,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:29:19,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:29:19,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982021799] [2021-11-12 23:29:19,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:19,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:29:19,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:29:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:29:19,128 INFO L87 Difference]: Start difference. First operand 324 states and 1075 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:20,035 INFO L93 Difference]: Finished difference Result 438 states and 1440 transitions. [2021-11-12 23:29:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:20,037 INFO L225 Difference]: With dead ends: 438 [2021-11-12 23:29:20,037 INFO L226 Difference]: Without dead ends: 438 [2021-11-12 23:29:20,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:29:20,037 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 641.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 728.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:20,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 259 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [5 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 728.39ms Time] [2021-11-12 23:29:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-12 23:29:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 318. [2021-11-12 23:29:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.3438485804416405) internal successors, (1060), 317 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 1060 transitions. [2021-11-12 23:29:20,042 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 1060 transitions. Word has length 24 [2021-11-12 23:29:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:20,043 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 1060 transitions. [2021-11-12 23:29:20,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 1060 transitions. [2021-11-12 23:29:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:20,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:20,043 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:20,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (149)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:20,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:20,244 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:20,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1816229686, now seen corresponding path program 66 times [2021-11-12 23:29:20,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:20,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624279944] [2021-11-12 23:29:20,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:29:20,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:20,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:20,245 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:20,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2021-11-12 23:29:20,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:29:20,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:20,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:20,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:21,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:21,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624279944] [2021-11-12 23:29:21,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624279944] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:21,707 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:21,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:21,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605039384] [2021-11-12 23:29:21,707 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:21,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:21,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:21,708 INFO L87 Difference]: Start difference. First operand 318 states and 1060 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:23,021 INFO L93 Difference]: Finished difference Result 566 states and 1741 transitions. [2021-11-12 23:29:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:23,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:23,023 INFO L225 Difference]: With dead ends: 566 [2021-11-12 23:29:23,023 INFO L226 Difference]: Without dead ends: 560 [2021-11-12 23:29:23,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:29:23,024 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1003.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.60ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1144.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:23,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 310 Unknown, 0 Unchecked, 1.60ms Time], IncrementalHoareTripleChecker [7 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 1144.97ms Time] [2021-11-12 23:29:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-12 23:29:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 332. [2021-11-12 23:29:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.3564954682779455) internal successors, (1111), 331 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1111 transitions. [2021-11-12 23:29:23,033 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1111 transitions. Word has length 24 [2021-11-12 23:29:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:23,033 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1111 transitions. [2021-11-12 23:29:23,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1111 transitions. [2021-11-12 23:29:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:23,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:23,034 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:23,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (150)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:23,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:23,235 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:23,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1907282804, now seen corresponding path program 67 times [2021-11-12 23:29:23,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:23,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454065345] [2021-11-12 23:29:23,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:29:23,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:23,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:23,237 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:23,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2021-11-12 23:29:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:23,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:23,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:23,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:24,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:24,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454065345] [2021-11-12 23:29:24,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454065345] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:24,602 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:24,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:24,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125265207] [2021-11-12 23:29:24,603 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:24,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:24,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:24,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:24,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:24,603 INFO L87 Difference]: Start difference. First operand 332 states and 1111 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:25,781 INFO L93 Difference]: Finished difference Result 570 states and 1761 transitions. [2021-11-12 23:29:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:25,782 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:25,783 INFO L225 Difference]: With dead ends: 570 [2021-11-12 23:29:25,783 INFO L226 Difference]: Without dead ends: 570 [2021-11-12 23:29:25,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:29:25,783 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 916.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1043.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:25,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 361 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [6 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 1043.82ms Time] [2021-11-12 23:29:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-12 23:29:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 330. [2021-11-12 23:29:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.3617021276595747) internal successors, (1106), 329 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1106 transitions. [2021-11-12 23:29:25,790 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1106 transitions. Word has length 24 [2021-11-12 23:29:25,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:25,791 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 1106 transitions. [2021-11-12 23:29:25,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1106 transitions. [2021-11-12 23:29:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:25,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:25,791 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:25,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (151)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:25,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:25,992 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash -207914504, now seen corresponding path program 68 times [2021-11-12 23:29:25,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:25,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119922311] [2021-11-12 23:29:25,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:29:25,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:25,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:25,994 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:25,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2021-11-12 23:29:26,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:29:26,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:26,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:26,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:26,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:27,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:27,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119922311] [2021-11-12 23:29:27,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119922311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:27,328 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:27,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:27,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223179925] [2021-11-12 23:29:27,328 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:27,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:27,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:27,329 INFO L87 Difference]: Start difference. First operand 330 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:28,540 INFO L93 Difference]: Finished difference Result 552 states and 1712 transitions. [2021-11-12 23:29:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:28,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:28,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:28,542 INFO L225 Difference]: With dead ends: 552 [2021-11-12 23:29:28,542 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 23:29:28,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:29:28,543 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 928.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1058.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:28,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 345 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [9 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 1058.95ms Time] [2021-11-12 23:29:28,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 23:29:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 338. [2021-11-12 23:29:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.3827893175074184) internal successors, (1140), 337 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1140 transitions. [2021-11-12 23:29:28,551 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1140 transitions. Word has length 24 [2021-11-12 23:29:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:28,551 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1140 transitions. [2021-11-12 23:29:28,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:28,551 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1140 transitions. [2021-11-12 23:29:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:28,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:28,552 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:28,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (152)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:28,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:28,752 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:28,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2143468763, now seen corresponding path program 64 times [2021-11-12 23:29:28,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:28,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083098379] [2021-11-12 23:29:28,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:29:28,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:28,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:28,754 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:28,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2021-11-12 23:29:28,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:29:28,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:29:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:29,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:30,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:30,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083098379] [2021-11-12 23:29:30,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083098379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:30,203 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:30,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:30,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279042435] [2021-11-12 23:29:30,203 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:30,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:30,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:30,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:30,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:30,204 INFO L87 Difference]: Start difference. First operand 338 states and 1140 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:32,242 INFO L93 Difference]: Finished difference Result 546 states and 1774 transitions. [2021-11-12 23:29:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:29:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:32,244 INFO L225 Difference]: With dead ends: 546 [2021-11-12 23:29:32,244 INFO L226 Difference]: Without dead ends: 536 [2021-11-12 23:29:32,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:29:32,245 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 142 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1127.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1283.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:32,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 0 Invalid, 534 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [16 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1283.92ms Time] [2021-11-12 23:29:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-12 23:29:32,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 346. [2021-11-12 23:29:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.4) internal successors, (1173), 345 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1173 transitions. [2021-11-12 23:29:32,251 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1173 transitions. Word has length 24 [2021-11-12 23:29:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:32,252 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1173 transitions. [2021-11-12 23:29:32,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1173 transitions. [2021-11-12 23:29:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:32,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:32,252 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:32,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (153)] Ended with exit code 0 [2021-11-12 23:29:32,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:32,453 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:32,453 INFO L85 PathProgramCache]: Analyzing trace with hash -569923407, now seen corresponding path program 65 times [2021-11-12 23:29:32,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:32,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632120677] [2021-11-12 23:29:32,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:29:32,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:32,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:32,455 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:32,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (154)] Waiting until timeout for monitored process [2021-11-12 23:29:32,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:29:32,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:32,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:29:32,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:33,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:33,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:33,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632120677] [2021-11-12 23:29:33,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632120677] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:29:33,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:29:33,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:29:33,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7442107] [2021-11-12 23:29:33,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:33,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:29:33,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:29:33,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:33,927 INFO L87 Difference]: Start difference. First operand 346 states and 1173 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:35,595 INFO L93 Difference]: Finished difference Result 604 states and 1857 transitions. [2021-11-12 23:29:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:29:35,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:35,597 INFO L225 Difference]: With dead ends: 604 [2021-11-12 23:29:35,597 INFO L226 Difference]: Without dead ends: 604 [2021-11-12 23:29:35,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:29:35,598 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 959.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.38ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1089.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:35,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 266 Unknown, 0 Unchecked, 1.38ms Time], IncrementalHoareTripleChecker [9 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1089.22ms Time] [2021-11-12 23:29:35,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-12 23:29:35,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 342. [2021-11-12 23:29:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.3841642228739004) internal successors, (1154), 341 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1154 transitions. [2021-11-12 23:29:35,605 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1154 transitions. Word has length 24 [2021-11-12 23:29:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:35,605 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1154 transitions. [2021-11-12 23:29:35,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:35,605 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1154 transitions. [2021-11-12 23:29:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:35,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:35,606 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:35,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (154)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:35,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:35,806 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:35,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1697319500, now seen corresponding path program 69 times [2021-11-12 23:29:35,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:35,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305575852] [2021-11-12 23:29:35,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:29:35,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:35,808 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:35,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2021-11-12 23:29:35,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:29:35,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:36,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:37,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:37,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305575852] [2021-11-12 23:29:37,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305575852] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:37,081 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:37,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:37,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918021940] [2021-11-12 23:29:37,081 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:37,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:37,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:37,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:37,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:37,082 INFO L87 Difference]: Start difference. First operand 342 states and 1154 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:38,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:38,388 INFO L93 Difference]: Finished difference Result 550 states and 1727 transitions. [2021-11-12 23:29:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:38,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:38,389 INFO L225 Difference]: With dead ends: 550 [2021-11-12 23:29:38,390 INFO L226 Difference]: Without dead ends: 550 [2021-11-12 23:29:38,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:29:38,390 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1024.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.60ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1171.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:38,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 340 Unknown, 0 Unchecked, 1.60ms Time], IncrementalHoareTripleChecker [10 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 1171.45ms Time] [2021-11-12 23:29:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-12 23:29:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 338. [2021-11-12 23:29:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.391691394658754) internal successors, (1143), 337 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1143 transitions. [2021-11-12 23:29:38,397 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1143 transitions. Word has length 24 [2021-11-12 23:29:38,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:38,398 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1143 transitions. [2021-11-12 23:29:38,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:38,398 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1143 transitions. [2021-11-12 23:29:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:38,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:38,399 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:38,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (155)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:38,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:38,603 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:38,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:38,603 INFO L85 PathProgramCache]: Analyzing trace with hash -540557575, now seen corresponding path program 66 times [2021-11-12 23:29:38,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:38,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455403351] [2021-11-12 23:29:38,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:29:38,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:38,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:38,604 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:38,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2021-11-12 23:29:38,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:29:38,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:38,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:29:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:39,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:40,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:40,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455403351] [2021-11-12 23:29:40,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455403351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:40,253 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:40,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:40,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589822536] [2021-11-12 23:29:40,253 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:40,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:40,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:40,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:40,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:40,254 INFO L87 Difference]: Start difference. First operand 338 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:42,164 INFO L93 Difference]: Finished difference Result 550 states and 1761 transitions. [2021-11-12 23:29:42,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:29:42,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:42,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:42,166 INFO L225 Difference]: With dead ends: 550 [2021-11-12 23:29:42,166 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 23:29:42,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:29:42,166 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 154 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1041.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.94ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1194.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:42,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 0 Invalid, 431 Unknown, 0 Unchecked, 1.94ms Time], IncrementalHoareTripleChecker [16 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 1194.85ms Time] [2021-11-12 23:29:42,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 23:29:42,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 342. [2021-11-12 23:29:42,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.3929618768328447) internal successors, (1157), 341 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1157 transitions. [2021-11-12 23:29:42,173 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1157 transitions. Word has length 24 [2021-11-12 23:29:42,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:42,173 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1157 transitions. [2021-11-12 23:29:42,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1157 transitions. [2021-11-12 23:29:42,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:42,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:42,174 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:42,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (156)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:42,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:42,375 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1653940593, now seen corresponding path program 67 times [2021-11-12 23:29:42,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:42,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449593665] [2021-11-12 23:29:42,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:29:42,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:42,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:42,376 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:42,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2021-11-12 23:29:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:42,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:29:42,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:43,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:43,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:43,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449593665] [2021-11-12 23:29:43,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449593665] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:29:43,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:29:43,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:29:43,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354463719] [2021-11-12 23:29:43,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:43,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:29:43,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:43,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:29:43,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:43,769 INFO L87 Difference]: Start difference. First operand 342 states and 1157 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:44,950 INFO L93 Difference]: Finished difference Result 518 states and 1668 transitions. [2021-11-12 23:29:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:44,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:44,952 INFO L225 Difference]: With dead ends: 518 [2021-11-12 23:29:44,952 INFO L226 Difference]: Without dead ends: 518 [2021-11-12 23:29:44,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:29:44,952 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 709.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 809.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:44,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 203 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [6 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 809.32ms Time] [2021-11-12 23:29:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-12 23:29:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 340. [2021-11-12 23:29:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.398230088495575) internal successors, (1152), 339 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1152 transitions. [2021-11-12 23:29:44,959 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1152 transitions. Word has length 24 [2021-11-12 23:29:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:44,960 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1152 transitions. [2021-11-12 23:29:44,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1152 transitions. [2021-11-12 23:29:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:44,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:44,961 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:44,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (157)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:45,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:45,161 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:45,161 INFO L85 PathProgramCache]: Analyzing trace with hash -725058597, now seen corresponding path program 68 times [2021-11-12 23:29:45,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:45,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166692612] [2021-11-12 23:29:45,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:29:45,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:45,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:45,163 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:45,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2021-11-12 23:29:45,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:29:45,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:45,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:29:45,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:45,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:46,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:46,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166692612] [2021-11-12 23:29:46,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166692612] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:29:46,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:29:46,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:29:46,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280176360] [2021-11-12 23:29:46,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:46,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:29:46,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:46,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:29:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:46,898 INFO L87 Difference]: Start difference. First operand 340 states and 1152 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:48,467 INFO L93 Difference]: Finished difference Result 568 states and 1790 transitions. [2021-11-12 23:29:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:48,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:48,469 INFO L225 Difference]: With dead ends: 568 [2021-11-12 23:29:48,469 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 23:29:48,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:29:48,469 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 953.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1081.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:48,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [6 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 1081.19ms Time] [2021-11-12 23:29:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 23:29:48,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2021-11-12 23:29:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.422740524781341) internal successors, (1174), 343 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1174 transitions. [2021-11-12 23:29:48,476 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1174 transitions. Word has length 24 [2021-11-12 23:29:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:48,476 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1174 transitions. [2021-11-12 23:29:48,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1174 transitions. [2021-11-12 23:29:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:48,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:48,477 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:48,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (158)] Ended with exit code 0 [2021-11-12 23:29:48,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:48,677 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:48,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash 130248057, now seen corresponding path program 69 times [2021-11-12 23:29:48,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:48,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667806110] [2021-11-12 23:29:48,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:29:48,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:48,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:48,679 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:48,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (159)] Waiting until timeout for monitored process [2021-11-12 23:29:48,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:29:48,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:48,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:29:48,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:49,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:50,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:50,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667806110] [2021-11-12 23:29:50,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667806110] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:29:50,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:29:50,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:29:50,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668438451] [2021-11-12 23:29:50,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:50,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:29:50,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:50,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:29:50,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:50,444 INFO L87 Difference]: Start difference. First operand 344 states and 1174 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:51,895 INFO L93 Difference]: Finished difference Result 540 states and 1730 transitions. [2021-11-12 23:29:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:51,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:51,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:51,897 INFO L225 Difference]: With dead ends: 540 [2021-11-12 23:29:51,897 INFO L226 Difference]: Without dead ends: 540 [2021-11-12 23:29:51,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:29:51,897 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 862.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.19ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 975.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:51,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 228 Unknown, 0 Unchecked, 1.19ms Time], IncrementalHoareTripleChecker [6 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 975.02ms Time] [2021-11-12 23:29:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-12 23:29:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 340. [2021-11-12 23:29:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.398230088495575) internal successors, (1152), 339 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:51,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1152 transitions. [2021-11-12 23:29:51,905 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1152 transitions. Word has length 24 [2021-11-12 23:29:51,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:51,905 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1152 transitions. [2021-11-12 23:29:51,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:51,905 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1152 transitions. [2021-11-12 23:29:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:51,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:51,906 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:51,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (159)] Ended with exit code 0 [2021-11-12 23:29:52,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:52,106 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:52,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:52,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1314599112, now seen corresponding path program 70 times [2021-11-12 23:29:52,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:52,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795676170] [2021-11-12 23:29:52,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:29:52,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:52,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:52,108 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:52,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (160)] Waiting until timeout for monitored process [2021-11-12 23:29:52,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:29:52,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:52,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:52,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:53,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:53,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795676170] [2021-11-12 23:29:53,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795676170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:53,532 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:53,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:53,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144000304] [2021-11-12 23:29:53,532 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:53,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:53,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:53,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:53,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:53,533 INFO L87 Difference]: Start difference. First operand 340 states and 1152 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:54,825 INFO L93 Difference]: Finished difference Result 536 states and 1688 transitions. [2021-11-12 23:29:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:54,826 INFO L225 Difference]: With dead ends: 536 [2021-11-12 23:29:54,827 INFO L226 Difference]: Without dead ends: 536 [2021-11-12 23:29:54,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:29:54,827 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1079.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1224.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:54,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 375 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [7 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 1224.95ms Time] [2021-11-12 23:29:54,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-12 23:29:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 340. [2021-11-12 23:29:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.398230088495575) internal successors, (1152), 339 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1152 transitions. [2021-11-12 23:29:54,833 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1152 transitions. Word has length 24 [2021-11-12 23:29:54,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:54,833 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1152 transitions. [2021-11-12 23:29:54,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1152 transitions. [2021-11-12 23:29:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:54,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:54,834 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:54,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (160)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:55,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:55,035 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:55,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2062417994, now seen corresponding path program 71 times [2021-11-12 23:29:55,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:55,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470335694] [2021-11-12 23:29:55,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:29:55,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:55,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:55,036 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:55,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (161)] Waiting until timeout for monitored process [2021-11-12 23:29:55,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:29:55,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:55,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:55,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:55,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:56,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:56,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470335694] [2021-11-12 23:29:56,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470335694] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:56,374 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:56,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:29:56,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787173933] [2021-11-12 23:29:56,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:56,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:29:56,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:56,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:29:56,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:56,375 INFO L87 Difference]: Start difference. First operand 340 states and 1152 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:57,552 INFO L93 Difference]: Finished difference Result 522 states and 1664 transitions. [2021-11-12 23:29:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:57,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:57,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:57,554 INFO L225 Difference]: With dead ends: 522 [2021-11-12 23:29:57,554 INFO L226 Difference]: Without dead ends: 522 [2021-11-12 23:29:57,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:29:57,554 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 976.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1116.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:57,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 289 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [10 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 1116.66ms Time] [2021-11-12 23:29:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-12 23:29:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 324. [2021-11-12 23:29:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.365325077399381) internal successors, (1087), 323 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1087 transitions. [2021-11-12 23:29:57,561 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1087 transitions. Word has length 24 [2021-11-12 23:29:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:57,561 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1087 transitions. [2021-11-12 23:29:57,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1087 transitions. [2021-11-12 23:29:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:57,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:57,562 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:57,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (161)] Ended with exit code 0 [2021-11-12 23:29:57,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:57,762 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:29:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1030567661, now seen corresponding path program 70 times [2021-11-12 23:29:57,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:57,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811842094] [2021-11-12 23:29:57,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:29:57,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:57,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:57,764 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:57,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (162)] Waiting until timeout for monitored process [2021-11-12 23:29:57,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:29:57,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:57,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:29:57,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:58,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:58,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:58,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811842094] [2021-11-12 23:29:58,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811842094] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:29:58,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:29:58,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:29:58,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167580400] [2021-11-12 23:29:58,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:58,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:29:58,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:29:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:29:58,651 INFO L87 Difference]: Start difference. First operand 324 states and 1087 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:59,811 INFO L93 Difference]: Finished difference Result 590 states and 1873 transitions. [2021-11-12 23:29:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:29:59,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:29:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:59,813 INFO L225 Difference]: With dead ends: 590 [2021-11-12 23:29:59,813 INFO L226 Difference]: Without dead ends: 590 [2021-11-12 23:29:59,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:29:59,813 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 813.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 930.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:59,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 324 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [5 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 930.81ms Time] [2021-11-12 23:29:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-12 23:29:59,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 332. [2021-11-12 23:29:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.3867069486404833) internal successors, (1121), 331 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1121 transitions. [2021-11-12 23:29:59,821 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1121 transitions. Word has length 24 [2021-11-12 23:29:59,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:59,821 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1121 transitions. [2021-11-12 23:29:59,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1121 transitions. [2021-11-12 23:29:59,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:29:59,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:59,822 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:59,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (162)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:00,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:00,022 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:00,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash -251990415, now seen corresponding path program 71 times [2021-11-12 23:30:00,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:00,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694513987] [2021-11-12 23:30:00,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:30:00,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:00,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:00,024 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:00,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (163)] Waiting until timeout for monitored process [2021-11-12 23:30:00,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:30:00,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:00,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:30:00,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:00,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:01,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:01,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694513987] [2021-11-12 23:30:01,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694513987] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:01,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:01,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:30:01,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961659455] [2021-11-12 23:30:01,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:01,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:30:01,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:01,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:30:01,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:01,294 INFO L87 Difference]: Start difference. First operand 332 states and 1121 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:03,011 INFO L93 Difference]: Finished difference Result 556 states and 1785 transitions. [2021-11-12 23:30:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:03,014 INFO L225 Difference]: With dead ends: 556 [2021-11-12 23:30:03,014 INFO L226 Difference]: Without dead ends: 556 [2021-11-12 23:30:03,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:30:03,014 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1125.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1283.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:03,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 329 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [5 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 1283.92ms Time] [2021-11-12 23:30:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-12 23:30:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 336. [2021-11-12 23:30:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.4119402985074627) internal successors, (1143), 335 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1143 transitions. [2021-11-12 23:30:03,022 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1143 transitions. Word has length 24 [2021-11-12 23:30:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:03,022 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1143 transitions. [2021-11-12 23:30:03,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1143 transitions. [2021-11-12 23:30:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:03,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:03,023 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:03,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (163)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:03,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:03,224 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash 603316239, now seen corresponding path program 72 times [2021-11-12 23:30:03,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:03,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70857727] [2021-11-12 23:30:03,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:30:03,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:03,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:03,225 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:03,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2021-11-12 23:30:03,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:30:03,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:03,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:30:03,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:03,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:04,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:04,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70857727] [2021-11-12 23:30:04,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70857727] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:04,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:04,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:30:04,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819742642] [2021-11-12 23:30:04,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:04,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:30:04,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:04,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:30:04,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:04,623 INFO L87 Difference]: Start difference. First operand 336 states and 1143 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:06,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:06,039 INFO L93 Difference]: Finished difference Result 524 states and 1715 transitions. [2021-11-12 23:30:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:06,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:06,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:06,041 INFO L225 Difference]: With dead ends: 524 [2021-11-12 23:30:06,041 INFO L226 Difference]: Without dead ends: 524 [2021-11-12 23:30:06,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:30:06,041 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 946.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1077.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:06,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 329 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [5 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 1077.13ms Time] [2021-11-12 23:30:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-12 23:30:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 320. [2021-11-12 23:30:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.341692789968652) internal successors, (1066), 319 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1066 transitions. [2021-11-12 23:30:06,048 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1066 transitions. Word has length 24 [2021-11-12 23:30:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:06,048 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1066 transitions. [2021-11-12 23:30:06,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1066 transitions. [2021-11-12 23:30:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:06,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:06,049 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:06,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (164)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:06,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:06,249 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1359246914, now seen corresponding path program 72 times [2021-11-12 23:30:06,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:06,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309530675] [2021-11-12 23:30:06,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:30:06,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:06,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:06,251 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:06,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (165)] Waiting until timeout for monitored process [2021-11-12 23:30:06,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:30:06,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:06,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:06,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:06,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:07,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:07,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309530675] [2021-11-12 23:30:07,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309530675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:07,220 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:07,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:30:07,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980834383] [2021-11-12 23:30:07,220 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:07,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:30:07,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:07,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:30:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:30:07,221 INFO L87 Difference]: Start difference. First operand 320 states and 1066 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:08,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:08,073 INFO L93 Difference]: Finished difference Result 412 states and 1295 transitions. [2021-11-12 23:30:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:08,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:08,074 INFO L225 Difference]: With dead ends: 412 [2021-11-12 23:30:08,075 INFO L226 Difference]: Without dead ends: 412 [2021-11-12 23:30:08,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:30:08,075 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 560.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 645.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:08,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 249 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 645.17ms Time] [2021-11-12 23:30:08,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-12 23:30:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 314. [2021-11-12 23:30:08,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3610223642172525) internal successors, (1052), 313 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1052 transitions. [2021-11-12 23:30:08,080 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1052 transitions. Word has length 24 [2021-11-12 23:30:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:08,080 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1052 transitions. [2021-11-12 23:30:08,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1052 transitions. [2021-11-12 23:30:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:08,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:08,081 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:08,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (165)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:08,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:08,282 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1538335542, now seen corresponding path program 73 times [2021-11-12 23:30:08,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:08,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314763283] [2021-11-12 23:30:08,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:30:08,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:08,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:08,283 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:08,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (166)] Waiting until timeout for monitored process [2021-11-12 23:30:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:08,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:08,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:08,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:08,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:08,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314763283] [2021-11-12 23:30:08,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314763283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:08,978 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:08,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:30:08,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496018363] [2021-11-12 23:30:08,978 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:08,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:30:08,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:08,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:30:08,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:30:08,979 INFO L87 Difference]: Start difference. First operand 314 states and 1052 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:09,775 INFO L93 Difference]: Finished difference Result 434 states and 1330 transitions. [2021-11-12 23:30:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:09,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:09,777 INFO L225 Difference]: With dead ends: 434 [2021-11-12 23:30:09,777 INFO L226 Difference]: Without dead ends: 428 [2021-11-12 23:30:09,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:30:09,778 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 98 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 521.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.05ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 594.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:09,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 0 Invalid, 251 Unknown, 0 Unchecked, 1.05ms Time], IncrementalHoareTripleChecker [5 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 594.38ms Time] [2021-11-12 23:30:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-12 23:30:09,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 328. [2021-11-12 23:30:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.330275229357798) internal successors, (1089), 327 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1089 transitions. [2021-11-12 23:30:09,784 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1089 transitions. Word has length 24 [2021-11-12 23:30:09,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:09,784 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1089 transitions. [2021-11-12 23:30:09,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1089 transitions. [2021-11-12 23:30:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:09,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:09,785 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:09,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (166)] Ended with exit code 0 [2021-11-12 23:30:09,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:09,986 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:09,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:09,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2109790348, now seen corresponding path program 74 times [2021-11-12 23:30:09,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:09,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095603951] [2021-11-12 23:30:09,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:30:09,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:09,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:09,987 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:09,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (167)] Waiting until timeout for monitored process [2021-11-12 23:30:10,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:30:10,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:10,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:10,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:10,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095603951] [2021-11-12 23:30:10,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095603951] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:10,837 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:10,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:30:10,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230163417] [2021-11-12 23:30:10,837 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:10,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:30:10,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:30:10,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:30:10,838 INFO L87 Difference]: Start difference. First operand 328 states and 1089 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:11,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:11,784 INFO L93 Difference]: Finished difference Result 432 states and 1333 transitions. [2021-11-12 23:30:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:11,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:11,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:11,786 INFO L225 Difference]: With dead ends: 432 [2021-11-12 23:30:11,786 INFO L226 Difference]: Without dead ends: 432 [2021-11-12 23:30:11,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:30:11,787 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 657.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 749.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:11,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 330 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [4 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 749.78ms Time] [2021-11-12 23:30:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-12 23:30:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 326. [2021-11-12 23:30:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.335384615384615) internal successors, (1084), 325 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1084 transitions. [2021-11-12 23:30:11,793 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1084 transitions. Word has length 24 [2021-11-12 23:30:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:11,793 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1084 transitions. [2021-11-12 23:30:11,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1084 transitions. [2021-11-12 23:30:11,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:11,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:11,794 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:11,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (167)] Ended with exit code 0 [2021-11-12 23:30:11,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:11,995 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:11,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:11,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1010447208, now seen corresponding path program 75 times [2021-11-12 23:30:11,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:11,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864713025] [2021-11-12 23:30:11,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:30:11,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:11,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:11,996 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:11,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (168)] Waiting until timeout for monitored process [2021-11-12 23:30:12,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:30:12,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:12,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:12,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:12,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:12,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:12,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864713025] [2021-11-12 23:30:12,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864713025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:12,702 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:12,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:30:12,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323386644] [2021-11-12 23:30:12,702 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:12,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:30:12,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:30:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:30:12,703 INFO L87 Difference]: Start difference. First operand 326 states and 1084 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:13,630 INFO L93 Difference]: Finished difference Result 416 states and 1306 transitions. [2021-11-12 23:30:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:13,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:13,632 INFO L225 Difference]: With dead ends: 416 [2021-11-12 23:30:13,632 INFO L226 Difference]: Without dead ends: 416 [2021-11-12 23:30:13,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:30:13,632 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 668.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 767.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:13,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 375 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [2 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 767.44ms Time] [2021-11-12 23:30:13,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-12 23:30:13,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 314. [2021-11-12 23:30:13,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3610223642172525) internal successors, (1052), 313 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1052 transitions. [2021-11-12 23:30:13,637 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1052 transitions. Word has length 24 [2021-11-12 23:30:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:13,638 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1052 transitions. [2021-11-12 23:30:13,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:13,638 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1052 transitions. [2021-11-12 23:30:13,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:13,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:13,638 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:13,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (168)] Ended with exit code 0 [2021-11-12 23:30:13,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:13,839 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:13,839 INFO L85 PathProgramCache]: Analyzing trace with hash 686727636, now seen corresponding path program 76 times [2021-11-12 23:30:13,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:13,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187224532] [2021-11-12 23:30:13,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:30:13,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:13,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:13,840 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:13,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (169)] Waiting until timeout for monitored process [2021-11-12 23:30:13,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:30:13,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:13,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:13,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:14,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:14,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:14,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187224532] [2021-11-12 23:30:14,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187224532] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:14,976 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:14,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:30:14,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67100521] [2021-11-12 23:30:14,976 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:14,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:14,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:14,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:14,977 INFO L87 Difference]: Start difference. First operand 314 states and 1052 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:16,069 INFO L93 Difference]: Finished difference Result 550 states and 1698 transitions. [2021-11-12 23:30:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:16,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:16,071 INFO L225 Difference]: With dead ends: 550 [2021-11-12 23:30:16,072 INFO L226 Difference]: Without dead ends: 544 [2021-11-12 23:30:16,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:30:16,072 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 830.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 946.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:16,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 347 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [9 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 946.51ms Time] [2021-11-12 23:30:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-12 23:30:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 330. [2021-11-12 23:30:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.386018237082067) internal successors, (1114), 329 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1114 transitions. [2021-11-12 23:30:16,079 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1114 transitions. Word has length 24 [2021-11-12 23:30:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:16,079 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 1114 transitions. [2021-11-12 23:30:16,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1114 transitions. [2021-11-12 23:30:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:16,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:16,080 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:16,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (169)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:16,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:16,281 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:16,281 INFO L85 PathProgramCache]: Analyzing trace with hash 115272830, now seen corresponding path program 77 times [2021-11-12 23:30:16,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:16,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461953513] [2021-11-12 23:30:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:30:16,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:16,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:16,282 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:16,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2021-11-12 23:30:16,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:30:16,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:16,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:16,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:16,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:17,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:17,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461953513] [2021-11-12 23:30:17,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461953513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:17,559 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:17,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:30:17,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773979976] [2021-11-12 23:30:17,560 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:17,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:17,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:17,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:17,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:17,560 INFO L87 Difference]: Start difference. First operand 330 states and 1114 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:18,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:18,887 INFO L93 Difference]: Finished difference Result 554 states and 1718 transitions. [2021-11-12 23:30:18,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:18,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:18,889 INFO L225 Difference]: With dead ends: 554 [2021-11-12 23:30:18,889 INFO L226 Difference]: Without dead ends: 554 [2021-11-12 23:30:18,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:30:18,889 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1043.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1186.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:18,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 421 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [9 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 1186.63ms Time] [2021-11-12 23:30:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-12 23:30:18,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 328. [2021-11-12 23:30:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.3914373088685017) internal successors, (1109), 327 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1109 transitions. [2021-11-12 23:30:18,896 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1109 transitions. Word has length 24 [2021-11-12 23:30:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:18,896 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1109 transitions. [2021-11-12 23:30:18,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1109 transitions. [2021-11-12 23:30:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:18,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:18,897 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:18,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (170)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:19,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:19,098 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:19,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1999924478, now seen corresponding path program 78 times [2021-11-12 23:30:19,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:19,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112499439] [2021-11-12 23:30:19,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:30:19,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:19,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:19,099 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:19,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (171)] Waiting until timeout for monitored process [2021-11-12 23:30:19,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:30:19,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:19,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:19,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:19,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:20,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:20,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112499439] [2021-11-12 23:30:20,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112499439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:20,300 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:20,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:30:20,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799610494] [2021-11-12 23:30:20,300 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:20,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:20,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:20,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:20,300 INFO L87 Difference]: Start difference. First operand 328 states and 1109 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:21,658 INFO L93 Difference]: Finished difference Result 532 states and 1662 transitions. [2021-11-12 23:30:21,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:21,659 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:21,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:21,660 INFO L225 Difference]: With dead ends: 532 [2021-11-12 23:30:21,660 INFO L226 Difference]: Without dead ends: 526 [2021-11-12 23:30:21,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:30:21,661 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1067.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1212.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:21,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 461 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [9 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1212.41ms Time] [2021-11-12 23:30:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-12 23:30:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 336. [2021-11-12 23:30:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.4119402985074627) internal successors, (1143), 335 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1143 transitions. [2021-11-12 23:30:21,668 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1143 transitions. Word has length 24 [2021-11-12 23:30:21,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:21,669 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1143 transitions. [2021-11-12 23:30:21,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1143 transitions. [2021-11-12 23:30:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:21,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:21,669 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:21,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (171)] Ended with exit code 0 [2021-11-12 23:30:21,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:21,870 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:21,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:21,871 INFO L85 PathProgramCache]: Analyzing trace with hash 351458789, now seen corresponding path program 73 times [2021-11-12 23:30:21,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:21,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888578293] [2021-11-12 23:30:21,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:30:21,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:21,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:21,872 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:21,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (172)] Waiting until timeout for monitored process [2021-11-12 23:30:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:22,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:30:22,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:22,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:23,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:23,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888578293] [2021-11-12 23:30:23,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888578293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:23,303 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:23,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:30:23,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220624029] [2021-11-12 23:30:23,303 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:23,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:23,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:23,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:23,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:23,304 INFO L87 Difference]: Start difference. First operand 336 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:25,182 INFO L93 Difference]: Finished difference Result 482 states and 1581 transitions. [2021-11-12 23:30:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:30:25,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:25,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:25,184 INFO L225 Difference]: With dead ends: 482 [2021-11-12 23:30:25,184 INFO L226 Difference]: Without dead ends: 472 [2021-11-12 23:30:25,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:30:25,184 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 160 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 989.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1124.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:25,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 0 Invalid, 387 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [21 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 1124.21ms Time] [2021-11-12 23:30:25,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-12 23:30:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 346. [2021-11-12 23:30:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.4405797101449274) internal successors, (1187), 345 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1187 transitions. [2021-11-12 23:30:25,191 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1187 transitions. Word has length 24 [2021-11-12 23:30:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:25,191 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1187 transitions. [2021-11-12 23:30:25,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1187 transitions. [2021-11-12 23:30:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:25,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:25,192 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:25,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (172)] Ended with exit code 0 [2021-11-12 23:30:25,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:25,392 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1933033915, now seen corresponding path program 74 times [2021-11-12 23:30:25,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:25,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353558612] [2021-11-12 23:30:25,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:30:25,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:25,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:25,394 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:25,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (173)] Waiting until timeout for monitored process [2021-11-12 23:30:25,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:30:25,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:25,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:30:25,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:26,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:26,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:26,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353558612] [2021-11-12 23:30:26,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353558612] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:26,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:26,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:30:26,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433043905] [2021-11-12 23:30:26,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:26,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:30:26,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:26,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:30:26,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:26,740 INFO L87 Difference]: Start difference. First operand 346 states and 1187 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:28,131 INFO L93 Difference]: Finished difference Result 500 states and 1616 transitions. [2021-11-12 23:30:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:28,133 INFO L225 Difference]: With dead ends: 500 [2021-11-12 23:30:28,133 INFO L226 Difference]: Without dead ends: 500 [2021-11-12 23:30:28,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:30:28,134 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 927.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1041.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:28,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 281 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1041.04ms Time] [2021-11-12 23:30:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-12 23:30:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 342. [2021-11-12 23:30:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.4252199413489737) internal successors, (1168), 341 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1168 transitions. [2021-11-12 23:30:28,140 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1168 transitions. Word has length 24 [2021-11-12 23:30:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:28,140 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1168 transitions. [2021-11-12 23:30:28,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:28,140 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1168 transitions. [2021-11-12 23:30:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:28,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:28,141 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:28,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (173)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:28,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:28,342 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:28,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:28,342 INFO L85 PathProgramCache]: Analyzing trace with hash 805637822, now seen corresponding path program 79 times [2021-11-12 23:30:28,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:28,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835967459] [2021-11-12 23:30:28,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:30:28,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:28,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:28,343 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:28,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (174)] Waiting until timeout for monitored process [2021-11-12 23:30:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:28,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:28,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:28,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:29,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:29,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835967459] [2021-11-12 23:30:29,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835967459] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:29,451 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:29,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:30:29,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970183013] [2021-11-12 23:30:29,451 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:29,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:29,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:29,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:29,452 INFO L87 Difference]: Start difference. First operand 342 states and 1168 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:30,542 INFO L93 Difference]: Finished difference Result 532 states and 1688 transitions. [2021-11-12 23:30:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:30,544 INFO L225 Difference]: With dead ends: 532 [2021-11-12 23:30:30,544 INFO L226 Difference]: Without dead ends: 532 [2021-11-12 23:30:30,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:30:30,544 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 848.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.35ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 967.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:30,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 314 Unknown, 0 Unchecked, 1.35ms Time], IncrementalHoareTripleChecker [13 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 967.04ms Time] [2021-11-12 23:30:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-12 23:30:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 338. [2021-11-12 23:30:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.4332344213649852) internal successors, (1157), 337 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1157 transitions. [2021-11-12 23:30:30,551 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1157 transitions. Word has length 24 [2021-11-12 23:30:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:30,551 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1157 transitions. [2021-11-12 23:30:30,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1157 transitions. [2021-11-12 23:30:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:30,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:30,552 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:30,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (174)] Ended with exit code 0 [2021-11-12 23:30:30,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:30,752 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:30,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1962399747, now seen corresponding path program 75 times [2021-11-12 23:30:30,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:30,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528641553] [2021-11-12 23:30:30,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:30:30,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:30,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:30,754 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:30,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (175)] Waiting until timeout for monitored process [2021-11-12 23:30:30,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:30:30,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:30,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:30:30,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:31,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:32,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:32,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528641553] [2021-11-12 23:30:32,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528641553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:32,182 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:32,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:30:32,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70633291] [2021-11-12 23:30:32,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:32,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:32,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:32,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:32,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:32,182 INFO L87 Difference]: Start difference. First operand 338 states and 1157 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:34,173 INFO L93 Difference]: Finished difference Result 488 states and 1608 transitions. [2021-11-12 23:30:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:30:34,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:34,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:34,175 INFO L225 Difference]: With dead ends: 488 [2021-11-12 23:30:34,175 INFO L226 Difference]: Without dead ends: 484 [2021-11-12 23:30:34,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:30:34,176 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 123 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1054.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1196.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:34,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 0 Invalid, 411 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [15 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 1196.95ms Time] [2021-11-12 23:30:34,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-12 23:30:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 342. [2021-11-12 23:30:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.434017595307918) internal successors, (1171), 341 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1171 transitions. [2021-11-12 23:30:34,182 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1171 transitions. Word has length 24 [2021-11-12 23:30:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:34,182 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1171 transitions. [2021-11-12 23:30:34,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1171 transitions. [2021-11-12 23:30:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:34,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:34,183 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:34,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (175)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:34,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:34,384 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 849016729, now seen corresponding path program 76 times [2021-11-12 23:30:34,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:34,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429775799] [2021-11-12 23:30:34,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:30:34,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:34,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:34,385 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:34,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2021-11-12 23:30:34,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:30:34,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:34,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:30:34,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:35,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:35,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:35,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429775799] [2021-11-12 23:30:35,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429775799] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:35,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:35,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:30:35,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44270819] [2021-11-12 23:30:35,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:35,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:30:35,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:35,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:30:35,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:35,820 INFO L87 Difference]: Start difference. First operand 342 states and 1171 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:37,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:37,524 INFO L93 Difference]: Finished difference Result 568 states and 1773 transitions. [2021-11-12 23:30:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:30:37,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:37,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:37,526 INFO L225 Difference]: With dead ends: 568 [2021-11-12 23:30:37,526 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 23:30:37,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:30:37,527 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1033.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.28ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1158.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:37,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 1.28ms Time], IncrementalHoareTripleChecker [12 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1158.07ms Time] [2021-11-12 23:30:37,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 23:30:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 338. [2021-11-12 23:30:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.4332344213649852) internal successors, (1157), 337 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1157 transitions. [2021-11-12 23:30:37,534 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1157 transitions. Word has length 24 [2021-11-12 23:30:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:37,534 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1157 transitions. [2021-11-12 23:30:37,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1157 transitions. [2021-11-12 23:30:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:37,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:37,535 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:37,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (176)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:37,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:37,735 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:37,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1777898725, now seen corresponding path program 77 times [2021-11-12 23:30:37,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:37,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871599741] [2021-11-12 23:30:37,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:30:37,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:37,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:37,737 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:37,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (177)] Waiting until timeout for monitored process [2021-11-12 23:30:37,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:30:37,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:37,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:30:37,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:38,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:39,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:39,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871599741] [2021-11-12 23:30:39,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871599741] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:39,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:39,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:30:39,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468809305] [2021-11-12 23:30:39,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:39,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:30:39,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:39,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:30:39,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:39,310 INFO L87 Difference]: Start difference. First operand 338 states and 1157 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:40,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:40,920 INFO L93 Difference]: Finished difference Result 572 states and 1795 transitions. [2021-11-12 23:30:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:40,922 INFO L225 Difference]: With dead ends: 572 [2021-11-12 23:30:40,922 INFO L226 Difference]: Without dead ends: 572 [2021-11-12 23:30:40,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:30:40,923 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1061.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1182.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:40,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 253 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [8 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 1182.47ms Time] [2021-11-12 23:30:40,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-12 23:30:40,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 342. [2021-11-12 23:30:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.4574780058651027) internal successors, (1179), 341 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1179 transitions. [2021-11-12 23:30:40,932 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1179 transitions. Word has length 24 [2021-11-12 23:30:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:40,932 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1179 transitions. [2021-11-12 23:30:40,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:40,932 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1179 transitions. [2021-11-12 23:30:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:40,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:40,933 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:40,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (177)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:41,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:41,134 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:41,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1661761917, now seen corresponding path program 78 times [2021-11-12 23:30:41,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:41,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128843668] [2021-11-12 23:30:41,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:30:41,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:41,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:41,135 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:41,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (178)] Waiting until timeout for monitored process [2021-11-12 23:30:41,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:30:41,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:41,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:30:41,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:41,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:42,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:42,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128843668] [2021-11-12 23:30:42,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128843668] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:42,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:42,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:30:42,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305055179] [2021-11-12 23:30:42,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:42,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:30:42,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:42,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:30:42,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:42,798 INFO L87 Difference]: Start difference. First operand 342 states and 1179 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:44,571 INFO L93 Difference]: Finished difference Result 542 states and 1729 transitions. [2021-11-12 23:30:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:44,573 INFO L225 Difference]: With dead ends: 542 [2021-11-12 23:30:44,574 INFO L226 Difference]: Without dead ends: 542 [2021-11-12 23:30:44,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:30:44,574 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1102.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.38ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1229.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:44,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 265 Unknown, 0 Unchecked, 1.38ms Time], IncrementalHoareTripleChecker [8 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1229.84ms Time] [2021-11-12 23:30:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-12 23:30:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 336. [2021-11-12 23:30:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.4149253731343285) internal successors, (1144), 335 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1144 transitions. [2021-11-12 23:30:44,581 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1144 transitions. Word has length 24 [2021-11-12 23:30:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:44,581 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1144 transitions. [2021-11-12 23:30:44,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1144 transitions. [2021-11-12 23:30:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:44,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:44,581 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:44,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (178)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:44,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:44,782 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:44,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:44,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1188358210, now seen corresponding path program 80 times [2021-11-12 23:30:44,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:44,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764698120] [2021-11-12 23:30:44,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:30:44,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:44,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:44,784 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:44,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2021-11-12 23:30:44,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:30:44,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:44,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:44,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:45,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:46,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:46,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764698120] [2021-11-12 23:30:46,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764698120] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:46,164 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:46,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:30:46,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187052006] [2021-11-12 23:30:46,164 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:46,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:46,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:46,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:46,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:46,165 INFO L87 Difference]: Start difference. First operand 336 states and 1144 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:47,211 INFO L93 Difference]: Finished difference Result 574 states and 1794 transitions. [2021-11-12 23:30:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:47,213 INFO L225 Difference]: With dead ends: 574 [2021-11-12 23:30:47,213 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 23:30:47,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:30:47,214 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 860.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.25ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 976.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:47,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 293 Unknown, 0 Unchecked, 1.25ms Time], IncrementalHoareTripleChecker [8 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 976.59ms Time] [2021-11-12 23:30:47,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 23:30:47,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 340. [2021-11-12 23:30:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.43952802359882) internal successors, (1166), 339 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1166 transitions. [2021-11-12 23:30:47,221 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1166 transitions. Word has length 24 [2021-11-12 23:30:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:47,221 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1166 transitions. [2021-11-12 23:30:47,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1166 transitions. [2021-11-12 23:30:47,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:47,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:47,222 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:47,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (179)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:47,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:47,423 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash 270408020, now seen corresponding path program 81 times [2021-11-12 23:30:47,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:47,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67601497] [2021-11-12 23:30:47,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:30:47,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:47,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:47,424 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:47,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (180)] Waiting until timeout for monitored process [2021-11-12 23:30:47,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:30:47,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:47,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:47,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:48,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:48,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67601497] [2021-11-12 23:30:48,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67601497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:48,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:48,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:30:48,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461936759] [2021-11-12 23:30:48,713 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:48,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:48,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:48,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:48,714 INFO L87 Difference]: Start difference. First operand 340 states and 1166 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:49,861 INFO L93 Difference]: Finished difference Result 574 states and 1794 transitions. [2021-11-12 23:30:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:49,863 INFO L225 Difference]: With dead ends: 574 [2021-11-12 23:30:49,863 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 23:30:49,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:30:49,863 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 946.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1077.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:49,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 306 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [9 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 1077.20ms Time] [2021-11-12 23:30:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 23:30:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 334. [2021-11-12 23:30:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.3963963963963963) internal successors, (1131), 333 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1131 transitions. [2021-11-12 23:30:49,891 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1131 transitions. Word has length 24 [2021-11-12 23:30:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:49,891 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1131 transitions. [2021-11-12 23:30:49,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1131 transitions. [2021-11-12 23:30:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:49,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:49,893 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:49,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (180)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:50,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:50,105 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:50,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:50,106 INFO L85 PathProgramCache]: Analyzing trace with hash 929263390, now seen corresponding path program 82 times [2021-11-12 23:30:50,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:50,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992219867] [2021-11-12 23:30:50,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:30:50,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:50,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:50,107 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:50,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (181)] Waiting until timeout for monitored process [2021-11-12 23:30:50,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:30:50,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:50,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:50,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:51,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:51,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992219867] [2021-11-12 23:30:51,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992219867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:51,116 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:51,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:30:51,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093748387] [2021-11-12 23:30:51,116 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:51,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:51,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:51,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:51,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:51,117 INFO L87 Difference]: Start difference. First operand 334 states and 1131 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:52,064 INFO L93 Difference]: Finished difference Result 534 states and 1661 transitions. [2021-11-12 23:30:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:52,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:52,065 INFO L225 Difference]: With dead ends: 534 [2021-11-12 23:30:52,066 INFO L226 Difference]: Without dead ends: 534 [2021-11-12 23:30:52,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:30:52,066 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 706.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 805.70ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:52,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 349 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [7 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 805.70ms Time] [2021-11-12 23:30:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-12 23:30:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 336. [2021-11-12 23:30:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.408955223880597) internal successors, (1142), 335 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1142 transitions. [2021-11-12 23:30:52,073 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1142 transitions. Word has length 24 [2021-11-12 23:30:52,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:52,073 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1142 transitions. [2021-11-12 23:30:52,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:52,073 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1142 transitions. [2021-11-12 23:30:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:52,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:52,074 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:52,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (181)] Ended with exit code 0 [2021-11-12 23:30:52,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:52,274 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:52,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:52,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2028606530, now seen corresponding path program 83 times [2021-11-12 23:30:52,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:52,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289616765] [2021-11-12 23:30:52,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:30:52,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:52,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:52,276 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:52,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2021-11-12 23:30:52,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:30:52,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:52,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:52,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:53,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:53,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289616765] [2021-11-12 23:30:53,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289616765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:53,077 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:53,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:30:53,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551939348] [2021-11-12 23:30:53,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:53,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:30:53,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:30:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:30:53,078 INFO L87 Difference]: Start difference. First operand 336 states and 1142 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:53,948 INFO L93 Difference]: Finished difference Result 532 states and 1671 transitions. [2021-11-12 23:30:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:53,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:53,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:53,950 INFO L225 Difference]: With dead ends: 532 [2021-11-12 23:30:53,950 INFO L226 Difference]: Without dead ends: 532 [2021-11-12 23:30:53,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:30:53,950 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 661.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 753.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:53,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 283 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [7 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 753.28ms Time] [2021-11-12 23:30:53,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-12 23:30:53,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 334. [2021-11-12 23:30:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.4144144144144146) internal successors, (1137), 333 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1137 transitions. [2021-11-12 23:30:53,956 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1137 transitions. Word has length 24 [2021-11-12 23:30:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:53,957 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1137 transitions. [2021-11-12 23:30:53,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1137 transitions. [2021-11-12 23:30:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:53,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:53,957 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:53,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (182)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:54,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:54,158 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:54,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:54,158 INFO L85 PathProgramCache]: Analyzing trace with hash -505884457, now seen corresponding path program 79 times [2021-11-12 23:30:54,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:54,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395450362] [2021-11-12 23:30:54,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:30:54,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:54,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:54,159 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:54,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (183)] Waiting until timeout for monitored process [2021-11-12 23:30:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:54,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:30:54,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:54,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:55,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:55,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395450362] [2021-11-12 23:30:55,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395450362] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:55,148 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:55,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:30:55,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118704184] [2021-11-12 23:30:55,149 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:55,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:55,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:55,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:55,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:55,149 INFO L87 Difference]: Start difference. First operand 334 states and 1137 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:56,691 INFO L93 Difference]: Finished difference Result 452 states and 1490 transitions. [2021-11-12 23:30:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:30:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:56,692 INFO L225 Difference]: With dead ends: 452 [2021-11-12 23:30:56,692 INFO L226 Difference]: Without dead ends: 448 [2021-11-12 23:30:56,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:30:56,693 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 137 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 815.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.52ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 930.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:56,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 0 Invalid, 349 Unknown, 0 Unchecked, 1.52ms Time], IncrementalHoareTripleChecker [15 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 930.35ms Time] [2021-11-12 23:30:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-12 23:30:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 340. [2021-11-12 23:30:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.415929203539823) internal successors, (1158), 339 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1158 transitions. [2021-11-12 23:30:56,699 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1158 transitions. Word has length 24 [2021-11-12 23:30:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:56,699 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1158 transitions. [2021-11-12 23:30:56,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1158 transitions. [2021-11-12 23:30:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:56,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:56,700 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:56,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (183)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:56,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:56,901 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1619267475, now seen corresponding path program 80 times [2021-11-12 23:30:56,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:56,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933531711] [2021-11-12 23:30:56,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:30:56,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:56,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:56,903 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:56,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2021-11-12 23:30:57,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:30:57,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:57,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:30:57,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:57,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:58,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:58,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933531711] [2021-11-12 23:30:58,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933531711] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:58,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:58,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 23:30:58,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133613971] [2021-11-12 23:30:58,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:58,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:30:58,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:30:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:58,180 INFO L87 Difference]: Start difference. First operand 340 states and 1158 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:59,438 INFO L93 Difference]: Finished difference Result 438 states and 1445 transitions. [2021-11-12 23:30:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:59,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:30:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:59,440 INFO L225 Difference]: With dead ends: 438 [2021-11-12 23:30:59,440 INFO L226 Difference]: Without dead ends: 438 [2021-11-12 23:30:59,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:30:59,440 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 850.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 963.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:59,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [8 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 963.14ms Time] [2021-11-12 23:30:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-12 23:30:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 336. [2021-11-12 23:30:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.4149253731343285) internal successors, (1144), 335 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1144 transitions. [2021-11-12 23:30:59,447 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1144 transitions. Word has length 24 [2021-11-12 23:30:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:59,447 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1144 transitions. [2021-11-12 23:30:59,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1144 transitions. [2021-11-12 23:30:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:30:59,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:59,448 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:59,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (184)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:59,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:59,649 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:30:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1057779913, now seen corresponding path program 81 times [2021-11-12 23:30:59,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:59,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271171614] [2021-11-12 23:30:59,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:30:59,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:59,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:59,650 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:59,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (185)] Waiting until timeout for monitored process [2021-11-12 23:30:59,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:30:59,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:59,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:30:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:00,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:00,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:00,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271171614] [2021-11-12 23:31:00,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271171614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:00,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [86919735] [2021-11-12 23:31:00,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:31:00,701 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:00,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:00,703 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:00,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (186)] Waiting until timeout for monitored process [2021-11-12 23:31:01,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:31:01,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:01,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:01,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:01,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:01,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [86919735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:01,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840332705] [2021-11-12 23:31:01,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:31:01,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:01,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:31:01,835 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:31:01,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-11-12 23:31:01,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:31:01,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:02,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:31:02,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:02,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:02,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840332705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:02,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:31:02,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-12 23:31:02,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008180136] [2021-11-12 23:31:02,910 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:31:02,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:31:02,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:02,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:31:02,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:31:02,911 INFO L87 Difference]: Start difference. First operand 336 states and 1144 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:05,058 INFO L93 Difference]: Finished difference Result 534 states and 1676 transitions. [2021-11-12 23:31:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:31:05,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:05,059 INFO L225 Difference]: With dead ends: 534 [2021-11-12 23:31:05,060 INFO L226 Difference]: Without dead ends: 534 [2021-11-12 23:31:05,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:31:05,060 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1388.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.29ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1581.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:05,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 724 Unknown, 0 Unchecked, 3.29ms Time], IncrementalHoareTripleChecker [20 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1581.00ms Time] [2021-11-12 23:31:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-12 23:31:05,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 334. [2021-11-12 23:31:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.4204204204204203) internal successors, (1139), 333 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1139 transitions. [2021-11-12 23:31:05,067 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1139 transitions. Word has length 24 [2021-11-12 23:31:05,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:05,067 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1139 transitions. [2021-11-12 23:31:05,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1139 transitions. [2021-11-12 23:31:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:05,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:05,068 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:05,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (185)] Ended with exit code 0 [2021-11-12 23:31:05,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (186)] Ended with exit code 0 [2021-11-12 23:31:05,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:05,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:05,669 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:05,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:05,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2004143963, now seen corresponding path program 82 times [2021-11-12 23:31:05,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:05,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693932131] [2021-11-12 23:31:05,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:31:05,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:05,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:05,673 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:05,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2021-11-12 23:31:05,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:31:05,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:05,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:05,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:06,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:07,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:07,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693932131] [2021-11-12 23:31:07,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693932131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:07,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [8192845] [2021-11-12 23:31:07,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:31:07,077 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:07,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:07,078 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:07,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (189)] Waiting until timeout for monitored process [2021-11-12 23:31:07,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:31:07,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:07,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:07,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:07,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:08,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [8192845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:08,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810989496] [2021-11-12 23:31:08,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:31:08,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:08,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:31:08,091 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:31:08,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-11-12 23:31:08,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:31:08,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:08,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:08,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:09,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810989496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:09,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:31:09,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-12 23:31:09,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436572947] [2021-11-12 23:31:09,017 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:31:09,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:31:09,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:31:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:31:09,018 INFO L87 Difference]: Start difference. First operand 334 states and 1139 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:11,329 INFO L93 Difference]: Finished difference Result 704 states and 2210 transitions. [2021-11-12 23:31:11,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:31:11,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:11,331 INFO L225 Difference]: With dead ends: 704 [2021-11-12 23:31:11,331 INFO L226 Difference]: Without dead ends: 704 [2021-11-12 23:31:11,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:31:11,332 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 136 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1507.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1702.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:11,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 0 Invalid, 487 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [12 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1702.99ms Time] [2021-11-12 23:31:11,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-12 23:31:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 342. [2021-11-12 23:31:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.4574780058651027) internal successors, (1179), 341 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1179 transitions. [2021-11-12 23:31:11,349 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1179 transitions. Word has length 24 [2021-11-12 23:31:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:11,349 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1179 transitions. [2021-11-12 23:31:11,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1179 transitions. [2021-11-12 23:31:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:11,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:11,351 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:11,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (188)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:11,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-11-12 23:31:11,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (189)] Ended with exit code 0 [2021-11-12 23:31:11,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:11,966 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1435516679, now seen corresponding path program 83 times [2021-11-12 23:31:11,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:11,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247450792] [2021-11-12 23:31:11,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:31:11,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:11,968 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:11,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (191)] Waiting until timeout for monitored process [2021-11-12 23:31:12,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:31:12,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:12,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:12,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:13,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:13,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247450792] [2021-11-12 23:31:13,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247450792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:13,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [532015169] [2021-11-12 23:31:13,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:31:13,398 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:13,399 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:13,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (192)] Waiting until timeout for monitored process [2021-11-12 23:31:13,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:31:13,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:14,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:14,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [532015169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:14,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171926597] [2021-11-12 23:31:14,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:31:14,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:31:14,546 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:31:14,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-11-12 23:31:14,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:31:14,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:14,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:14,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:15,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:15,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171926597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:15,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:31:15,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-12 23:31:15,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156218835] [2021-11-12 23:31:15,561 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:31:15,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:31:15,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:15,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:31:15,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:31:15,562 INFO L87 Difference]: Start difference. First operand 342 states and 1179 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:18,090 INFO L93 Difference]: Finished difference Result 700 states and 2198 transitions. [2021-11-12 23:31:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:31:18,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:18,093 INFO L225 Difference]: With dead ends: 700 [2021-11-12 23:31:18,093 INFO L226 Difference]: Without dead ends: 700 [2021-11-12 23:31:18,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:31:18,093 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 121 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1655.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.60ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1862.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:18,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 0 Invalid, 572 Unknown, 0 Unchecked, 2.60ms Time], IncrementalHoareTripleChecker [11 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 1862.82ms Time] [2021-11-12 23:31:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-12 23:31:18,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 338. [2021-11-12 23:31:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.4332344213649852) internal successors, (1157), 337 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1157 transitions. [2021-11-12 23:31:18,101 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1157 transitions. Word has length 24 [2021-11-12 23:31:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:18,101 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1157 transitions. [2021-11-12 23:31:18,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1157 transitions. [2021-11-12 23:31:18,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:18,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:18,102 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:18,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (192)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:18,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (191)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:18,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:18,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:18,702 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:18,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2135848915, now seen corresponding path program 84 times [2021-11-12 23:31:18,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:18,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74362413] [2021-11-12 23:31:18,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:31:18,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:18,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:18,704 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:18,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (194)] Waiting until timeout for monitored process [2021-11-12 23:31:18,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:31:18,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:18,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:18,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:19,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:19,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:19,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74362413] [2021-11-12 23:31:19,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74362413] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:19,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:31:19,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:31:19,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193012395] [2021-11-12 23:31:19,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:19,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:31:19,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:19,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:31:19,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:31:19,781 INFO L87 Difference]: Start difference. First operand 338 states and 1157 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:20,910 INFO L93 Difference]: Finished difference Result 498 states and 1632 transitions. [2021-11-12 23:31:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:20,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:20,912 INFO L225 Difference]: With dead ends: 498 [2021-11-12 23:31:20,912 INFO L226 Difference]: Without dead ends: 498 [2021-11-12 23:31:20,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:31:20,912 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 784.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 883.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:20,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 256 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 883.64ms Time] [2021-11-12 23:31:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-12 23:31:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 334. [2021-11-12 23:31:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.4204204204204203) internal successors, (1139), 333 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1139 transitions. [2021-11-12 23:31:20,923 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1139 transitions. Word has length 24 [2021-11-12 23:31:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:20,923 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1139 transitions. [2021-11-12 23:31:20,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1139 transitions. [2021-11-12 23:31:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:20,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:20,925 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:20,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (194)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:21,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:21,131 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash 908257182, now seen corresponding path program 84 times [2021-11-12 23:31:21,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:21,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96000351] [2021-11-12 23:31:21,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:31:21,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:21,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:21,133 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:21,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (195)] Waiting until timeout for monitored process [2021-11-12 23:31:21,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:31:21,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:31:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:21,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:22,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:22,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96000351] [2021-11-12 23:31:22,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96000351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:22,452 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:22,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:31:22,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009865905] [2021-11-12 23:31:22,453 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:22,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:31:22,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:22,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:31:22,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:31:22,453 INFO L87 Difference]: Start difference. First operand 334 states and 1139 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:23,467 INFO L93 Difference]: Finished difference Result 522 states and 1652 transitions. [2021-11-12 23:31:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:23,469 INFO L225 Difference]: With dead ends: 522 [2021-11-12 23:31:23,469 INFO L226 Difference]: Without dead ends: 522 [2021-11-12 23:31:23,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:23,470 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 827.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 946.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:23,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 300 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [9 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 946.58ms Time] [2021-11-12 23:31:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-12 23:31:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 336. [2021-11-12 23:31:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.4208955223880597) internal successors, (1146), 335 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1146 transitions. [2021-11-12 23:31:23,476 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1146 transitions. Word has length 24 [2021-11-12 23:31:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:23,476 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1146 transitions. [2021-11-12 23:31:23,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1146 transitions. [2021-11-12 23:31:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:23,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:23,477 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:23,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (195)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:23,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:23,678 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash -9693008, now seen corresponding path program 85 times [2021-11-12 23:31:23,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:23,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521117697] [2021-11-12 23:31:23,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:31:23,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:23,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:23,679 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:23,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (196)] Waiting until timeout for monitored process [2021-11-12 23:31:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:23,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:31:23,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:24,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:24,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:24,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521117697] [2021-11-12 23:31:24,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521117697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:24,733 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:24,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:31:24,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221375488] [2021-11-12 23:31:24,733 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:24,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:31:24,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:31:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:31:24,733 INFO L87 Difference]: Start difference. First operand 336 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:25,800 INFO L93 Difference]: Finished difference Result 500 states and 1606 transitions. [2021-11-12 23:31:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:25,802 INFO L225 Difference]: With dead ends: 500 [2021-11-12 23:31:25,802 INFO L226 Difference]: Without dead ends: 500 [2021-11-12 23:31:25,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:25,802 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 883.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1008.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:25,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 323 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [7 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 1008.24ms Time] [2021-11-12 23:31:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-12 23:31:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 322. [2021-11-12 23:31:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.4080996884735204) internal successors, (1094), 321 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1094 transitions. [2021-11-12 23:31:25,808 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1094 transitions. Word has length 24 [2021-11-12 23:31:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:25,809 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1094 transitions. [2021-11-12 23:31:25,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1094 transitions. [2021-11-12 23:31:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:25,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:25,810 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:25,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (196)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:26,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:26,010 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:26,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:26,010 INFO L85 PathProgramCache]: Analyzing trace with hash 934514942, now seen corresponding path program 86 times [2021-11-12 23:31:26,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:26,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689230085] [2021-11-12 23:31:26,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:31:26,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:26,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:26,012 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:26,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (197)] Waiting until timeout for monitored process [2021-11-12 23:31:26,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:31:26,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:26,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:31:26,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:26,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:26,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:26,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689230085] [2021-11-12 23:31:26,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689230085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:26,989 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:26,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:31:26,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970756940] [2021-11-12 23:31:26,989 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:26,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:31:26,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:31:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:31:26,990 INFO L87 Difference]: Start difference. First operand 322 states and 1094 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:28,175 INFO L93 Difference]: Finished difference Result 488 states and 1548 transitions. [2021-11-12 23:31:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:28,177 INFO L225 Difference]: With dead ends: 488 [2021-11-12 23:31:28,177 INFO L226 Difference]: Without dead ends: 488 [2021-11-12 23:31:28,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:28,177 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 964.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1102.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:28,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 461 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [5 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1102.29ms Time] [2021-11-12 23:31:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-12 23:31:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 312. [2021-11-12 23:31:28,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.372990353697749) internal successors, (1049), 311 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 1049 transitions. [2021-11-12 23:31:28,188 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 1049 transitions. Word has length 24 [2021-11-12 23:31:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:28,188 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 1049 transitions. [2021-11-12 23:31:28,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 1049 transitions. [2021-11-12 23:31:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:28,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:28,189 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:28,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (197)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:28,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:28,390 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:28,390 INFO L85 PathProgramCache]: Analyzing trace with hash -545764553, now seen corresponding path program 85 times [2021-11-12 23:31:28,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:28,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962484413] [2021-11-12 23:31:28,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:31:28,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:28,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:28,391 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:28,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (198)] Waiting until timeout for monitored process [2021-11-12 23:31:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:28,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:28,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:28,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:29,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:29,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962484413] [2021-11-12 23:31:29,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962484413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:29,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [705537928] [2021-11-12 23:31:29,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:31:29,137 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:29,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:29,138 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:29,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (199)] Waiting until timeout for monitored process [2021-11-12 23:31:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:29,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:29,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:29,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:29,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [705537928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:29,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098031800] [2021-11-12 23:31:29,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:31:29,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:29,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:31:29,833 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:31:29,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-11-12 23:31:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:29,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:29,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:30,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:30,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098031800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:30,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:31:30,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 10 [2021-11-12 23:31:30,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657392002] [2021-11-12 23:31:30,368 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:31:30,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:31:30,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:30,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:31:30,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:31:30,369 INFO L87 Difference]: Start difference. First operand 312 states and 1049 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:31,352 INFO L93 Difference]: Finished difference Result 462 states and 1463 transitions. [2021-11-12 23:31:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:31,352 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:31,353 INFO L225 Difference]: With dead ends: 462 [2021-11-12 23:31:31,353 INFO L226 Difference]: Without dead ends: 462 [2021-11-12 23:31:31,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:31:31,354 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 811.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 922.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:31,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 349 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [1 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 922.61ms Time] [2021-11-12 23:31:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-12 23:31:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 310. [2021-11-12 23:31:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.3689320388349513) internal successors, (1041), 309 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1041 transitions. [2021-11-12 23:31:31,359 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1041 transitions. Word has length 24 [2021-11-12 23:31:31,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:31,360 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1041 transitions. [2021-11-12 23:31:31,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1041 transitions. [2021-11-12 23:31:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:31,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:31,360 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:31,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-11-12 23:31:31,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (198)] Ended with exit code 0 [2021-11-12 23:31:31,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (199)] Ended with exit code 0 [2021-11-12 23:31:31,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:31,961 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:31,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1828322629, now seen corresponding path program 86 times [2021-11-12 23:31:31,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:31,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92240971] [2021-11-12 23:31:31,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:31:31,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:31,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:31,963 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:31,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (201)] Waiting until timeout for monitored process [2021-11-12 23:31:32,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:31:32,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:32,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:32,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:32,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:33,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:33,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92240971] [2021-11-12 23:31:33,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92240971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:33,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [715575361] [2021-11-12 23:31:33,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:31:33,117 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:33,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:33,119 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:33,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (202)] Waiting until timeout for monitored process [2021-11-12 23:31:33,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:31:33,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:33,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:34,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [715575361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:34,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366886812] [2021-11-12 23:31:34,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:31:34,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:34,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:31:34,109 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:31:34,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-11-12 23:31:34,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:31:34,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:34,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:31:34,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:34,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:35,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366886812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:35,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:31:35,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 15 [2021-11-12 23:31:35,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853194757] [2021-11-12 23:31:35,239 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:31:35,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:31:35,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:31:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:31:35,240 INFO L87 Difference]: Start difference. First operand 310 states and 1041 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:36,534 INFO L93 Difference]: Finished difference Result 486 states and 1537 transitions. [2021-11-12 23:31:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:36,535 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:36,536 INFO L225 Difference]: With dead ends: 486 [2021-11-12 23:31:36,536 INFO L226 Difference]: Without dead ends: 486 [2021-11-12 23:31:36,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:31:36,537 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1080.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1232.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:36,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 502 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [3 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1232.12ms Time] [2021-11-12 23:31:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-12 23:31:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 314. [2021-11-12 23:31:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.3961661341853033) internal successors, (1063), 313 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1063 transitions. [2021-11-12 23:31:36,547 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1063 transitions. Word has length 24 [2021-11-12 23:31:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:36,547 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1063 transitions. [2021-11-12 23:31:36,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1063 transitions. [2021-11-12 23:31:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:36,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:36,549 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:36,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (201)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:36,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:36,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (202)] Ended with exit code 0 [2021-11-12 23:31:37,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,203 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:37,175 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:37,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:37,176 INFO L85 PathProgramCache]: Analyzing trace with hash -973015975, now seen corresponding path program 87 times [2021-11-12 23:31:37,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:37,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865416184] [2021-11-12 23:31:37,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:31:37,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:37,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:37,177 INFO L229 MonitoredProcess]: Starting monitored process 204 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:37,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (204)] Waiting until timeout for monitored process [2021-11-12 23:31:37,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:31:37,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:37,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:37,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:38,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:38,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865416184] [2021-11-12 23:31:38,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865416184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:38,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1791981800] [2021-11-12 23:31:38,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:31:38,395 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:38,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:38,396 INFO L229 MonitoredProcess]: Starting monitored process 205 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:38,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (205)] Waiting until timeout for monitored process [2021-11-12 23:31:38,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:31:38,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:38,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:38,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:39,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:39,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1791981800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:39,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555107543] [2021-11-12 23:31:39,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:31:39,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:39,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:31:39,529 INFO L229 MonitoredProcess]: Starting monitored process 206 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:31:39,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-11-12 23:31:39,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:31:39,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:31:39,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:40,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:40,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555107543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:40,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:31:40,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-12 23:31:40,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287694591] [2021-11-12 23:31:40,644 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:31:40,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:31:40,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:40,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:31:40,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:31:40,645 INFO L87 Difference]: Start difference. First operand 314 states and 1063 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:41,820 INFO L93 Difference]: Finished difference Result 454 states and 1467 transitions. [2021-11-12 23:31:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:41,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:41,822 INFO L225 Difference]: With dead ends: 454 [2021-11-12 23:31:41,822 INFO L226 Difference]: Without dead ends: 454 [2021-11-12 23:31:41,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:31:41,822 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 974.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.03ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1105.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:41,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 594 Unknown, 0 Unchecked, 2.03ms Time], IncrementalHoareTripleChecker [4 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 1105.93ms Time] [2021-11-12 23:31:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-12 23:31:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 302. [2021-11-12 23:31:41,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.345514950166113) internal successors, (1007), 301 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1007 transitions. [2021-11-12 23:31:41,828 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1007 transitions. Word has length 24 [2021-11-12 23:31:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:41,828 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1007 transitions. [2021-11-12 23:31:41,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1007 transitions. [2021-11-12 23:31:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:41,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:41,829 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:41,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (204)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:42,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (205)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:42,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:42,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,205 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,206 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:42,430 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:42,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:42,430 INFO L85 PathProgramCache]: Analyzing trace with hash -484353819, now seen corresponding path program 88 times [2021-11-12 23:31:42,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:42,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502299386] [2021-11-12 23:31:42,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:31:42,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:42,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:42,437 INFO L229 MonitoredProcess]: Starting monitored process 207 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:42,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (207)] Waiting until timeout for monitored process [2021-11-12 23:31:42,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:31:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:42,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:42,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:42,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:43,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:43,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502299386] [2021-11-12 23:31:43,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502299386] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:43,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:31:43,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:31:43,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238815800] [2021-11-12 23:31:43,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:43,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:31:43,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:43,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:31:43,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:31:43,441 INFO L87 Difference]: Start difference. First operand 302 states and 1007 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:44,604 INFO L93 Difference]: Finished difference Result 446 states and 1399 transitions. [2021-11-12 23:31:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:44,606 INFO L225 Difference]: With dead ends: 446 [2021-11-12 23:31:44,606 INFO L226 Difference]: Without dead ends: 446 [2021-11-12 23:31:44,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:31:44,607 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 794.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 908.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:44,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 229 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 908.83ms Time] [2021-11-12 23:31:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-12 23:31:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 302. [2021-11-12 23:31:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.335548172757475) internal successors, (1004), 301 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 1004 transitions. [2021-11-12 23:31:44,612 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 1004 transitions. Word has length 24 [2021-11-12 23:31:44,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:44,612 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 1004 transitions. [2021-11-12 23:31:44,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 1004 transitions. [2021-11-12 23:31:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:44,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:44,613 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:44,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (207)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:44,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:44,814 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash 370952835, now seen corresponding path program 89 times [2021-11-12 23:31:44,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:44,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888652182] [2021-11-12 23:31:44,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 23:31:44,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:44,815 INFO L229 MonitoredProcess]: Starting monitored process 208 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:44,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (208)] Waiting until timeout for monitored process [2021-11-12 23:31:44,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-12 23:31:44,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:44,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:45,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:45,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:45,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888652182] [2021-11-12 23:31:45,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888652182] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:45,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:31:45,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:31:45,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088443501] [2021-11-12 23:31:45,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:45,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:31:45,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:45,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:31:45,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:31:45,898 INFO L87 Difference]: Start difference. First operand 302 states and 1004 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:47,020 INFO L93 Difference]: Finished difference Result 444 states and 1393 transitions. [2021-11-12 23:31:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:47,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:47,022 INFO L225 Difference]: With dead ends: 444 [2021-11-12 23:31:47,022 INFO L226 Difference]: Without dead ends: 444 [2021-11-12 23:31:47,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:31:47,023 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 747.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 851.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:47,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 234 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 851.12ms Time] [2021-11-12 23:31:47,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-12 23:31:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 298. [2021-11-12 23:31:47,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.3063973063973062) internal successors, (982), 297 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 982 transitions. [2021-11-12 23:31:47,032 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 982 transitions. Word has length 24 [2021-11-12 23:31:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:47,033 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 982 transitions. [2021-11-12 23:31:47,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 982 transitions. [2021-11-12 23:31:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 23:31:47,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:47,034 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:47,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (208)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:47,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:47,247 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash -355637161, now seen corresponding path program 90 times [2021-11-12 23:31:47,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:47,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766282450] [2021-11-12 23:31:47,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:31:47,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:47,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:47,250 INFO L229 MonitoredProcess]: Starting monitored process 209 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:47,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (209)] Waiting until timeout for monitored process [2021-11-12 23:31:47,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-12 23:31:47,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:47,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:31:47,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:47,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:48,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:48,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766282450] [2021-11-12 23:31:48,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766282450] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:48,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:31:48,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-12 23:31:48,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761478174] [2021-11-12 23:31:48,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:48,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:31:48,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:48,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:31:48,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:31:48,258 INFO L87 Difference]: Start difference. First operand 298 states and 982 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:49,119 INFO L93 Difference]: Finished difference Result 406 states and 1285 transitions. [2021-11-12 23:31:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-12 23:31:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:49,120 INFO L225 Difference]: With dead ends: 406 [2021-11-12 23:31:49,120 INFO L226 Difference]: Without dead ends: 406 [2021-11-12 23:31:49,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:49,121 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 632.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 725.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:49,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [1 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 725.13ms Time] [2021-11-12 23:31:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-12 23:31:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 286. [2021-11-12 23:31:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.3017543859649123) internal successors, (941), 285 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 941 transitions. [2021-11-12 23:31:49,127 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 941 transitions. Word has length 24 [2021-11-12 23:31:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:49,127 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 941 transitions. [2021-11-12 23:31:49,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 941 transitions. [2021-11-12 23:31:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-12 23:31:49,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:49,128 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:49,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (209)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:49,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:49,329 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:31:49,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1805174116, now seen corresponding path program 1 times [2021-11-12 23:31:49,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:49,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634838676] [2021-11-12 23:31:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:49,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:49,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:49,331 INFO L229 MonitoredProcess]: Starting monitored process 210 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:49,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (210)] Waiting until timeout for monitored process [2021-11-12 23:31:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:49,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:31:49,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:50,368 INFO L354 Elim1Store]: treesize reduction 394, result has 3.2 percent of original size [2021-11-12 23:31:50,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 496 treesize of output 176 [2021-11-12 23:31:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:31:51,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:55,875 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-11-12 23:31:55,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 241 [2021-11-12 23:32:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:32:16,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:16,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634838676] [2021-11-12 23:32:16,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634838676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:16,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1110893219] [2021-11-12 23:32:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:16,546 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:16,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:32:16,547 INFO L229 MonitoredProcess]: Starting monitored process 211 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:32:16,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (211)] Waiting until timeout for monitored process [2021-11-12 23:32:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:16,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-12 23:32:16,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:18,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:18,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:18,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:18,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:18,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:18,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:18,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:18,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:18,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:18,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:32:18,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 451 treesize of output 175 [2021-11-12 23:32:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:32:18,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:24,265 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-11-12 23:32:24,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 447 treesize of output 259 [2021-11-12 23:32:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:32:54,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1110893219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:54,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314257325] [2021-11-12 23:32:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:54,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:32:54,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:32:54,622 INFO L229 MonitoredProcess]: Starting monitored process 212 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:32:54,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-11-12 23:32:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:56,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 23:32:56,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:57,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:57,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:57,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:57,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:57,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:57,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:57,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:57,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:57,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:57,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:57,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:57,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:32:57,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 452 treesize of output 176 [2021-11-12 23:32:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:32:58,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:00,273 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-11-12 23:33:00,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 429 treesize of output 241 [2021-11-12 23:33:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:21,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314257325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:21,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:33:21,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10, 7, 8, 7] total 32 [2021-11-12 23:33:21,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955911283] [2021-11-12 23:33:21,688 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:33:21,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-12 23:33:21,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:21,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-12 23:33:21,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=911, Unknown=3, NotChecked=0, Total=1056 [2021-11-12 23:33:21,689 INFO L87 Difference]: Start difference. First operand 286 states and 941 transitions. Second operand has 33 states, 32 states have (on average 2.375) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:49,953 WARN L227 SmtUtils]: Spent 10.33s on a formula simplification. DAG size of input: 184 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:34:03,257 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:27,333 WARN L227 SmtUtils]: Spent 10.45s on a formula simplification. DAG size of input: 206 DAG size of output: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:34:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:43,124 INFO L93 Difference]: Finished difference Result 1115 states and 3057 transitions. [2021-11-12 23:34:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-12 23:34:43,126 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.375) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-12 23:34:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:43,128 INFO L225 Difference]: With dead ends: 1115 [2021-11-12 23:34:43,128 INFO L226 Difference]: Without dead ends: 1054 [2021-11-12 23:34:43,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 171 SyntacticMatches, 13 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3111 ImplicationChecksByTransitivity, 76.5s TimeCoverageRelationStatistics Valid=1868, Invalid=8029, Unknown=3, NotChecked=0, Total=9900 [2021-11-12 23:34:43,129 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 641 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 106 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15149.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.73ms SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 16397.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:43,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 0 Invalid, 3806 Unknown, 0 Unchecked, 20.73ms Time], IncrementalHoareTripleChecker [106 Valid, 2849 Invalid, 1 Unknown, 850 Unchecked, 16397.35ms Time] [2021-11-12 23:34:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-11-12 23:34:43,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 367. [2021-11-12 23:34:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.3169398907103824) internal successors, (1214), 366 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:34:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1214 transitions. [2021-11-12 23:34:43,140 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1214 transitions. Word has length 25 [2021-11-12 23:34:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:43,141 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1214 transitions. [2021-11-12 23:34:43,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.375) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:34:43,141 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1214 transitions. [2021-11-12 23:34:43,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-12 23:34:43,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:43,142 INFO L514 BasicCegarLoop]: trace histogram [3, 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 23:34:43,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2021-11-12 23:34:43,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (210)] Ended with exit code 0 [2021-11-12 23:34:43,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (211)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:43,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,210 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,211 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:34:43,742 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-12 23:34:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:43,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1754319660, now seen corresponding path program 2 times [2021-11-12 23:34:43,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:43,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231904284] [2021-11-12 23:34:43,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:34:43,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:43,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:43,745 INFO L229 MonitoredProcess]: Starting monitored process 213 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:43,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bec362-c86c-4f3e-ba45-5163264694f7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (213)] Waiting until timeout for monitored process [2021-11-12 23:34:43,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:34:43,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:34:43,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:34:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:48,259 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-12 23:34:48,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 284 treesize of output 130 [2021-11-12 23:34:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:34:48,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:59,873 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-11-12 23:34:59,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1041 treesize of output 529