./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/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 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:52:26,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:52:26,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:52:26,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:52:26,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:52:26,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:52:26,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:52:26,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:52:26,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:52:26,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:52:26,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:52:26,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:52:26,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:52:26,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:52:26,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:52:26,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:52:26,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:52:26,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:52:26,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:52:26,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:52:26,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:52:26,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:52:26,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:52:26,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:52:26,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:52:26,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:52:26,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:52:26,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:52:26,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:52:26,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:52:26,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:52:26,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:52:26,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:52:26,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:52:26,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:52:26,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:52:26,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:52:26,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:52:26,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:52:26,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:52:26,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:52:26,498 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:52:26,542 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:52:26,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:52:26,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:52:26,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:52:26,544 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:52:26,544 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:52:26,545 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:52:26,545 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:52:26,551 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:52:26,552 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:52:26,553 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:52:26,553 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:52:26,553 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:52:26,554 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:52:26,554 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:52:26,554 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:52:26,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:52:26,556 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:52:26,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:52:26,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:52:26,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:52:26,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:52:26,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:52:26,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:52:26,557 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:52:26,558 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:52:26,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:52:26,558 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:52:26,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:52:26,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:52:26,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:52:26,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:26,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:52:26,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:52:26,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:52:26,562 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:52:26,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:52:26,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:52:26,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:52:26,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:52:26,563 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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 [2021-11-12 22:52:26,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:52:26,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:52:26,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:52:26,932 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:52:26,932 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:52:26,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-12 22:52:27,016 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/data/c29f696ae/dd6cc04fa80a46bfbc327a6e7af7ee21/FLAG4d21b2c04 [2021-11-12 22:52:27,639 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:52:27,645 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-12 22:52:27,676 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/data/c29f696ae/dd6cc04fa80a46bfbc327a6e7af7ee21/FLAG4d21b2c04 [2021-11-12 22:52:27,857 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/data/c29f696ae/dd6cc04fa80a46bfbc327a6e7af7ee21 [2021-11-12 22:52:27,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:52:27,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:52:27,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:27,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:52:27,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:52:27,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68ff0314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27, skipping insertion in model container [2021-11-12 22:52:27,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:52:27,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:52:28,542 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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-12 22:52:28,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:28,644 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 22:52:28,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@23a86ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:28, skipping insertion in model container [2021-11-12 22:52:28,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:28,645 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:52:28,648 INFO L158 Benchmark]: Toolchain (without parser) took 785.35ms. Allocated memory was 81.8MB in the beginning and 109.1MB in the end (delta: 27.3MB). Free memory was 44.8MB in the beginning and 70.0MB in the end (delta: -25.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:52:28,649 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 81.8MB. Free memory was 54.0MB in the beginning and 54.0MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:52:28,651 INFO L158 Benchmark]: CACSL2BoogieTranslator took 782.55ms. Allocated memory was 81.8MB in the beginning and 109.1MB in the end (delta: 27.3MB). Free memory was 44.6MB in the beginning and 70.0MB in the end (delta: -25.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:52:28,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 81.8MB. Free memory was 54.0MB in the beginning and 54.0MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 782.55ms. Allocated memory was 81.8MB in the beginning and 109.1MB in the end (delta: 27.3MB). Free memory was 44.6MB in the beginning and 70.0MB in the end (delta: -25.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 115]: 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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/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 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:52:30,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:52:30,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:52:30,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:52:30,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:52:31,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:52:31,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:52:31,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:52:31,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:52:31,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:52:31,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:52:31,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:52:31,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:52:31,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:52:31,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:52:31,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:52:31,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:52:31,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:52:31,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:52:31,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:52:31,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:52:31,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:52:31,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:52:31,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:52:31,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:52:31,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:52:31,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:52:31,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:52:31,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:52:31,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:52:31,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:52:31,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:52:31,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:52:31,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:52:31,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:52:31,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:52:31,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:52:31,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:52:31,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:52:31,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:52:31,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:52:31,074 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:52:31,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:52:31,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:52:31,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:52:31,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:52:31,120 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:52:31,120 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:52:31,121 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:52:31,121 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:52:31,121 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:52:31,121 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:52:31,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:52:31,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:52:31,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:52:31,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:52:31,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:52:31,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:52:31,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:52:31,125 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:52:31,125 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:52:31,125 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:52:31,125 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:52:31,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:52:31,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:52:31,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:52:31,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:52:31,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:52:31,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:52:31,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:31,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:52:31,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:52:31,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:52:31,127 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:52:31,128 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:31,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:52:31,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:52:31,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:52:31,129 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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 [2021-11-12 22:52:31,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:52:31,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:52:31,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:52:31,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:52:31,513 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:52:31,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-12 22:52:31,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/data/586eaaf18/6334b75d2caf466f9ccfb4ac951ddf69/FLAGd710860f2 [2021-11-12 22:52:32,432 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:52:32,433 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-12 22:52:32,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/data/586eaaf18/6334b75d2caf466f9ccfb4ac951ddf69/FLAGd710860f2 [2021-11-12 22:52:32,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/data/586eaaf18/6334b75d2caf466f9ccfb4ac951ddf69 [2021-11-12 22:52:32,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:52:32,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:52:32,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:32,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:52:32,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:52:32,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:32" (1/1) ... [2021-11-12 22:52:32,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a54873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:32, skipping insertion in model container [2021-11-12 22:52:32,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:32" (1/1) ... [2021-11-12 22:52:32,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:52:32,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:52:33,087 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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-12 22:52:33,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:33,181 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:52:33,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:52:33,300 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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-12 22:52:33,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:33,328 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:52:33,391 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_5800970c-2e99-41b9-b9a4-12437f1fe9b1/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-12 22:52:33,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:33,455 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:52:33,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33 WrapperNode [2021-11-12 22:52:33,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:33,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:52:33,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:52:33,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:52:33,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:52:33,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:52:33,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:52:33,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:52:33,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:52:33,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:52:33,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:52:33,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:52:33,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (1/1) ... [2021-11-12 22:52:33,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:33,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:52:33,753 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:52:33,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:52:33,805 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 22:52:33,805 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 22:52:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:52:33,806 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:52:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:52:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:52:33,806 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:52:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:52:33,806 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:52:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:52:33,807 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:52:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:52:33,807 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:52:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:52:33,807 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:52:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:52:33,807 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:52:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 22:52:33,808 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 22:52:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:52:33,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:52:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:52:33,808 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:52:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:52:33,808 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:52:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:52:33,808 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:52:33,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:52:33,809 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:52:33,809 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:52:33,809 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:52:33,809 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:52:33,809 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:52:33,809 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:52:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:52:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:52:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:52:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:52:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:52:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:52:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-12 22:52:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-12 22:52:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:52:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:52:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:52:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:52:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:52:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:52:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:52:33,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:52:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:52:33,812 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:52:37,623 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:52:37,623 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:52:37,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:37 BoogieIcfgContainer [2021-11-12 22:52:37,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:52:37,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:52:37,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:52:37,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:52:37,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:52:32" (1/3) ... [2021-11-12 22:52:37,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b1e0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:37, skipping insertion in model container [2021-11-12 22:52:37,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:33" (2/3) ... [2021-11-12 22:52:37,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b1e0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:37, skipping insertion in model container [2021-11-12 22:52:37,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:37" (3/3) ... [2021-11-12 22:52:37,636 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product03.cil.c [2021-11-12 22:52:37,642 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:52:37,642 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:52:37,717 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:52:37,729 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 22:52:37,729 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:52:37,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 552 states, 429 states have (on average 1.68997668997669) internal successors, (725), 450 states have internal predecessors, (725), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 22:52:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 22:52:37,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:37,806 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:37,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:37,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1206513483, now seen corresponding path program 1 times [2021-11-12 22:52:37,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:37,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81041109] [2021-11-12 22:52:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:37,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:37,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:37,828 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:37,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:52:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:52:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:52:38,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:52:39,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:39,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81041109] [2021-11-12 22:52:39,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81041109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:39,122 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:39,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:52:39,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228329117] [2021-11-12 22:52:39,125 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:39,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:52:39,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:39,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:52:39,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:52:39,173 INFO L87 Difference]: Start difference. First operand has 552 states, 429 states have (on average 1.68997668997669) internal successors, (725), 450 states have internal predecessors, (725), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-12 22:52:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:39,244 INFO L93 Difference]: Finished difference Result 573 states and 949 transitions. [2021-11-12 22:52:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:52:39,246 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 125 [2021-11-12 22:52:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:39,273 INFO L225 Difference]: With dead ends: 573 [2021-11-12 22:52:39,273 INFO L226 Difference]: Without dead ends: 544 [2021-11-12 22:52:39,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:52:39,281 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:39,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 7.52ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:52:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-12 22:52:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-12 22:52:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 423 states have (on average 1.6879432624113475) internal successors, (714), 442 states have internal predecessors, (714), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:52:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 903 transitions. [2021-11-12 22:52:39,418 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 903 transitions. Word has length 125 [2021-11-12 22:52:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:39,422 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 903 transitions. [2021-11-12 22:52:39,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-12 22:52:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 903 transitions. [2021-11-12 22:52:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:52:39,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:39,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:39,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:39,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:39,663 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash -423290177, now seen corresponding path program 1 times [2021-11-12 22:52:39,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:39,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006320380] [2021-11-12 22:52:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:39,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:39,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:39,668 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:39,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:52:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:40,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:40,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:52:40,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:52:41,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:41,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006320380] [2021-11-12 22:52:41,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006320380] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:41,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:41,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:52:41,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982187747] [2021-11-12 22:52:41,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:41,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:41,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:41,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:41,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:41,148 INFO L87 Difference]: Start difference. First operand 544 states and 903 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:41,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:41,286 INFO L93 Difference]: Finished difference Result 1079 states and 1798 transitions. [2021-11-12 22:52:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:41,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 127 [2021-11-12 22:52:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:41,295 INFO L225 Difference]: With dead ends: 1079 [2021-11-12 22:52:41,295 INFO L226 Difference]: Without dead ends: 544 [2021-11-12 22:52:41,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:41,304 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 14 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.15ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:41,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2660 Invalid, 35 Unknown, 0 Unchecked, 16.15ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 40.98ms Time] [2021-11-12 22:52:41,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-12 22:52:41,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-12 22:52:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 423 states have (on average 1.6855791962174942) internal successors, (713), 442 states have internal predecessors, (713), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:52:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2021-11-12 22:52:41,373 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 127 [2021-11-12 22:52:41,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:41,374 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2021-11-12 22:52:41,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:41,375 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2021-11-12 22:52:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 22:52:41,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:41,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:41,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:41,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:41,601 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:41,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:41,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1248287939, now seen corresponding path program 1 times [2021-11-12 22:52:41,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:41,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809964283] [2021-11-12 22:52:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:41,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:41,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:41,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:41,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:52:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:42,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:42,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:52:42,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:52:42,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:42,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809964283] [2021-11-12 22:52:42,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809964283] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:42,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:42,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:52:42,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712737505] [2021-11-12 22:52:42,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:42,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:42,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:42,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:42,861 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:42,988 INFO L93 Difference]: Finished difference Result 1079 states and 1796 transitions. [2021-11-12 22:52:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:42,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2021-11-12 22:52:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:42,996 INFO L225 Difference]: With dead ends: 1079 [2021-11-12 22:52:42,996 INFO L226 Difference]: Without dead ends: 544 [2021-11-12 22:52:43,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:43,004 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 12 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.52ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:43,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2660 Invalid, 33 Unknown, 0 Unchecked, 17.52ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 35.30ms Time] [2021-11-12 22:52:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-12 22:52:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-12 22:52:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 423 states have (on average 1.6832151300236406) internal successors, (712), 442 states have internal predecessors, (712), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:52:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 901 transitions. [2021-11-12 22:52:43,054 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 901 transitions. Word has length 129 [2021-11-12 22:52:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:43,054 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 901 transitions. [2021-11-12 22:52:43,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 901 transitions. [2021-11-12 22:52:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:52:43,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:43,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:43,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:43,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:43,282 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:43,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1104012479, now seen corresponding path program 1 times [2021-11-12 22:52:43,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:43,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793887202] [2021-11-12 22:52:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:43,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:43,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:43,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:43,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:52:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:43,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:43,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:52:44,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:52:44,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:44,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793887202] [2021-11-12 22:52:44,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793887202] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:44,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:44,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:52:44,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938382295] [2021-11-12 22:52:44,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:44,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:44,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:44,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:44,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:44,516 INFO L87 Difference]: Start difference. First operand 544 states and 901 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:44,606 INFO L93 Difference]: Finished difference Result 1083 states and 1799 transitions. [2021-11-12 22:52:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:52:44,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2021-11-12 22:52:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:44,612 INFO L225 Difference]: With dead ends: 1083 [2021-11-12 22:52:44,612 INFO L226 Difference]: Without dead ends: 550 [2021-11-12 22:52:44,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:44,617 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 13 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.83ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:44,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2660 Invalid, 35 Unknown, 0 Unchecked, 7.83ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 37.66ms Time] [2021-11-12 22:52:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-12 22:52:44,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-12 22:52:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 428 states have (on average 1.675233644859813) internal successors, (717), 447 states have internal predecessors, (717), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:52:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 906 transitions. [2021-11-12 22:52:44,647 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 906 transitions. Word has length 131 [2021-11-12 22:52:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:44,648 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 906 transitions. [2021-11-12 22:52:44,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 906 transitions. [2021-11-12 22:52:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 22:52:44,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:44,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:44,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:44,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:44,874 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:44,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:44,875 INFO L85 PathProgramCache]: Analyzing trace with hash 98235219, now seen corresponding path program 1 times [2021-11-12 22:52:44,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:44,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375370702] [2021-11-12 22:52:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:44,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:44,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:44,877 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:44,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:52:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:45,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:52:45,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:52:46,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:46,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375370702] [2021-11-12 22:52:46,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375370702] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:46,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:46,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:52:46,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216028601] [2021-11-12 22:52:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:46,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:46,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:46,093 INFO L87 Difference]: Start difference. First operand 550 states and 906 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:46,172 INFO L93 Difference]: Finished difference Result 1082 states and 1790 transitions. [2021-11-12 22:52:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2021-11-12 22:52:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:46,178 INFO L225 Difference]: With dead ends: 1082 [2021-11-12 22:52:46,179 INFO L226 Difference]: Without dead ends: 550 [2021-11-12 22:52:46,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:46,184 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 8 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:46,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2661 Invalid, 30 Unknown, 0 Unchecked, 6.93ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 32.22ms Time] [2021-11-12 22:52:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-12 22:52:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-12 22:52:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 428 states have (on average 1.6728971962616823) internal successors, (716), 447 states have internal predecessors, (716), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:52:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 905 transitions. [2021-11-12 22:52:46,213 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 905 transitions. Word has length 132 [2021-11-12 22:52:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:46,214 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 905 transitions. [2021-11-12 22:52:46,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 905 transitions. [2021-11-12 22:52:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 22:52:46,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:46,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:46,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:46,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:46,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash -165126845, now seen corresponding path program 1 times [2021-11-12 22:52:46,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:46,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750036591] [2021-11-12 22:52:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:46,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:46,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:46,436 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:46,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:52:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:47,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:52:47,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:52:47,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:47,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750036591] [2021-11-12 22:52:47,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750036591] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:47,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:47,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:52:47,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665669627] [2021-11-12 22:52:47,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:47,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:47,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:47,628 INFO L87 Difference]: Start difference. First operand 550 states and 905 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:47,708 INFO L93 Difference]: Finished difference Result 1082 states and 1789 transitions. [2021-11-12 22:52:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:47,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2021-11-12 22:52:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:47,714 INFO L225 Difference]: With dead ends: 1082 [2021-11-12 22:52:47,714 INFO L226 Difference]: Without dead ends: 550 [2021-11-12 22:52:47,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:47,719 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 6 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:47,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2661 Invalid, 28 Unknown, 0 Unchecked, 6.44ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 30.05ms Time] [2021-11-12 22:52:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-12 22:52:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-12 22:52:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 428 states have (on average 1.6705607476635513) internal successors, (715), 447 states have internal predecessors, (715), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:52:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 904 transitions. [2021-11-12 22:52:47,746 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 904 transitions. Word has length 133 [2021-11-12 22:52:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:47,747 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 904 transitions. [2021-11-12 22:52:47,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 904 transitions. [2021-11-12 22:52:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 22:52:47,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:47,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:47,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:47,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:47,970 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:47,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1111545687, now seen corresponding path program 1 times [2021-11-12 22:52:47,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:47,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977347358] [2021-11-12 22:52:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:47,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:47,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:47,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:48,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:52:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:48,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:52:48,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:48,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:52:49,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:49,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977347358] [2021-11-12 22:52:49,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977347358] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:49,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:49,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 22:52:49,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985624204] [2021-11-12 22:52:49,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:49,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:52:49,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:49,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:52:49,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:52:49,400 INFO L87 Difference]: Start difference. First operand 550 states and 904 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:52:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:49,649 INFO L93 Difference]: Finished difference Result 1099 states and 1817 transitions. [2021-11-12 22:52:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:52:49,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2021-11-12 22:52:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:49,656 INFO L225 Difference]: With dead ends: 1099 [2021-11-12 22:52:49,656 INFO L226 Difference]: Without dead ends: 571 [2021-11-12 22:52:49,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:49,660 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 148 mSDsluCounter, 4333 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5221 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:49,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5221 Invalid, 85 Unknown, 0 Unchecked, 11.76ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 156.15ms Time] [2021-11-12 22:52:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-12 22:52:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 569. [2021-11-12 22:52:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 444 states have (on average 1.6689189189189189) internal successors, (741), 465 states have internal predecessors, (741), 98 states have call successors, (98), 25 states have call predecessors, (98), 26 states have return successors, (96), 91 states have call predecessors, (96), 93 states have call successors, (96) [2021-11-12 22:52:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 935 transitions. [2021-11-12 22:52:49,688 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 935 transitions. Word has length 134 [2021-11-12 22:52:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:49,689 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 935 transitions. [2021-11-12 22:52:49,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:52:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 935 transitions. [2021-11-12 22:52:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 22:52:49,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:49,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:49,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:49,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:49,914 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:49,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1896939304, now seen corresponding path program 1 times [2021-11-12 22:52:49,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:49,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101452147] [2021-11-12 22:52:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:49,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:49,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:49,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:49,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:52:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:50,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:50,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:52:50,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:52:51,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:51,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101452147] [2021-11-12 22:52:51,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101452147] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:51,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:51,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 22:52:51,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321854442] [2021-11-12 22:52:51,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:51,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:51,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:51,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:51,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:51,120 INFO L87 Difference]: Start difference. First operand 569 states and 935 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:51,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:51,238 INFO L93 Difference]: Finished difference Result 1112 states and 1839 transitions. [2021-11-12 22:52:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:52:51,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2021-11-12 22:52:51,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:51,246 INFO L225 Difference]: With dead ends: 1112 [2021-11-12 22:52:51,246 INFO L226 Difference]: Without dead ends: 565 [2021-11-12 22:52:51,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:51,250 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 8 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.48ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:51,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2660 Invalid, 30 Unknown, 0 Unchecked, 6.48ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 72.16ms Time] [2021-11-12 22:52:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-12 22:52:51,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-12 22:52:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 442 states have (on average 1.669683257918552) internal successors, (738), 462 states have internal predecessors, (738), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-12 22:52:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 928 transitions. [2021-11-12 22:52:51,279 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 928 transitions. Word has length 134 [2021-11-12 22:52:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:51,279 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 928 transitions. [2021-11-12 22:52:51,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:51,280 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 928 transitions. [2021-11-12 22:52:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 22:52:51,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:51,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:51,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:51,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:51,501 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1455686114, now seen corresponding path program 1 times [2021-11-12 22:52:51,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:51,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466525807] [2021-11-12 22:52:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:51,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:51,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:51,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:51,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:52:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:52,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:52,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:52:52,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:52,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466525807] [2021-11-12 22:52:52,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466525807] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:52,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:52,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:52:52,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179002203] [2021-11-12 22:52:52,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:52,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:52,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:52,653 INFO L87 Difference]: Start difference. First operand 565 states and 928 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:52,889 INFO L93 Difference]: Finished difference Result 1138 states and 1884 transitions. [2021-11-12 22:52:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:52,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 135 [2021-11-12 22:52:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:52,897 INFO L225 Difference]: With dead ends: 1138 [2021-11-12 22:52:52,897 INFO L226 Difference]: Without dead ends: 565 [2021-11-12 22:52:52,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:52,903 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 134 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2468 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.85ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 184.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:52,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2468 Invalid, 131 Unknown, 0 Unchecked, 6.85ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 184.28ms Time] [2021-11-12 22:52:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-12 22:52:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-12 22:52:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 442 states have (on average 1.658371040723982) internal successors, (733), 462 states have internal predecessors, (733), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-12 22:52:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 923 transitions. [2021-11-12 22:52:52,933 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 923 transitions. Word has length 135 [2021-11-12 22:52:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:52,934 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 923 transitions. [2021-11-12 22:52:52,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 923 transitions. [2021-11-12 22:52:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 22:52:52,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:52,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:52,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:53,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:53,153 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:53,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1566162568, now seen corresponding path program 1 times [2021-11-12 22:52:53,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:53,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837798436] [2021-11-12 22:52:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:53,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:53,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:53,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:53,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:52:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:53,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:53,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:53,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:52:54,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:54,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837798436] [2021-11-12 22:52:54,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837798436] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:54,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:54,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:52:54,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333012374] [2021-11-12 22:52:54,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:54,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:54,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:54,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:54,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:54,284 INFO L87 Difference]: Start difference. First operand 565 states and 923 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:54,486 INFO L93 Difference]: Finished difference Result 1138 states and 1874 transitions. [2021-11-12 22:52:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:54,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2021-11-12 22:52:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:54,493 INFO L225 Difference]: With dead ends: 1138 [2021-11-12 22:52:54,493 INFO L226 Difference]: Without dead ends: 565 [2021-11-12 22:52:54,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:54,497 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 128 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2468 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.86ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:54,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2468 Invalid, 121 Unknown, 0 Unchecked, 5.86ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 157.66ms Time] [2021-11-12 22:52:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-12 22:52:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-12 22:52:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 442 states have (on average 1.6470588235294117) internal successors, (728), 462 states have internal predecessors, (728), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-12 22:52:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 918 transitions. [2021-11-12 22:52:54,523 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 918 transitions. Word has length 137 [2021-11-12 22:52:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:54,524 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 918 transitions. [2021-11-12 22:52:54,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 918 transitions. [2021-11-12 22:52:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 22:52:54,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:54,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:54,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:54,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:54,745 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:54,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1163120766, now seen corresponding path program 1 times [2021-11-12 22:52:54,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:54,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90278252] [2021-11-12 22:52:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:54,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:54,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:54,748 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:54,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:52:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:55,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:55,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:55,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:52:55,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:55,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90278252] [2021-11-12 22:52:55,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90278252] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:55,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:55,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:52:55,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363150038] [2021-11-12 22:52:55,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:55,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:55,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:55,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:55,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:55,991 INFO L87 Difference]: Start difference. First operand 565 states and 918 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:56,215 INFO L93 Difference]: Finished difference Result 1159 states and 1895 transitions. [2021-11-12 22:52:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:52:56,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 139 [2021-11-12 22:52:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:56,222 INFO L225 Difference]: With dead ends: 1159 [2021-11-12 22:52:56,222 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 22:52:56,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:56,226 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 143 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.25ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:56,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2478 Invalid, 131 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 165.25ms Time] [2021-11-12 22:52:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 22:52:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 580. [2021-11-12 22:52:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 457 states have (on average 1.62582056892779) internal successors, (743), 476 states have internal predecessors, (743), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:52:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 932 transitions. [2021-11-12 22:52:56,250 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 932 transitions. Word has length 139 [2021-11-12 22:52:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:56,252 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 932 transitions. [2021-11-12 22:52:56,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:56,252 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 932 transitions. [2021-11-12 22:52:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 22:52:56,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:56,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:56,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:56,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:56,471 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:56,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1196342274, now seen corresponding path program 1 times [2021-11-12 22:52:56,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:56,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219734890] [2021-11-12 22:52:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:56,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:56,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:56,474 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:56,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:52:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:52:57,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:57,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:52:57,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:57,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219734890] [2021-11-12 22:52:57,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219734890] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:57,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:57,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 22:52:57,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495106667] [2021-11-12 22:52:57,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:57,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:52:57,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:52:57,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:52:57,765 INFO L87 Difference]: Start difference. First operand 580 states and 932 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:52:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:57,919 INFO L93 Difference]: Finished difference Result 1123 states and 1816 transitions. [2021-11-12 22:52:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:52:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 139 [2021-11-12 22:52:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:57,926 INFO L225 Difference]: With dead ends: 1123 [2021-11-12 22:52:57,926 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 22:52:57,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:52:57,958 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 131 mSDsluCounter, 4298 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:57,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5189 Invalid, 75 Unknown, 0 Unchecked, 6.90ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 110.84ms Time] [2021-11-12 22:52:57,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 22:52:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 559. [2021-11-12 22:52:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 436 states have (on average 1.6192660550458715) internal successors, (706), 455 states have internal predecessors, (706), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:52:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 895 transitions. [2021-11-12 22:52:57,986 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 895 transitions. Word has length 139 [2021-11-12 22:52:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:57,987 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 895 transitions. [2021-11-12 22:52:57,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:52:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 895 transitions. [2021-11-12 22:52:57,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 22:52:57,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:57,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:58,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:58,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:58,216 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash -236171404, now seen corresponding path program 1 times [2021-11-12 22:52:58,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:58,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88023472] [2021-11-12 22:52:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:58,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:58,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:58,218 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:58,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:52:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:58,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:58,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:59,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:52:59,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:59,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88023472] [2021-11-12 22:52:59,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88023472] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:59,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:59,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:52:59,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915804706] [2021-11-12 22:52:59,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:59,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:59,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:59,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:59,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:59,402 INFO L87 Difference]: Start difference. First operand 559 states and 895 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:59,526 INFO L93 Difference]: Finished difference Result 1087 states and 1754 transitions. [2021-11-12 22:52:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:59,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2021-11-12 22:52:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:59,533 INFO L225 Difference]: With dead ends: 1087 [2021-11-12 22:52:59,533 INFO L226 Difference]: Without dead ends: 559 [2021-11-12 22:52:59,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:52:59,537 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 69 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.69ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:59,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2492 Invalid, 54 Unknown, 0 Unchecked, 3.69ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 93.80ms Time] [2021-11-12 22:52:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-12 22:52:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-12 22:52:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 436 states have (on average 1.6169724770642202) internal successors, (705), 455 states have internal predecessors, (705), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:52:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 894 transitions. [2021-11-12 22:52:59,560 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 894 transitions. Word has length 140 [2021-11-12 22:52:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:59,561 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 894 transitions. [2021-11-12 22:52:59,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:52:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 894 transitions. [2021-11-12 22:52:59,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 22:52:59,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:59,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:59,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:59,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:59,781 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:59,781 INFO L85 PathProgramCache]: Analyzing trace with hash 513835161, now seen corresponding path program 1 times [2021-11-12 22:52:59,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:59,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618954043] [2021-11-12 22:52:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:59,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:59,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:59,784 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:59,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:53:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:00,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:00,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:00,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:53:01,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:01,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618954043] [2021-11-12 22:53:01,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618954043] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:01,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:01,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:53:01,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156351678] [2021-11-12 22:53:01,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:01,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:53:01,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:01,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:53:01,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:53:01,039 INFO L87 Difference]: Start difference. First operand 559 states and 894 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:53:01,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:01,149 INFO L93 Difference]: Finished difference Result 1087 states and 1753 transitions. [2021-11-12 22:53:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:01,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2021-11-12 22:53:01,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:01,156 INFO L225 Difference]: With dead ends: 1087 [2021-11-12 22:53:01,157 INFO L226 Difference]: Without dead ends: 559 [2021-11-12 22:53:01,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:53:01,161 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 67 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:01,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2492 Invalid, 52 Unknown, 0 Unchecked, 3.56ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 79.63ms Time] [2021-11-12 22:53:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-12 22:53:01,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-12 22:53:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 436 states have (on average 1.614678899082569) internal successors, (704), 455 states have internal predecessors, (704), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:53:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 893 transitions. [2021-11-12 22:53:01,186 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 893 transitions. Word has length 141 [2021-11-12 22:53:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:01,186 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 893 transitions. [2021-11-12 22:53:01,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:53:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 893 transitions. [2021-11-12 22:53:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 22:53:01,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:01,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:01,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:01,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:01,410 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:01,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:01,411 INFO L85 PathProgramCache]: Analyzing trace with hash -827374225, now seen corresponding path program 1 times [2021-11-12 22:53:01,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:01,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023688268] [2021-11-12 22:53:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:01,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:01,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:01,412 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:01,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:53:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:01,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:53:01,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:02,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:02,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:02,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023688268] [2021-11-12 22:53:02,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023688268] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:02,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:02,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:53:02,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825881586] [2021-11-12 22:53:02,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:02,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:53:02,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:02,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:53:02,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:02,853 INFO L87 Difference]: Start difference. First operand 559 states and 893 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:53:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:03,096 INFO L93 Difference]: Finished difference Result 1092 states and 1760 transitions. [2021-11-12 22:53:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:53:03,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 142 [2021-11-12 22:53:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:03,103 INFO L225 Difference]: With dead ends: 1092 [2021-11-12 22:53:03,104 INFO L226 Difference]: Without dead ends: 570 [2021-11-12 22:53:03,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:53:03,108 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 109 mSDsluCounter, 4946 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 153.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5781 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.83ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:03,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5781 Invalid, 152 Unknown, 0 Unchecked, 6.83ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 171.45ms Time] [2021-11-12 22:53:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-12 22:53:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 561. [2021-11-12 22:53:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 438 states have (on average 1.6095890410958904) internal successors, (705), 457 states have internal predecessors, (705), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:53:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 894 transitions. [2021-11-12 22:53:03,131 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 894 transitions. Word has length 142 [2021-11-12 22:53:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:03,131 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 894 transitions. [2021-11-12 22:53:03,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:53:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 894 transitions. [2021-11-12 22:53:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 22:53:03,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:03,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:03,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:03,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:03,353 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:03,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1441483236, now seen corresponding path program 1 times [2021-11-12 22:53:03,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:03,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403660445] [2021-11-12 22:53:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:03,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:03,356 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:03,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:53:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:03,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:53:03,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:04,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:04,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:04,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403660445] [2021-11-12 22:53:04,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403660445] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:04,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:04,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:53:04,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125632425] [2021-11-12 22:53:04,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:04,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:53:04,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:04,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:53:04,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:04,740 INFO L87 Difference]: Start difference. First operand 561 states and 894 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:53:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:04,991 INFO L93 Difference]: Finished difference Result 1084 states and 1741 transitions. [2021-11-12 22:53:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:53:04,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 143 [2021-11-12 22:53:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:04,998 INFO L225 Difference]: With dead ends: 1084 [2021-11-12 22:53:04,998 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 22:53:05,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:53:05,002 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 77 mSDsluCounter, 4952 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5789 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.98ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:05,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5789 Invalid, 152 Unknown, 0 Unchecked, 6.98ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 182.21ms Time] [2021-11-12 22:53:05,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 22:53:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 563. [2021-11-12 22:53:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 440 states have (on average 1.6045454545454545) internal successors, (706), 459 states have internal predecessors, (706), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:53:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 895 transitions. [2021-11-12 22:53:05,029 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 895 transitions. Word has length 143 [2021-11-12 22:53:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:05,030 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 895 transitions. [2021-11-12 22:53:05,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:53:05,030 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 895 transitions. [2021-11-12 22:53:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 22:53:05,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:05,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:05,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:05,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:05,249 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1630872409, now seen corresponding path program 1 times [2021-11-12 22:53:05,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:05,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222974694] [2021-11-12 22:53:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:05,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:05,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:05,251 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:05,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:53:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:05,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:53:05,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:06,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:06,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:06,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222974694] [2021-11-12 22:53:06,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222974694] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:06,451 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:06,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:53:06,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462440252] [2021-11-12 22:53:06,452 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:06,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:53:06,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:53:06,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:53:06,455 INFO L87 Difference]: Start difference. First operand 563 states and 895 transitions. Second operand has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:06,639 INFO L93 Difference]: Finished difference Result 1030 states and 1668 transitions. [2021-11-12 22:53:06,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:53:06,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 144 [2021-11-12 22:53:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:06,645 INFO L225 Difference]: With dead ends: 1030 [2021-11-12 22:53:06,645 INFO L226 Difference]: Without dead ends: 556 [2021-11-12 22:53:06,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:06,649 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 110 mSDsluCounter, 3380 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 4229 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.66ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.19ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:06,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 4229 Invalid, 78 Unknown, 0 Unchecked, 5.66ms Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 103.19ms Time] [2021-11-12 22:53:06,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-12 22:53:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2021-11-12 22:53:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 433 states have (on average 1.6120092378752886) internal successors, (698), 452 states have internal predecessors, (698), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:53:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 887 transitions. [2021-11-12 22:53:06,671 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 887 transitions. Word has length 144 [2021-11-12 22:53:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:06,672 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 887 transitions. [2021-11-12 22:53:06,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 887 transitions. [2021-11-12 22:53:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:53:06,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:06,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:06,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:06,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:06,899 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:06,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:06,899 INFO L85 PathProgramCache]: Analyzing trace with hash 25659822, now seen corresponding path program 1 times [2021-11-12 22:53:06,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:06,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314767927] [2021-11-12 22:53:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:06,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:06,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:06,901 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:06,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:53:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:07,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:53:07,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:07,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:07,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:07,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314767927] [2021-11-12 22:53:07,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314767927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:07,980 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:07,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:53:07,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289554183] [2021-11-12 22:53:07,980 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:07,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:53:07,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:53:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:53:07,985 INFO L87 Difference]: Start difference. First operand 556 states and 887 transitions. Second operand has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:08,135 INFO L93 Difference]: Finished difference Result 1035 states and 1682 transitions. [2021-11-12 22:53:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:53:08,137 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 145 [2021-11-12 22:53:08,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:08,142 INFO L225 Difference]: With dead ends: 1035 [2021-11-12 22:53:08,142 INFO L226 Difference]: Without dead ends: 553 [2021-11-12 22:53:08,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:08,146 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 170 mSDsluCounter, 5027 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 5868 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.06ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:08,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 5868 Invalid, 92 Unknown, 0 Unchecked, 7.06ms Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 106.05ms Time] [2021-11-12 22:53:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-12 22:53:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-12 22:53:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 430 states have (on average 1.6116279069767443) internal successors, (693), 449 states have internal predecessors, (693), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:53:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 882 transitions. [2021-11-12 22:53:08,169 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 882 transitions. Word has length 145 [2021-11-12 22:53:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:08,170 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 882 transitions. [2021-11-12 22:53:08,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 882 transitions. [2021-11-12 22:53:08,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:53:08,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:08,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:08,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:08,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:08,397 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1020995118, now seen corresponding path program 1 times [2021-11-12 22:53:08,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:08,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128631124] [2021-11-12 22:53:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:08,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:08,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:08,398 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:08,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:53:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:08,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:53:08,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:09,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:09,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:09,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128631124] [2021-11-12 22:53:09,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128631124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:09,524 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:09,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:53:09,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654711331] [2021-11-12 22:53:09,525 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:09,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:53:09,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:53:09,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:53:09,526 INFO L87 Difference]: Start difference. First operand 553 states and 882 transitions. Second operand has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:53:09,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:09,654 INFO L93 Difference]: Finished difference Result 1032 states and 1677 transitions. [2021-11-12 22:53:09,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:53:09,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 145 [2021-11-12 22:53:09,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:09,661 INFO L225 Difference]: With dead ends: 1032 [2021-11-12 22:53:09,661 INFO L226 Difference]: Without dead ends: 545 [2021-11-12 22:53:09,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:09,665 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 176 mSDsluCounter, 3339 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 4179 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.08ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:09,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 4179 Invalid, 63 Unknown, 0 Unchecked, 5.08ms Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 95.97ms Time] [2021-11-12 22:53:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-12 22:53:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2021-11-12 22:53:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 422 states have (on average 1.6161137440758293) internal successors, (682), 441 states have internal predecessors, (682), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:53:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 871 transitions. [2021-11-12 22:53:09,687 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 871 transitions. Word has length 145 [2021-11-12 22:53:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:09,687 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 871 transitions. [2021-11-12 22:53:09,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:53:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 871 transitions. [2021-11-12 22:53:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 22:53:09,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:09,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:09,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:09,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:09,909 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:09,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:09,909 INFO L85 PathProgramCache]: Analyzing trace with hash -159360227, now seen corresponding path program 1 times [2021-11-12 22:53:09,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:09,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387406439] [2021-11-12 22:53:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:09,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:09,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:09,911 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:09,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:53:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:10,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:53:10,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:10,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:11,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:11,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387406439] [2021-11-12 22:53:11,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387406439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:11,288 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:11,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:53:11,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228660490] [2021-11-12 22:53:11,288 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:11,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:53:11,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:11,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:53:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:11,290 INFO L87 Difference]: Start difference. First operand 545 states and 871 transitions. Second operand has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:11,467 INFO L93 Difference]: Finished difference Result 1018 states and 1655 transitions. [2021-11-12 22:53:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:53:11,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 146 [2021-11-12 22:53:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:11,474 INFO L225 Difference]: With dead ends: 1018 [2021-11-12 22:53:11,474 INFO L226 Difference]: Without dead ends: 545 [2021-11-12 22:53:11,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:53:11,477 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 92 mSDsluCounter, 4920 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 5756 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.09ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:11,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 5756 Invalid, 104 Unknown, 0 Unchecked, 7.09ms Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 116.91ms Time] [2021-11-12 22:53:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-12 22:53:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2021-11-12 22:53:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 422 states have (on average 1.613744075829384) internal successors, (681), 441 states have internal predecessors, (681), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:53:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 870 transitions. [2021-11-12 22:53:11,500 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 870 transitions. Word has length 146 [2021-11-12 22:53:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:11,500 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 870 transitions. [2021-11-12 22:53:11,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 870 transitions. [2021-11-12 22:53:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 22:53:11,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:11,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:11,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:11,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:11,725 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:11,725 INFO L85 PathProgramCache]: Analyzing trace with hash -223770996, now seen corresponding path program 1 times [2021-11-12 22:53:11,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:11,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828445184] [2021-11-12 22:53:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:11,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:11,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:11,727 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:11,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:53:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:12,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:53:12,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:12,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:13,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:13,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828445184] [2021-11-12 22:53:13,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828445184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:13,043 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:13,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:53:13,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783977452] [2021-11-12 22:53:13,044 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:13,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:53:13,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:13,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:53:13,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:13,045 INFO L87 Difference]: Start difference. First operand 545 states and 870 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:13,259 INFO L93 Difference]: Finished difference Result 1062 states and 1712 transitions. [2021-11-12 22:53:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:53:13,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-12 22:53:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:13,265 INFO L225 Difference]: With dead ends: 1062 [2021-11-12 22:53:13,266 INFO L226 Difference]: Without dead ends: 542 [2021-11-12 22:53:13,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:53:13,270 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 101 mSDsluCounter, 7332 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 8156 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.31ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:13,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 8156 Invalid, 146 Unknown, 0 Unchecked, 11.31ms Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 138.07ms Time] [2021-11-12 22:53:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-12 22:53:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-11-12 22:53:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 419 states have (on average 1.6062052505966586) internal successors, (673), 438 states have internal predecessors, (673), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:53:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 862 transitions. [2021-11-12 22:53:13,294 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 862 transitions. Word has length 147 [2021-11-12 22:53:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:13,295 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 862 transitions. [2021-11-12 22:53:13,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 862 transitions. [2021-11-12 22:53:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 22:53:13,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:13,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:13,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:13,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:13,521 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash 323218562, now seen corresponding path program 1 times [2021-11-12 22:53:13,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:13,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202827296] [2021-11-12 22:53:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:13,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:13,524 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:13,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:53:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:53:13,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:14,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:14,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:14,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202827296] [2021-11-12 22:53:14,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202827296] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:14,763 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:14,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:53:14,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901211473] [2021-11-12 22:53:14,763 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:14,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:53:14,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:14,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:53:14,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:14,765 INFO L87 Difference]: Start difference. First operand 542 states and 862 transitions. Second operand has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:14,980 INFO L93 Difference]: Finished difference Result 1009 states and 1635 transitions. [2021-11-12 22:53:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:53:14,983 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 148 [2021-11-12 22:53:14,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:14,988 INFO L225 Difference]: With dead ends: 1009 [2021-11-12 22:53:14,989 INFO L226 Difference]: Without dead ends: 542 [2021-11-12 22:53:14,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:53:14,993 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 100 mSDsluCounter, 5718 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6543 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.18ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:14,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 6543 Invalid, 127 Unknown, 0 Unchecked, 6.57ms Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 156.18ms Time] [2021-11-12 22:53:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-12 22:53:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-11-12 22:53:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 419 states have (on average 1.60381861575179) internal successors, (672), 438 states have internal predecessors, (672), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:53:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 861 transitions. [2021-11-12 22:53:15,045 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 861 transitions. Word has length 148 [2021-11-12 22:53:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:15,045 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 861 transitions. [2021-11-12 22:53:15,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 861 transitions. [2021-11-12 22:53:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 22:53:15,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:15,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:15,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:15,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:15,272 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash -285850819, now seen corresponding path program 1 times [2021-11-12 22:53:15,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:15,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497765197] [2021-11-12 22:53:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:15,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:15,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:15,275 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:15,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:53:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:15,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:53:15,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:16,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:16,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:16,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497765197] [2021-11-12 22:53:16,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497765197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:16,513 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:16,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:53:16,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313351400] [2021-11-12 22:53:16,514 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:16,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:53:16,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:16,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:53:16,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:16,515 INFO L87 Difference]: Start difference. First operand 542 states and 861 transitions. Second operand has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:16,745 INFO L93 Difference]: Finished difference Result 1047 states and 1680 transitions. [2021-11-12 22:53:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:53:16,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 149 [2021-11-12 22:53:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:16,751 INFO L225 Difference]: With dead ends: 1047 [2021-11-12 22:53:16,751 INFO L226 Difference]: Without dead ends: 539 [2021-11-12 22:53:16,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:53:16,754 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 69 mSDsluCounter, 8124 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 8947 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.16ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.51ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:16,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 8947 Invalid, 150 Unknown, 0 Unchecked, 8.16ms Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 158.51ms Time] [2021-11-12 22:53:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-12 22:53:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-11-12 22:53:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 416 states have (on average 1.5961538461538463) internal successors, (664), 435 states have internal predecessors, (664), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:53:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 853 transitions. [2021-11-12 22:53:16,775 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 853 transitions. Word has length 149 [2021-11-12 22:53:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:16,776 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 853 transitions. [2021-11-12 22:53:16,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:53:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 853 transitions. [2021-11-12 22:53:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 22:53:16,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:16,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:16,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:17,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:17,000 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:17,000 INFO L85 PathProgramCache]: Analyzing trace with hash -822475609, now seen corresponding path program 1 times [2021-11-12 22:53:17,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:17,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342633643] [2021-11-12 22:53:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:17,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:17,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:17,003 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:17,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:53:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:17,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:53:17,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:53:18,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:18,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342633643] [2021-11-12 22:53:18,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342633643] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:18,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:18,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:53:18,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241043553] [2021-11-12 22:53:18,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:18,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:18,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:18,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:18,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:18,350 INFO L87 Difference]: Start difference. First operand 539 states and 853 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:53:20,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:22,399 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 22:53:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:23,188 INFO L93 Difference]: Finished difference Result 1002 states and 1644 transitions. [2021-11-12 22:53:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:23,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 150 [2021-11-12 22:53:23,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:23,197 INFO L225 Difference]: With dead ends: 1002 [2021-11-12 22:53:23,197 INFO L226 Difference]: Without dead ends: 543 [2021-11-12 22:53:23,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:53:23,201 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 769 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4675.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.36ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4780.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:23,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 2081 Invalid, 441 Unknown, 0 Unchecked, 9.36ms Time], IncrementalHoareTripleChecker [16 Valid, 423 Invalid, 2 Unknown, 0 Unchecked, 4780.46ms Time] [2021-11-12 22:53:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-12 22:53:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2021-11-12 22:53:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 419 states have (on average 1.5918854415274464) internal successors, (667), 438 states have internal predecessors, (667), 97 states have call successors, (97), 27 states have call predecessors, (97), 26 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-12 22:53:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 857 transitions. [2021-11-12 22:53:23,244 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 857 transitions. Word has length 150 [2021-11-12 22:53:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:23,244 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 857 transitions. [2021-11-12 22:53:23,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:53:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 857 transitions. [2021-11-12 22:53:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 22:53:23,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:23,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:23,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:23,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:23,469 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:23,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1896374087, now seen corresponding path program 1 times [2021-11-12 22:53:23,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:23,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275707763] [2021-11-12 22:53:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:23,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:23,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:23,471 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:23,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:53:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:24,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:24,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:53:24,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:53:24,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:24,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275707763] [2021-11-12 22:53:24,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275707763] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:24,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:24,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:53:24,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165297259] [2021-11-12 22:53:24,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:24,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:24,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:24,935 INFO L87 Difference]: Start difference. First operand 543 states and 857 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:53:26,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:28,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:29,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:29,817 INFO L93 Difference]: Finished difference Result 1011 states and 1651 transitions. [2021-11-12 22:53:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:29,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2021-11-12 22:53:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:29,824 INFO L225 Difference]: With dead ends: 1011 [2021-11-12 22:53:29,824 INFO L226 Difference]: Without dead ends: 548 [2021-11-12 22:53:29,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:53:29,827 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 754 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4714.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.98ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4825.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:29,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 2082 Invalid, 443 Unknown, 0 Unchecked, 6.98ms Time], IncrementalHoareTripleChecker [14 Valid, 427 Invalid, 2 Unknown, 0 Unchecked, 4825.62ms Time] [2021-11-12 22:53:29,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-12 22:53:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2021-11-12 22:53:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 423 states have (on average 1.58628841607565) internal successors, (671), 442 states have internal predecessors, (671), 97 states have call successors, (97), 28 states have call predecessors, (97), 27 states have return successors, (94), 90 states have call predecessors, (94), 92 states have call successors, (94) [2021-11-12 22:53:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 862 transitions. [2021-11-12 22:53:29,854 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 862 transitions. Word has length 152 [2021-11-12 22:53:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:29,855 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 862 transitions. [2021-11-12 22:53:29,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:53:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 862 transitions. [2021-11-12 22:53:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 22:53:29,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:29,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:29,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:30,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:30,079 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:30,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:30,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1493371545, now seen corresponding path program 1 times [2021-11-12 22:53:30,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:30,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013511912] [2021-11-12 22:53:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:30,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:30,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:30,081 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:30,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:53:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:30,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:30,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:53:30,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:53:31,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:31,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013511912] [2021-11-12 22:53:31,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013511912] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:31,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:31,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:53:31,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946365771] [2021-11-12 22:53:31,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:31,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:31,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:31,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:31,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:31,393 INFO L87 Difference]: Start difference. First operand 548 states and 862 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:53:33,419 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:35,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:36,106 INFO L93 Difference]: Finished difference Result 1022 states and 1660 transitions. [2021-11-12 22:53:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:36,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2021-11-12 22:53:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:36,110 INFO L225 Difference]: With dead ends: 1022 [2021-11-12 22:53:36,110 INFO L226 Difference]: Without dead ends: 554 [2021-11-12 22:53:36,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:53:36,114 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 755 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4582.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.04ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4673.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:36,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 2082 Invalid, 442 Unknown, 0 Unchecked, 5.04ms Time], IncrementalHoareTripleChecker [12 Valid, 428 Invalid, 2 Unknown, 0 Unchecked, 4673.55ms Time] [2021-11-12 22:53:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-12 22:53:36,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-11-12 22:53:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 428 states have (on average 1.5794392523364487) internal successors, (676), 447 states have internal predecessors, (676), 97 states have call successors, (97), 29 states have call predecessors, (97), 28 states have return successors, (95), 90 states have call predecessors, (95), 92 states have call successors, (95) [2021-11-12 22:53:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 868 transitions. [2021-11-12 22:53:36,136 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 868 transitions. Word has length 154 [2021-11-12 22:53:36,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:36,137 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 868 transitions. [2021-11-12 22:53:36,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:53:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 868 transitions. [2021-11-12 22:53:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 22:53:36,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:36,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:36,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:36,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:36,362 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:36,363 INFO L85 PathProgramCache]: Analyzing trace with hash 218086001, now seen corresponding path program 1 times [2021-11-12 22:53:36,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:36,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891627017] [2021-11-12 22:53:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:36,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:36,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:36,364 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:36,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:53:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:36,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:36,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:53:37,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:53:37,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:37,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891627017] [2021-11-12 22:53:37,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891627017] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:37,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:37,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:53:37,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313924536] [2021-11-12 22:53:37,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:37,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:37,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:37,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:37,823 INFO L87 Difference]: Start difference. First operand 554 states and 868 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:53:39,841 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:41,848 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:42,572 INFO L93 Difference]: Finished difference Result 1035 states and 1671 transitions. [2021-11-12 22:53:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:42,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 156 [2021-11-12 22:53:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:42,576 INFO L225 Difference]: With dead ends: 1035 [2021-11-12 22:53:42,576 INFO L226 Difference]: Without dead ends: 561 [2021-11-12 22:53:42,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:53:42,579 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 767 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4590.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.01ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4703.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:42,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 2082 Invalid, 441 Unknown, 0 Unchecked, 5.01ms Time], IncrementalHoareTripleChecker [10 Valid, 429 Invalid, 2 Unknown, 0 Unchecked, 4703.45ms Time] [2021-11-12 22:53:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-12 22:53:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-12 22:53:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 434 states have (on average 1.5714285714285714) internal successors, (682), 453 states have internal predecessors, (682), 97 states have call successors, (97), 30 states have call predecessors, (97), 29 states have return successors, (96), 90 states have call predecessors, (96), 92 states have call successors, (96) [2021-11-12 22:53:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 875 transitions. [2021-11-12 22:53:42,607 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 875 transitions. Word has length 156 [2021-11-12 22:53:42,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:42,607 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 875 transitions. [2021-11-12 22:53:42,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:53:42,608 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 875 transitions. [2021-11-12 22:53:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 22:53:42,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:42,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:42,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-12 22:53:42,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:42,829 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash 354055207, now seen corresponding path program 1 times [2021-11-12 22:53:42,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:42,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317442427] [2021-11-12 22:53:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:42,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:42,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:42,831 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:42,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:53:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:43,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:53:43,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:53:43,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:53:44,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:44,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317442427] [2021-11-12 22:53:44,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317442427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:44,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [771795467] [2021-11-12 22:53:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:44,987 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:44,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:44,993 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:45,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 22:53:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:45,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:53:45,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:53:45,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:53:46,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [771795467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:46,847 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:46,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:53:46,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913930868] [2021-11-12 22:53:46,848 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:46,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:46,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:46,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:46,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:53:46,849 INFO L87 Difference]: Start difference. First operand 561 states and 875 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 22:53:48,878 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:49,506 INFO L93 Difference]: Finished difference Result 1038 states and 1657 transitions. [2021-11-12 22:53:49,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:49,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 158 [2021-11-12 22:53:49,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:49,511 INFO L225 Difference]: With dead ends: 1038 [2021-11-12 22:53:49,511 INFO L226 Difference]: Without dead ends: 557 [2021-11-12 22:53:49,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:53:49,514 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 1223 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 349 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2499.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.23ms SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2595.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:49,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 753 Invalid, 448 Unknown, 0 Unchecked, 4.23ms Time], IncrementalHoareTripleChecker [349 Valid, 98 Invalid, 1 Unknown, 0 Unchecked, 2595.56ms Time] [2021-11-12 22:53:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-12 22:53:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-12 22:53:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 432 states have (on average 1.5671296296296295) internal successors, (677), 450 states have internal predecessors, (677), 95 states have call successors, (95), 30 states have call predecessors, (95), 29 states have return successors, (95), 89 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-12 22:53:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 867 transitions. [2021-11-12 22:53:49,544 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 867 transitions. Word has length 158 [2021-11-12 22:53:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:49,546 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 867 transitions. [2021-11-12 22:53:49,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 22:53:49,546 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 867 transitions. [2021-11-12 22:53:49,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-12 22:53:49,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:49,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:49,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:49,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-12 22:53:49,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:49,970 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:49,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1909330790, now seen corresponding path program 1 times [2021-11-12 22:53:49,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:49,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845870054] [2021-11-12 22:53:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:49,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:49,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:49,973 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:49,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:53:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:50,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:53:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:53:51,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:53:52,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:52,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845870054] [2021-11-12 22:53:52,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845870054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:52,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1864728313] [2021-11-12 22:53:52,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:52,087 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:52,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:52,093 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:52,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 22:53:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:52,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:53:52,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:53:52,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:53:53,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1864728313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:53,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494930787] [2021-11-12 22:53:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:53,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:53:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:53,820 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:53:53,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-12 22:53:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:54,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:53:54,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:53:54,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:53:55,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494930787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:55,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:53:55,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 22:53:55,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771526679] [2021-11-12 22:53:55,363 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:53:55,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:53:55,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:55,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:53:55,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:53:55,365 INFO L87 Difference]: Start difference. First operand 557 states and 867 transitions. Second operand has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:53:57,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:59,406 WARN L515 Checker$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 22:54:01,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:03,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:05,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:07,426 WARN L515 Checker$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 22:54:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:16,801 INFO L93 Difference]: Finished difference Result 1776 states and 2888 transitions. [2021-11-12 22:54:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:54:16,803 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) Word has length 159 [2021-11-12 22:54:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:16,811 INFO L225 Difference]: With dead ends: 1776 [2021-11-12 22:54:16,811 INFO L226 Difference]: Without dead ends: 1299 [2021-11-12 22:54:16,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:54:16,815 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 5728 mSDsluCounter, 5022 mSDsCounter, 0 mSdLazyCounter, 8759 mSolverCounterSat, 2272 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19801.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5804 SdHoareTripleChecker+Valid, 6704 SdHoareTripleChecker+Invalid, 11037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.55ms SdHoareTripleChecker+Time, 2272 IncrementalHoareTripleChecker+Valid, 8759 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21013.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:16,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5804 Valid, 6704 Invalid, 11037 Unknown, 0 Unchecked, 51.55ms Time], IncrementalHoareTripleChecker [2272 Valid, 8759 Invalid, 6 Unknown, 0 Unchecked, 21013.56ms Time] [2021-11-12 22:54:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-11-12 22:54:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1149. [2021-11-12 22:54:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 870 states have (on average 1.589655172413793) internal successors, (1383), 909 states have internal predecessors, (1383), 219 states have call successors, (219), 53 states have call predecessors, (219), 59 states have return successors, (242), 217 states have call predecessors, (242), 215 states have call successors, (242) [2021-11-12 22:54:16,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1844 transitions. [2021-11-12 22:54:16,886 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1844 transitions. Word has length 159 [2021-11-12 22:54:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:16,886 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1844 transitions. [2021-11-12 22:54:16,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:54:16,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1844 transitions. [2021-11-12 22:54:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 22:54:16,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:16,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:16,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:17,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-12 22:54:17,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-12 22:54:17,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:17,513 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash 958198293, now seen corresponding path program 1 times [2021-11-12 22:54:17,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:17,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748408379] [2021-11-12 22:54:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:17,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:17,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:17,516 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:17,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 22:54:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:17,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:54:17,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:54:18,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:54:18,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:18,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748408379] [2021-11-12 22:54:18,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748408379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:18,707 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:18,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 22:54:18,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259083019] [2021-11-12 22:54:18,707 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:18,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:54:18,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:54:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:54:18,708 INFO L87 Difference]: Start difference. First operand 1149 states and 1844 transitions. Second operand has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:54:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:18,887 INFO L93 Difference]: Finished difference Result 1629 states and 2622 transitions. [2021-11-12 22:54:18,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:54:18,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 161 [2021-11-12 22:54:18,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:18,893 INFO L225 Difference]: With dead ends: 1629 [2021-11-12 22:54:18,893 INFO L226 Difference]: Without dead ends: 550 [2021-11-12 22:54:18,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:54:18,899 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 89 mSDsluCounter, 5564 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 6370 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.90ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:18,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 6370 Invalid, 106 Unknown, 0 Unchecked, 5.71ms Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 113.90ms Time] [2021-11-12 22:54:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-12 22:54:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-12 22:54:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 427 states have (on average 1.5620608899297423) internal successors, (667), 445 states have internal predecessors, (667), 93 states have call successors, (93), 30 states have call predecessors, (93), 29 states have return successors, (93), 87 states have call predecessors, (93), 89 states have call successors, (93) [2021-11-12 22:54:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 853 transitions. [2021-11-12 22:54:18,955 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 853 transitions. Word has length 161 [2021-11-12 22:54:18,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:18,955 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 853 transitions. [2021-11-12 22:54:18,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:54:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 853 transitions. [2021-11-12 22:54:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 22:54:18,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:18,959 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:18,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:19,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:19,180 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:19,181 INFO L85 PathProgramCache]: Analyzing trace with hash 123424149, now seen corresponding path program 1 times [2021-11-12 22:54:19,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:19,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216975125] [2021-11-12 22:54:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:19,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:19,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:19,183 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:19,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 22:54:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:19,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:54:19,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:54:20,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:54:20,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:20,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216975125] [2021-11-12 22:54:20,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216975125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:20,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [762909115] [2021-11-12 22:54:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:20,966 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:20,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:20,966 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:20,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 22:54:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:21,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:54:21,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:54:21,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:54:22,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [762909115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:22,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023338334] [2021-11-12 22:54:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:22,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:54:22,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:54:22,765 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:54:22,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-12 22:54:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:23,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:54:23,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:54:23,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:54:24,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023338334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:24,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:54:24,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 22:54:24,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826343738] [2021-11-12 22:54:24,634 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:54:24,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:54:24,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:24,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:54:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:54:24,636 INFO L87 Difference]: Start difference. First operand 550 states and 853 transitions. Second operand has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:54:26,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:28,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:30,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:32,680 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:34,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:34,774 INFO L93 Difference]: Finished difference Result 1028 states and 1636 transitions. [2021-11-12 22:54:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:54:34,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) Word has length 165 [2021-11-12 22:54:34,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:34,777 INFO L225 Difference]: With dead ends: 1028 [2021-11-12 22:54:34,778 INFO L226 Difference]: Without dead ends: 556 [2021-11-12 22:54:34,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:54:34,780 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 1259 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 357 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9729.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.31ms SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10027.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:34,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1259 Valid, 1932 Invalid, 2539 Unknown, 0 Unchecked, 11.31ms Time], IncrementalHoareTripleChecker [357 Valid, 2178 Invalid, 4 Unknown, 0 Unchecked, 10027.95ms Time] [2021-11-12 22:54:34,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-12 22:54:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 554. [2021-11-12 22:54:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 430 states have (on average 1.558139534883721) internal successors, (670), 448 states have internal predecessors, (670), 93 states have call successors, (93), 30 states have call predecessors, (93), 30 states have return successors, (98), 88 states have call predecessors, (98), 89 states have call successors, (98) [2021-11-12 22:54:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 861 transitions. [2021-11-12 22:54:34,810 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 861 transitions. Word has length 165 [2021-11-12 22:54:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:34,810 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 861 transitions. [2021-11-12 22:54:34,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:54:34,811 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 861 transitions. [2021-11-12 22:54:34,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-12 22:54:34,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:34,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:34,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:35,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:35,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-12 22:54:35,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:54:35,432 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1540362455, now seen corresponding path program 1 times [2021-11-12 22:54:35,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:35,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919709583] [2021-11-12 22:54:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:35,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:35,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:35,434 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:35,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 22:54:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:54:35,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 22:54:36,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 22:54:36,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:36,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919709583] [2021-11-12 22:54:36,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919709583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:36,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2137351733] [2021-11-12 22:54:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:36,786 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:36,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:36,789 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:36,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 22:54:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:37,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:54:37,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 22:54:37,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 22:54:37,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2137351733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:37,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427609939] [2021-11-12 22:54:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:37,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:54:37,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:54:37,984 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:54:37,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-12 22:54:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:38,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:54:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 22:54:38,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 22:54:39,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427609939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:39,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:54:39,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 22:54:39,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148774224] [2021-11-12 22:54:39,250 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:54:39,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:54:39,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:39,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:54:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:54:39,252 INFO L87 Difference]: Start difference. First operand 554 states and 861 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 22:54:41,269 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:43,276 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:45,282 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 22:54:50,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:50,387 INFO L93 Difference]: Finished difference Result 1975 states and 3189 transitions. [2021-11-12 22:54:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:54:50,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) Word has length 166 [2021-11-12 22:54:50,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:50,397 INFO L225 Difference]: With dead ends: 1975 [2021-11-12 22:54:50,397 INFO L226 Difference]: Without dead ends: 1499 [2021-11-12 22:54:50,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:54:50,400 INFO L933 BasicCegarLoop]: 1293 mSDtfsCounter, 3774 mSDsluCounter, 2131 mSDsCounter, 0 mSdLazyCounter, 4639 mSolverCounterSat, 1126 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10120.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3853 SdHoareTripleChecker+Valid, 3424 SdHoareTripleChecker+Invalid, 5768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.23ms SdHoareTripleChecker+Time, 1126 IncrementalHoareTripleChecker+Valid, 4639 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10844.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:50,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3853 Valid, 3424 Invalid, 5768 Unknown, 0 Unchecked, 27.23ms Time], IncrementalHoareTripleChecker [1126 Valid, 4639 Invalid, 3 Unknown, 0 Unchecked, 10844.64ms Time] [2021-11-12 22:54:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-11-12 22:54:50,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1441. [2021-11-12 22:54:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1110 states have (on average 1.581981981981982) internal successors, (1756), 1155 states have internal predecessors, (1756), 253 states have call successors, (253), 77 states have call predecessors, (253), 77 states have return successors, (282), 245 states have call predecessors, (282), 249 states have call successors, (282) [2021-11-12 22:54:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2291 transitions. [2021-11-12 22:54:50,522 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2291 transitions. Word has length 166 [2021-11-12 22:54:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:50,522 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 2291 transitions. [2021-11-12 22:54:50,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 22:54:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2291 transitions. [2021-11-12 22:54:50,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 22:54:50,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:50,525 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:50,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:50,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-12 22:54:50,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:51,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:51,163 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2063772274, now seen corresponding path program 1 times [2021-11-12 22:54:51,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:51,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023018235] [2021-11-12 22:54:51,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:51,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:51,165 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:51,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 22:54:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:51,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:54:51,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:54:51,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:54:52,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:52,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023018235] [2021-11-12 22:54:52,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023018235] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:52,630 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:52,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 22:54:52,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115135752] [2021-11-12 22:54:52,631 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:52,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:54:52,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:54:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:52,632 INFO L87 Difference]: Start difference. First operand 1441 states and 2291 transitions. Second operand has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-12 22:54:54,650 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:56,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:58,662 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:03,781 INFO L93 Difference]: Finished difference Result 4073 states and 6586 transitions. [2021-11-12 22:55:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:55:03,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 168 [2021-11-12 22:55:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:03,802 INFO L225 Difference]: With dead ends: 4073 [2021-11-12 22:55:03,802 INFO L226 Difference]: Without dead ends: 3008 [2021-11-12 22:55:03,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:55:03,807 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 3317 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 4354 mSolverCounterSat, 688 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10064.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3390 SdHoareTripleChecker+Valid, 2806 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.43ms SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 4354 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10716.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:03,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3390 Valid, 2806 Invalid, 5045 Unknown, 0 Unchecked, 23.43ms Time], IncrementalHoareTripleChecker [688 Valid, 4354 Invalid, 3 Unknown, 0 Unchecked, 10716.48ms Time] [2021-11-12 22:55:03,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-11-12 22:55:03,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2843. [2021-11-12 22:55:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2843 states, 2192 states have (on average 1.5816605839416058) internal successors, (3467), 2282 states have internal predecessors, (3467), 486 states have call successors, (486), 144 states have call predecessors, (486), 164 states have return successors, (610), 477 states have call predecessors, (610), 482 states have call successors, (610) [2021-11-12 22:55:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2843 states to 2843 states and 4563 transitions. [2021-11-12 22:55:03,994 INFO L78 Accepts]: Start accepts. Automaton has 2843 states and 4563 transitions. Word has length 168 [2021-11-12 22:55:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:03,994 INFO L470 AbstractCegarLoop]: Abstraction has 2843 states and 4563 transitions. [2021-11-12 22:55:03,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-12 22:55:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2843 states and 4563 transitions. [2021-11-12 22:55:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 22:55:03,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:03,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:04,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:04,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:04,213 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:04,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1583264046, now seen corresponding path program 1 times [2021-11-12 22:55:04,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:04,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672520733] [2021-11-12 22:55:04,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:04,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:04,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:04,215 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:04,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 22:55:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:04,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:55:04,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:55:05,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:55:06,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:06,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672520733] [2021-11-12 22:55:06,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672520733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:06,230 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:06,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-12 22:55:06,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583154236] [2021-11-12 22:55:06,230 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:06,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:55:06,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:06,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:55:06,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:55:06,232 INFO L87 Difference]: Start difference. First operand 2843 states and 4563 transitions. Second operand has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 22:55:08,250 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:10,255 WARN L515 Checker$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 22:55:12,261 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:14,265 WARN L515 Checker$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 22:55:17,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:17,546 INFO L93 Difference]: Finished difference Result 5284 states and 8538 transitions. [2021-11-12 22:55:17,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:17,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) Word has length 170 [2021-11-12 22:55:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:17,568 INFO L225 Difference]: With dead ends: 5284 [2021-11-12 22:55:17,568 INFO L226 Difference]: Without dead ends: 2819 [2021-11-12 22:55:17,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:55:17,579 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 1500 mSDsluCounter, 2393 mSDsCounter, 0 mSdLazyCounter, 4229 mSolverCounterSat, 370 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10658.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1500 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 4603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.83ms SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 4229 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11073.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:17,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1500 Valid, 3116 Invalid, 4603 Unknown, 0 Unchecked, 15.83ms Time], IncrementalHoareTripleChecker [370 Valid, 4229 Invalid, 4 Unknown, 0 Unchecked, 11073.81ms Time] [2021-11-12 22:55:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-11-12 22:55:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2819. [2021-11-12 22:55:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2179 states have (on average 1.5819183111519046) internal successors, (3447), 2267 states have internal predecessors, (3447), 479 states have call successors, (479), 142 states have call predecessors, (479), 160 states have return successors, (599), 470 states have call predecessors, (599), 475 states have call successors, (599) [2021-11-12 22:55:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4525 transitions. [2021-11-12 22:55:17,765 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4525 transitions. Word has length 170 [2021-11-12 22:55:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:17,765 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 4525 transitions. [2021-11-12 22:55:17,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 22:55:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4525 transitions. [2021-11-12 22:55:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-12 22:55:17,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:17,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:17,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:17,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:17,985 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:17,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1492568044, now seen corresponding path program 1 times [2021-11-12 22:55:17,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:17,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772580287] [2021-11-12 22:55:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:17,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:17,989 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:18,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 22:55:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:55:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:55:19,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:55:20,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:20,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772580287] [2021-11-12 22:55:20,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772580287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:20,104 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:20,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 22:55:20,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215397253] [2021-11-12 22:55:20,105 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:20,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:55:20,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:55:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:55:20,106 INFO L87 Difference]: Start difference. First operand 2819 states and 4525 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-12 22:55:22,148 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:24,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:26,159 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:28,164 WARN L515 Checker$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 22:55:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:35,474 INFO L93 Difference]: Finished difference Result 7474 states and 12037 transitions. [2021-11-12 22:55:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:55:35,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) Word has length 173 [2021-11-12 22:55:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:35,499 INFO L225 Difference]: With dead ends: 7474 [2021-11-12 22:55:35,499 INFO L226 Difference]: Without dead ends: 4981 [2021-11-12 22:55:35,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:55:35,506 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 3892 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 6790 mSolverCounterSat, 1126 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13785.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3967 SdHoareTripleChecker+Valid, 3417 SdHoareTripleChecker+Invalid, 7920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.46ms SdHoareTripleChecker+Time, 1126 IncrementalHoareTripleChecker+Valid, 6790 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14706.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:35,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3967 Valid, 3417 Invalid, 7920 Unknown, 0 Unchecked, 30.46ms Time], IncrementalHoareTripleChecker [1126 Valid, 6790 Invalid, 4 Unknown, 0 Unchecked, 14706.97ms Time] [2021-11-12 22:55:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4981 states. [2021-11-12 22:55:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4981 to 4931. [2021-11-12 22:55:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3794 states have (on average 1.56615709014233) internal successors, (5942), 3947 states have internal predecessors, (5942), 839 states have call successors, (839), 268 states have call predecessors, (839), 297 states have return successors, (1075), 823 states have call predecessors, (1075), 835 states have call successors, (1075) [2021-11-12 22:55:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7856 transitions. [2021-11-12 22:55:35,847 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7856 transitions. Word has length 173 [2021-11-12 22:55:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:35,848 INFO L470 AbstractCegarLoop]: Abstraction has 4931 states and 7856 transitions. [2021-11-12 22:55:35,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-12 22:55:35,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7856 transitions. [2021-11-12 22:55:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-12 22:55:35,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:35,851 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:35,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:36,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:36,065 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:36,065 INFO L85 PathProgramCache]: Analyzing trace with hash 723387861, now seen corresponding path program 1 times [2021-11-12 22:55:36,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:36,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378105977] [2021-11-12 22:55:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:36,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:36,067 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:36,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 22:55:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:36,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:55:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:55:36,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:55:37,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:37,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378105977] [2021-11-12 22:55:37,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378105977] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:37,259 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:37,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:55:37,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584991345] [2021-11-12 22:55:37,260 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:37,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:55:37,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:37,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:55:37,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:55:37,261 INFO L87 Difference]: Start difference. First operand 4931 states and 7856 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 22:55:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:37,639 INFO L93 Difference]: Finished difference Result 9810 states and 15820 transitions. [2021-11-12 22:55:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:37,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 180 [2021-11-12 22:55:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:37,669 INFO L225 Difference]: With dead ends: 9810 [2021-11-12 22:55:37,669 INFO L226 Difference]: Without dead ends: 4931 [2021-11-12 22:55:37,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:55:37,685 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 567 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 3056 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.72ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:37,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 3056 Invalid, 142 Unknown, 0 Unchecked, 3.72ms Time], IncrementalHoareTripleChecker [50 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 116.95ms Time] [2021-11-12 22:55:37,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2021-11-12 22:55:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 4931. [2021-11-12 22:55:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3794 states have (on average 1.5498154981549817) internal successors, (5880), 3947 states have internal predecessors, (5880), 839 states have call successors, (839), 268 states have call predecessors, (839), 297 states have return successors, (1075), 823 states have call predecessors, (1075), 835 states have call successors, (1075) [2021-11-12 22:55:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7794 transitions. [2021-11-12 22:55:38,021 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7794 transitions. Word has length 180 [2021-11-12 22:55:38,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:38,022 INFO L470 AbstractCegarLoop]: Abstraction has 4931 states and 7794 transitions. [2021-11-12 22:55:38,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 22:55:38,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7794 transitions. [2021-11-12 22:55:38,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-12 22:55:38,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:38,026 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:38,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:38,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:38,247 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:38,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:38,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1302051725, now seen corresponding path program 1 times [2021-11-12 22:55:38,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:38,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684386502] [2021-11-12 22:55:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:38,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:38,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:38,250 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:38,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 22:55:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:38,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:55:38,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 22:55:39,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 22:55:39,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:39,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684386502] [2021-11-12 22:55:39,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684386502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:39,690 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:39,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 22:55:39,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38198] [2021-11-12 22:55:39,690 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:39,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:55:39,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:39,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:55:39,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:55:39,692 INFO L87 Difference]: Start difference. First operand 4931 states and 7794 transitions. Second operand has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 22:55:41,710 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:43,717 WARN L515 Checker$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 22:55:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:47,577 INFO L93 Difference]: Finished difference Result 9964 states and 15875 transitions. [2021-11-12 22:55:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:55:47,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) Word has length 185 [2021-11-12 22:55:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:47,606 INFO L225 Difference]: With dead ends: 9964 [2021-11-12 22:55:47,607 INFO L226 Difference]: Without dead ends: 5502 [2021-11-12 22:55:47,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:55:47,621 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 3119 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 3516 mSolverCounterSat, 847 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6973.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3196 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 4365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.89ms SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 3516 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7477.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:47,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3196 Valid, 2237 Invalid, 4365 Unknown, 0 Unchecked, 18.89ms Time], IncrementalHoareTripleChecker [847 Valid, 3516 Invalid, 2 Unknown, 0 Unchecked, 7477.28ms Time] [2021-11-12 22:55:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2021-11-12 22:55:47,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 5113. [2021-11-12 22:55:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5113 states, 3930 states have (on average 1.5414758269720101) internal successors, (6058), 4093 states have internal predecessors, (6058), 858 states have call successors, (858), 286 states have call predecessors, (858), 324 states have return successors, (1118), 841 states have call predecessors, (1118), 854 states have call successors, (1118) [2021-11-12 22:55:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 8034 transitions. [2021-11-12 22:55:47,938 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 8034 transitions. Word has length 185 [2021-11-12 22:55:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:47,939 INFO L470 AbstractCegarLoop]: Abstraction has 5113 states and 8034 transitions. [2021-11-12 22:55:47,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 22:55:47,939 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 8034 transitions. [2021-11-12 22:55:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 22:55:47,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:47,942 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:47,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-12 22:55:48,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:48,142 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:48,143 INFO L85 PathProgramCache]: Analyzing trace with hash 978350052, now seen corresponding path program 1 times [2021-11-12 22:55:48,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:48,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666104941] [2021-11-12 22:55:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:48,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:48,144 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:48,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 22:55:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:48,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:55:48,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 22:55:49,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 22:55:49,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:49,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666104941] [2021-11-12 22:55:49,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666104941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:49,950 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:49,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:55:49,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819992910] [2021-11-12 22:55:49,950 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:49,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:55:49,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:55:49,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:49,952 INFO L87 Difference]: Start difference. First operand 5113 states and 8034 transitions. Second operand has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-12 22:55:51,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:53,975 WARN L515 Checker$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 22:56:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:00,905 INFO L93 Difference]: Finished difference Result 13554 states and 21551 transitions. [2021-11-12 22:56:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:56:00,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) Word has length 190 [2021-11-12 22:56:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:00,945 INFO L225 Difference]: With dead ends: 13554 [2021-11-12 22:56:00,945 INFO L226 Difference]: Without dead ends: 8908 [2021-11-12 22:56:00,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:56:00,961 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 3678 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 6510 mSolverCounterSat, 1059 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9387.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3750 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 7571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.75ms SdHoareTripleChecker+Time, 1059 IncrementalHoareTripleChecker+Valid, 6510 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10189.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:00,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3750 Valid, 3111 Invalid, 7571 Unknown, 0 Unchecked, 27.75ms Time], IncrementalHoareTripleChecker [1059 Valid, 6510 Invalid, 2 Unknown, 0 Unchecked, 10189.48ms Time] [2021-11-12 22:56:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8908 states. [2021-11-12 22:56:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8908 to 8858. [2021-11-12 22:56:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 6809 states have (on average 1.5495667498898518) internal successors, (10551), 7071 states have internal predecessors, (10551), 1506 states have call successors, (1506), 518 states have call predecessors, (1506), 542 states have return successors, (1918), 1472 states have call predecessors, (1918), 1502 states have call successors, (1918) [2021-11-12 22:56:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 13975 transitions. [2021-11-12 22:56:01,513 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 13975 transitions. Word has length 190 [2021-11-12 22:56:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:01,513 INFO L470 AbstractCegarLoop]: Abstraction has 8858 states and 13975 transitions. [2021-11-12 22:56:01,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-12 22:56:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 13975 transitions. [2021-11-12 22:56:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 22:56:01,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:01,516 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:01,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-11-12 22:56:01,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:01,717 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:01,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:01,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1930413850, now seen corresponding path program 1 times [2021-11-12 22:56:01,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:01,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421846118] [2021-11-12 22:56:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:01,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:01,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:01,719 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:01,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 22:56:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:56:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:56:02,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:56:03,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:03,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421846118] [2021-11-12 22:56:03,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421846118] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:03,730 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:03,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-12 22:56:03,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747062197] [2021-11-12 22:56:03,730 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:03,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:56:03,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:56:03,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:56:03,731 INFO L87 Difference]: Start difference. First operand 8858 states and 13975 transitions. Second operand has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-12 22:56:05,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:07,755 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:09,761 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:11,767 WARN L515 Checker$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 22:56:13,774 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:23,319 INFO L93 Difference]: Finished difference Result 23665 states and 38518 transitions. [2021-11-12 22:56:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-12 22:56:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) Word has length 190 [2021-11-12 22:56:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:23,414 INFO L225 Difference]: With dead ends: 23665 [2021-11-12 22:56:23,415 INFO L226 Difference]: Without dead ends: 13864 [2021-11-12 22:56:23,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:56:23,461 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 3424 mSDsluCounter, 3362 mSDsCounter, 0 mSdLazyCounter, 8259 mSolverCounterSat, 1044 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17435.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 4367 SdHoareTripleChecker+Invalid, 9308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.99ms SdHoareTripleChecker+Time, 1044 IncrementalHoareTripleChecker+Valid, 8259 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18499.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:23,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3521 Valid, 4367 Invalid, 9308 Unknown, 0 Unchecked, 35.99ms Time], IncrementalHoareTripleChecker [1044 Valid, 8259 Invalid, 5 Unknown, 0 Unchecked, 18499.75ms Time] [2021-11-12 22:56:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2021-11-12 22:56:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 13159. [2021-11-12 22:56:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13159 states, 10099 states have (on average 1.5364887612634914) internal successors, (15517), 10503 states have internal predecessors, (15517), 2230 states have call successors, (2230), 802 states have call predecessors, (2230), 829 states have return successors, (2935), 2153 states have call predecessors, (2935), 2226 states have call successors, (2935) [2021-11-12 22:56:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13159 states to 13159 states and 20682 transitions. [2021-11-12 22:56:24,539 INFO L78 Accepts]: Start accepts. Automaton has 13159 states and 20682 transitions. Word has length 190 [2021-11-12 22:56:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:24,539 INFO L470 AbstractCegarLoop]: Abstraction has 13159 states and 20682 transitions. [2021-11-12 22:56:24,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-12 22:56:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 13159 states and 20682 transitions. [2021-11-12 22:56:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-12 22:56:24,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:24,542 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:24,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:24,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:24,753 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:24,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:24,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2026551840, now seen corresponding path program 1 times [2021-11-12 22:56:24,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:24,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460599068] [2021-11-12 22:56:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:24,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:24,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:24,756 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:24,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-12 22:56:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:25,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:56:25,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 22:56:25,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 22:56:26,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:26,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460599068] [2021-11-12 22:56:26,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460599068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:56:26,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [861409214] [2021-11-12 22:56:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:26,402 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:56:26,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:56:26,405 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:56:26,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-12 22:56:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:26,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:56:26,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:56:27,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:56:27,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [861409214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:27,468 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:56:27,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:56:27,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550355617] [2021-11-12 22:56:27,469 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:27,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:56:27,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:27,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:56:27,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:27,471 INFO L87 Difference]: Start difference. First operand 13159 states and 20682 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-12 22:56:28,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:28,779 INFO L93 Difference]: Finished difference Result 39161 states and 62145 transitions. [2021-11-12 22:56:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:56:28,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 191 [2021-11-12 22:56:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:28,944 INFO L225 Difference]: With dead ends: 39161 [2021-11-12 22:56:28,945 INFO L226 Difference]: Without dead ends: 26080 [2021-11-12 22:56:28,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:28,989 INFO L933 BasicCegarLoop]: 1376 mSDtfsCounter, 745 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.90ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:28,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 2140 Invalid, 10 Unknown, 0 Unchecked, 3.90ms Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 43.60ms Time] [2021-11-12 22:56:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26080 states. [2021-11-12 22:56:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26080 to 25886. [2021-11-12 22:56:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25886 states, 19884 states have (on average 1.5345503922751962) internal successors, (30513), 20676 states have internal predecessors, (30513), 4361 states have call successors, (4361), 1584 states have call predecessors, (4361), 1640 states have return successors, (6043), 4225 states have call predecessors, (6043), 4357 states have call successors, (6043) [2021-11-12 22:56:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25886 states to 25886 states and 40917 transitions. [2021-11-12 22:56:31,014 INFO L78 Accepts]: Start accepts. Automaton has 25886 states and 40917 transitions. Word has length 191 [2021-11-12 22:56:31,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:31,014 INFO L470 AbstractCegarLoop]: Abstraction has 25886 states and 40917 transitions. [2021-11-12 22:56:31,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-12 22:56:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 25886 states and 40917 transitions. [2021-11-12 22:56:31,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 22:56:31,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:31,017 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:31,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:31,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-12 22:56:31,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:31,418 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:31,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:31,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1601265987, now seen corresponding path program 1 times [2021-11-12 22:56:31,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:31,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53858174] [2021-11-12 22:56:31,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:31,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:31,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:31,430 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:31,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-12 22:56:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:31,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:56:31,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 22:56:32,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 22:56:33,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:33,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53858174] [2021-11-12 22:56:33,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53858174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:56:33,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2135116142] [2021-11-12 22:56:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:33,014 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:56:33,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:56:33,015 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:56:33,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-12 22:56:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:56:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 22:56:33,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 22:56:34,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2135116142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:56:34,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717968385] [2021-11-12 22:56:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:34,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:56:34,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:56:34,423 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:56:34,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-12 22:56:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:34,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:56:34,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 22:56:35,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 22:56:35,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717968385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:56:35,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:56:35,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4, 5, 5] total 9 [2021-11-12 22:56:35,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330329175] [2021-11-12 22:56:35,761 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:56:35,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:56:35,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:35,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:56:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:35,763 INFO L87 Difference]: Start difference. First operand 25886 states and 40917 transitions. Second operand has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-12 22:56:37,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:41,615 INFO L93 Difference]: Finished difference Result 39520 states and 62515 transitions. [2021-11-12 22:56:41,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:56:41,616 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) Word has length 192 [2021-11-12 22:56:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:41,739 INFO L225 Difference]: With dead ends: 39520 [2021-11-12 22:56:41,740 INFO L226 Difference]: Without dead ends: 26785 [2021-11-12 22:56:41,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:56:41,780 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 3162 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 887 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4106.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3234 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.35ms SdHoareTripleChecker+Time, 887 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4477.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:41,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3234 Valid, 1725 Invalid, 3066 Unknown, 0 Unchecked, 14.35ms Time], IncrementalHoareTripleChecker [887 Valid, 2178 Invalid, 1 Unknown, 0 Unchecked, 4477.79ms Time] [2021-11-12 22:56:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26785 states. [2021-11-12 22:56:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26785 to 26149. [2021-11-12 22:56:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26149 states, 20070 states have (on average 1.5301943198804184) internal successors, (30711), 20919 states have internal predecessors, (30711), 4385 states have call successors, (4385), 1588 states have call predecessors, (4385), 1693 states have return successors, (6021), 4241 states have call predecessors, (6021), 4381 states have call successors, (6021) [2021-11-12 22:56:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26149 states to 26149 states and 41117 transitions. [2021-11-12 22:56:43,520 INFO L78 Accepts]: Start accepts. Automaton has 26149 states and 41117 transitions. Word has length 192 [2021-11-12 22:56:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:43,521 INFO L470 AbstractCegarLoop]: Abstraction has 26149 states and 41117 transitions. [2021-11-12 22:56:43,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-12 22:56:43,521 INFO L276 IsEmpty]: Start isEmpty. Operand 26149 states and 41117 transitions. [2021-11-12 22:56:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 22:56:43,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:43,525 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:43,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-12 22:56:43,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:43,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:44,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:44,138 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1556626945, now seen corresponding path program 1 times [2021-11-12 22:56:44,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:44,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686905255] [2021-11-12 22:56:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:44,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:44,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:44,140 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:44,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-12 22:56:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:44,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:56:44,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:44,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:56:45,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:45,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686905255] [2021-11-12 22:56:45,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686905255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:45,411 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:45,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:56:45,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437172000] [2021-11-12 22:56:45,411 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:45,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:56:45,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:56:45,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:56:45,412 INFO L87 Difference]: Start difference. First operand 26149 states and 41117 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:56:47,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:49,436 WARN L515 Checker$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 22:56:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:52,517 INFO L93 Difference]: Finished difference Result 64618 states and 101505 transitions. [2021-11-12 22:56:52,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:56:52,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) Word has length 195 [2021-11-12 22:56:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:52,745 INFO L225 Difference]: With dead ends: 64618 [2021-11-12 22:56:52,745 INFO L226 Difference]: Without dead ends: 39180 [2021-11-12 22:56:52,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:52,835 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 463 mSDsluCounter, 4158 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4724.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 5150 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.60ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4847.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:52,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 5150 Invalid, 551 Unknown, 0 Unchecked, 9.60ms Time], IncrementalHoareTripleChecker [18 Valid, 531 Invalid, 2 Unknown, 0 Unchecked, 4847.95ms Time] [2021-11-12 22:56:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39180 states. [2021-11-12 22:56:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39180 to 38077. [2021-11-12 22:56:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38077 states, 29353 states have (on average 1.4748747998501004) internal successors, (43292), 30329 states have internal predecessors, (43292), 6007 states have call successors, (6007), 2561 states have call predecessors, (6007), 2716 states have return successors, (9361), 5786 states have call predecessors, (9361), 6003 states have call successors, (9361) [2021-11-12 22:56:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38077 states to 38077 states and 58660 transitions. [2021-11-12 22:56:55,390 INFO L78 Accepts]: Start accepts. Automaton has 38077 states and 58660 transitions. Word has length 195 [2021-11-12 22:56:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:55,391 INFO L470 AbstractCegarLoop]: Abstraction has 38077 states and 58660 transitions. [2021-11-12 22:56:55,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:56:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 38077 states and 58660 transitions. [2021-11-12 22:56:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 22:56:55,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:55,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:55,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:55,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:55,609 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash 319855873, now seen corresponding path program 1 times [2021-11-12 22:56:55,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:55,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831290112] [2021-11-12 22:56:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:55,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:55,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:55,612 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:55,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-12 22:56:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:56,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:56:56,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:56:56,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:56:57,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:57,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831290112] [2021-11-12 22:56:57,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831290112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:57,308 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:57,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-11-12 22:56:57,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621509447] [2021-11-12 22:56:57,308 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:57,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:56:57,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:57,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:56:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:56:57,309 INFO L87 Difference]: Start difference. First operand 38077 states and 58660 transitions. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 8 states have call successors, (40), 6 states have call predecessors, (40), 5 states have return successors, (39), 8 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-12 22:56:59,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:01,335 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:06,508 INFO L93 Difference]: Finished difference Result 75488 states and 118755 transitions. [2021-11-12 22:57:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:57:06,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 8 states have call successors, (40), 6 states have call predecessors, (40), 5 states have return successors, (39), 8 states have call predecessors, (39), 7 states have call successors, (39) Word has length 195 [2021-11-12 22:57:06,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:06,759 INFO L225 Difference]: With dead ends: 75488 [2021-11-12 22:57:06,759 INFO L226 Difference]: Without dead ends: 38266 [2021-11-12 22:57:07,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:57:07,064 INFO L933 BasicCegarLoop]: 1071 mSDtfsCounter, 1664 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 2123 mSolverCounterSat, 575 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6217.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 2227 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.18ms SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 2123 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6563.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:07,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 2227 Invalid, 2700 Unknown, 0 Unchecked, 14.18ms Time], IncrementalHoareTripleChecker [575 Valid, 2123 Invalid, 2 Unknown, 0 Unchecked, 6563.66ms Time] [2021-11-12 22:57:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38266 states. [2021-11-12 22:57:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38266 to 37675. [2021-11-12 22:57:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37675 states, 27807 states have (on average 1.5011328082856834) internal successors, (41742), 29409 states have internal predecessors, (41742), 7703 states have call successors, (7703), 1947 states have call predecessors, (7703), 2164 states have return successors, (10213), 7494 states have call predecessors, (10213), 7699 states have call successors, (10213) [2021-11-12 22:57:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37675 states to 37675 states and 59658 transitions. [2021-11-12 22:57:09,739 INFO L78 Accepts]: Start accepts. Automaton has 37675 states and 59658 transitions. Word has length 195 [2021-11-12 22:57:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:09,740 INFO L470 AbstractCegarLoop]: Abstraction has 37675 states and 59658 transitions. [2021-11-12 22:57:09,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 8 states have call successors, (40), 6 states have call predecessors, (40), 5 states have return successors, (39), 8 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-12 22:57:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 37675 states and 59658 transitions. [2021-11-12 22:57:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-12 22:57:09,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:09,743 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:09,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-11-12 22:57:09,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:09,945 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:09,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1249884933, now seen corresponding path program 1 times [2021-11-12 22:57:09,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:09,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677710473] [2021-11-12 22:57:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:09,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:09,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:09,947 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:09,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-12 22:57:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:57:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:57:10,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:57:11,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:11,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677710473] [2021-11-12 22:57:11,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677710473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:11,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:11,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-12 22:57:11,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427638894] [2021-11-12 22:57:11,399 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:11,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:57:11,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:11,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:57:11,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:11,400 INFO L87 Difference]: Start difference. First operand 37675 states and 59658 transitions. Second operand has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 4 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (40), 4 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-12 22:57:13,437 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:15,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:18,722 INFO L93 Difference]: Finished difference Result 38085 states and 60367 transitions. [2021-11-12 22:57:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:57:18,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 4 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (40), 4 states have call predecessors, (40), 3 states have call successors, (40) Word has length 197 [2021-11-12 22:57:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:18,911 INFO L225 Difference]: With dead ends: 38085 [2021-11-12 22:57:18,911 INFO L226 Difference]: Without dead ends: 38066 [2021-11-12 22:57:18,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:57:18,933 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 1514 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 263 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4794.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.75ms SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4939.54ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:18,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 2102 Invalid, 698 Unknown, 0 Unchecked, 6.75ms Time], IncrementalHoareTripleChecker [263 Valid, 433 Invalid, 2 Unknown, 0 Unchecked, 4939.54ms Time] [2021-11-12 22:57:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38066 states. [2021-11-12 22:57:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38066 to 37800. [2021-11-12 22:57:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37800 states, 27911 states have (on average 1.5005553366056394) internal successors, (41882), 29508 states have internal predecessors, (41882), 7724 states have call successors, (7724), 1947 states have call predecessors, (7724), 2164 states have return successors, (10242), 7520 states have call predecessors, (10242), 7720 states have call successors, (10242) [2021-11-12 22:57:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37800 states to 37800 states and 59848 transitions. [2021-11-12 22:57:21,723 INFO L78 Accepts]: Start accepts. Automaton has 37800 states and 59848 transitions. Word has length 197 [2021-11-12 22:57:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:21,723 INFO L470 AbstractCegarLoop]: Abstraction has 37800 states and 59848 transitions. [2021-11-12 22:57:21,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 4 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (40), 4 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-12 22:57:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 37800 states and 59848 transitions. [2021-11-12 22:57:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-12 22:57:21,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:21,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:21,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:21,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:21,928 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:21,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1374917526, now seen corresponding path program 1 times [2021-11-12 22:57:21,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:21,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68809062] [2021-11-12 22:57:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:21,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:21,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:21,930 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:21,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5800970c-2e99-41b9-b9a4-12437f1fe9b1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-12 22:57:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:22,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:57:22,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:57:22,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:57:23,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:23,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68809062] [2021-11-12 22:57:23,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68809062] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:23,173 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:23,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:57:23,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747808493] [2021-11-12 22:57:23,173 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:23,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:57:23,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:23,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:57:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:57:23,174 INFO L87 Difference]: Start difference. First operand 37800 states and 59848 transitions. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 6 states have internal predecessors, (133), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 4 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-12 22:57:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:25,462 INFO L93 Difference]: Finished difference Result 37819 states and 59868 transitions. [2021-11-12 22:57:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:57:25,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 6 states have internal predecessors, (133), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 4 states have call predecessors, (22), 1 states have call successors, (22) Word has length 203 [2021-11-12 22:57:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:25,631 INFO L225 Difference]: With dead ends: 37819 [2021-11-12 22:57:25,631 INFO L226 Difference]: Without dead ends: 37800 [2021-11-12 22:57:25,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:25,654 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 37 mSDsluCounter, 3936 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4742 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.35ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:25,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 4742 Invalid, 14 Unknown, 0 Unchecked, 4.35ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 9.15ms Time] [2021-11-12 22:57:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37800 states.