./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/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 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:18:56,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:18:56,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:18:56,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:18:56,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:18:56,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:18:56,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:18:56,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:18:56,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:18:56,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:18:56,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:18:56,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:18:56,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:18:56,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:18:56,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:18:56,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:18:56,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:18:56,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:18:56,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:18:56,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:18:56,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:18:56,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:18:56,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:18:56,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:18:56,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:18:56,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:18:56,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:18:56,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:18:56,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:18:56,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:18:56,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:18:56,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:18:56,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:18:56,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:18:56,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:18:56,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:18:56,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:18:56,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:18:56,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:18:56,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:18:56,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:18:56,455 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:18:56,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:18:56,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:18:56,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:18:56,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:18:56,514 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:18:56,514 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:18:56,515 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:18:56,515 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:18:56,523 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:18:56,523 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:18:56,523 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:18:56,524 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:18:56,524 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:18:56,526 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:18:56,526 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:18:56,526 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:18:56,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:18:56,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:18:56,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:18:56,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:18:56,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:18:56,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:18:56,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:18:56,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:18:56,529 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:18:56,530 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:18:56,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:18:56,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:18:56,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:18:56,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:18:56,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:18:56,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:18:56,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:18:56,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:18:56,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:18:56,535 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:18:56,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:18:56,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:18:56,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:18:56,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:18:56,536 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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 [2021-11-12 22:18:56,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:18:56,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:18:56,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:18:56,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:18:56,851 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:18:56,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-12 22:18:56,934 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/data/4d9edc3a7/cb2db8e755ae44d489500672825647ff/FLAG5914b9edf [2021-11-12 22:18:57,614 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:18:57,614 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-12 22:18:57,667 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/data/4d9edc3a7/cb2db8e755ae44d489500672825647ff/FLAG5914b9edf [2021-11-12 22:18:57,938 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/data/4d9edc3a7/cb2db8e755ae44d489500672825647ff [2021-11-12 22:18:57,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:18:57,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:18:57,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:18:57,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:18:57,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:18:57,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:18:57" (1/1) ... [2021-11-12 22:18:57,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9574406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:57, skipping insertion in model container [2021-11-12 22:18:57,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:18:57" (1/1) ... [2021-11-12 22:18:57,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:18:58,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:18:58,365 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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-12 22:18:58,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:18:58,668 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 22:18:58,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@280efc1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:58, skipping insertion in model container [2021-11-12 22:18:58,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:18:58,670 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:18:58,672 INFO L158 Benchmark]: Toolchain (without parser) took 728.11ms. Allocated memory is still 121.6MB. Free memory was 89.1MB in the beginning and 81.6MB in the end (delta: 7.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:18:58,672 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 121.6MB. Free memory was 77.7MB in the beginning and 77.6MB in the end (delta: 117.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:18:58,673 INFO L158 Benchmark]: CACSL2BoogieTranslator took 724.13ms. Allocated memory is still 121.6MB. Free memory was 89.1MB in the beginning and 81.6MB in the end (delta: 7.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:18:58,675 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 121.6MB. Free memory was 77.7MB in the beginning and 77.6MB in the end (delta: 117.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 724.13ms. Allocated memory is still 121.6MB. Free memory was 89.1MB in the beginning and 81.6MB in the end (delta: 7.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/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 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:19:01,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:19:01,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:19:01,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:19:01,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:19:01,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:19:01,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:19:01,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:19:01,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:19:01,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:19:01,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:19:01,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:19:01,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:19:01,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:19:01,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:19:01,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:19:01,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:19:01,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:19:01,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:19:01,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:19:01,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:19:01,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:19:01,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:19:01,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:19:01,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:19:01,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:19:01,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:19:01,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:19:01,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:19:01,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:19:01,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:19:01,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:19:01,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:19:01,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:19:01,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:19:01,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:19:01,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:19:01,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:19:01,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:19:01,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:19:01,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:19:01,130 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:19:01,158 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:19:01,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:19:01,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:19:01,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:19:01,160 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:19:01,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:19:01,161 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:19:01,161 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:19:01,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:19:01,161 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:19:01,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:19:01,162 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:19:01,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:19:01,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:19:01,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:19:01,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:19:01,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:19:01,164 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:19:01,164 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:19:01,164 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:19:01,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:19:01,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:19:01,165 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:19:01,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:19:01,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:19:01,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:19:01,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:19:01,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:19:01,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:19:01,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:19:01,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:19:01,168 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:19:01,168 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:19:01,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:19:01,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:19:01,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:19:01,169 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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 [2021-11-12 22:19:01,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:19:01,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:19:01,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:19:01,596 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:19:01,597 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:19:01,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-12 22:19:01,699 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/data/42efe0fa2/86772b764104454782543d98134c0646/FLAG22ace922b [2021-11-12 22:19:02,580 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:19:02,586 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-12 22:19:02,624 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/data/42efe0fa2/86772b764104454782543d98134c0646/FLAG22ace922b [2021-11-12 22:19:02,661 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/data/42efe0fa2/86772b764104454782543d98134c0646 [2021-11-12 22:19:02,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:19:02,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:19:02,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:19:02,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:19:02,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:19:02,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:19:02" (1/1) ... [2021-11-12 22:19:02,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b487381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:02, skipping insertion in model container [2021-11-12 22:19:02,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:19:02" (1/1) ... [2021-11-12 22:19:02,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:19:02,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:19:03,299 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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-12 22:19:03,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:19:03,593 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:19:03,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:19:03,695 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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-12 22:19:03,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:19:03,830 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:19:03,880 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_9da6a0ea-936f-4a70-a62c-86dc481b0d36/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-12 22:19:03,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:19:04,044 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:19:04,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04 WrapperNode [2021-11-12 22:19:04,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:19:04,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:19:04,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:19:04,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:19:04,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04" (1/1) ... [2021-11-12 22:19:04,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04" (1/1) ... [2021-11-12 22:19:04,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:19:04,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:19:04,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:19:04,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:19:04,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04" (1/1) ... [2021-11-12 22:19:04,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04" (1/1) ... [2021-11-12 22:19:04,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04" (1/1) ... [2021-11-12 22:19:04,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04" (1/1) ... [2021-11-12 22:19:04,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04" (1/1) ... [2021-11-12 22:19:04,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04" (1/1) ... [2021-11-12 22:19:04,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04" (1/1) ... [2021-11-12 22:19:04,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:19:04,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:19:04,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:19:04,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:19:04,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04" (1/1) ... [2021-11-12 22:19:04,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:19:04,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:19:04,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:19:04,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:19:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:19:04,391 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:19:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:19:04,392 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:19:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:19:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:19:04,392 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:19:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:19:04,393 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:19:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:19:04,393 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:19:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:19:04,394 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:19:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:19:04,394 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:19:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:19:04,394 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:19:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 22:19:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 22:19:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:19:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:19:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:19:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:19:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:19:04,396 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:19:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:19:04,396 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:19:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:19:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:19:04,397 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:19:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:19:04,397 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:19:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:19:04,397 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:19:04,398 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:19:04,398 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:19:04,398 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:19:04,398 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:19:04,398 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:19:04,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:19:04,399 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:19:04,399 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:19:04,399 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:19:04,399 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:19:04,399 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:19:04,400 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:19:04,400 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:19:04,400 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:19:04,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:19:04,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:19:04,400 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:19:04,401 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:19:08,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:19:08,569 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:19:08,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:19:08 BoogieIcfgContainer [2021-11-12 22:19:08,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:19:08,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:19:08,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:19:08,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:19:08,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:19:02" (1/3) ... [2021-11-12 22:19:08,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704cc1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:19:08, skipping insertion in model container [2021-11-12 22:19:08,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:19:04" (2/3) ... [2021-11-12 22:19:08,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704cc1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:19:08, skipping insertion in model container [2021-11-12 22:19:08,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:19:08" (3/3) ... [2021-11-12 22:19:08,580 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product27.cil.c [2021-11-12 22:19:08,586 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:19:08,586 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:19:08,643 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:19:08,651 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 22:19:08,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:19:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 569 states, 447 states have (on average 1.691275167785235) internal successors, (756), 468 states have internal predecessors, (756), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:19:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 22:19:08,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:08,724 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:19:08,724 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:08,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:08,731 INFO L85 PathProgramCache]: Analyzing trace with hash -289934377, now seen corresponding path program 1 times [2021-11-12 22:19:08,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:08,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723639442] [2021-11-12 22:19:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:08,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:08,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:08,760 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:08,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:19:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:09,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:19:09,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:09,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:10,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:10,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723639442] [2021-11-12 22:19:10,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723639442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:10,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:10,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:19:10,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398958048] [2021-11-12 22:19:10,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:10,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:19:10,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:10,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:19:10,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:19:10,225 INFO L87 Difference]: Start difference. First operand has 569 states, 447 states have (on average 1.691275167785235) internal successors, (756), 468 states have internal predecessors, (756), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-12 22:19:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:10,361 INFO L93 Difference]: Finished difference Result 590 states and 978 transitions. [2021-11-12 22:19:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:19:10,364 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 102 [2021-11-12 22:19:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:10,393 INFO L225 Difference]: With dead ends: 590 [2021-11-12 22:19:10,394 INFO L226 Difference]: Without dead ends: 561 [2021-11-12 22:19:10,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 202 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 22:19:10,405 INFO L933 BasicCegarLoop]: 939 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, 939 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:10,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 14.29ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:19:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-12 22:19:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-12 22:19:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 441 states have (on average 1.689342403628118) internal successors, (745), 460 states have internal predecessors, (745), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:19:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 932 transitions. [2021-11-12 22:19:10,587 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 932 transitions. Word has length 102 [2021-11-12 22:19:10,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:10,590 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 932 transitions. [2021-11-12 22:19:10,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-12 22:19:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 932 transitions. [2021-11-12 22:19:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 22:19:10,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:10,610 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:19:10,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:10,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:10,829 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2089053099, now seen corresponding path program 1 times [2021-11-12 22:19:10,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:10,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930213803] [2021-11-12 22:19:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:10,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:10,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:10,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:10,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:19:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:11,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:11,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:11,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:12,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:12,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930213803] [2021-11-12 22:19:12,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930213803] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:12,152 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:12,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:19:12,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403042013] [2021-11-12 22:19:12,153 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:12,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:19:12,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:12,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:19:12,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:12,163 INFO L87 Difference]: Start difference. First operand 561 states and 932 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 22:19:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:12,336 INFO L93 Difference]: Finished difference Result 1106 states and 1842 transitions. [2021-11-12 22:19:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:19:12,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 104 [2021-11-12 22:19:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:12,346 INFO L225 Difference]: With dead ends: 1106 [2021-11-12 22:19:12,347 INFO L226 Difference]: Without dead ends: 561 [2021-11-12 22:19:12,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:19:12,358 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 25 mSDsluCounter, 1834 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2753 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.28ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:12,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 2753 Invalid, 34 Unknown, 0 Unchecked, 21.28ms Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 43.14ms Time] [2021-11-12 22:19:12,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-12 22:19:12,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-12 22:19:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 441 states have (on average 1.6757369614512472) internal successors, (739), 460 states have internal predecessors, (739), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:19:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 926 transitions. [2021-11-12 22:19:12,412 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 926 transitions. Word has length 104 [2021-11-12 22:19:12,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:12,414 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 926 transitions. [2021-11-12 22:19:12,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 22:19:12,415 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 926 transitions. [2021-11-12 22:19:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 22:19:12,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:12,427 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:19:12,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:12,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:12,648 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:12,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1236640105, now seen corresponding path program 1 times [2021-11-12 22:19:12,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:12,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621719887] [2021-11-12 22:19:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:12,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:12,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:12,652 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:12,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:19:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:13,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:13,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:13,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:13,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:13,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621719887] [2021-11-12 22:19:13,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621719887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:13,956 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:13,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:19:13,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236209744] [2021-11-12 22:19:13,957 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:13,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:19:13,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:13,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:19:13,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:19:13,963 INFO L87 Difference]: Start difference. First operand 561 states and 926 transitions. Second operand has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:19:14,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:14,251 INFO L93 Difference]: Finished difference Result 1064 states and 1759 transitions. [2021-11-12 22:19:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:19:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 109 [2021-11-12 22:19:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:14,269 INFO L225 Difference]: With dead ends: 1064 [2021-11-12 22:19:14,270 INFO L226 Difference]: Without dead ends: 555 [2021-11-12 22:19:14,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 207 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 22:19:14,275 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 117 mSDsluCounter, 8045 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 8958 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:14,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 8958 Invalid, 109 Unknown, 0 Unchecked, 33.93ms Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 142.98ms Time] [2021-11-12 22:19:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-12 22:19:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-12 22:19:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 435 states have (on average 1.6689655172413793) internal successors, (726), 454 states have internal predecessors, (726), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:19:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 913 transitions. [2021-11-12 22:19:14,325 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 913 transitions. Word has length 109 [2021-11-12 22:19:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:14,326 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 913 transitions. [2021-11-12 22:19:14,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:19:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 913 transitions. [2021-11-12 22:19:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-12 22:19:14,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:14,339 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:19:14,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:14,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:14,558 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:14,559 INFO L85 PathProgramCache]: Analyzing trace with hash -338982854, now seen corresponding path program 1 times [2021-11-12 22:19:14,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:14,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012825896] [2021-11-12 22:19:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:14,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:14,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:14,562 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:14,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:19:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:15,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:15,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:15,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:15,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:15,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012825896] [2021-11-12 22:19:15,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012825896] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:15,813 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:15,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:19:15,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357558292] [2021-11-12 22:19:15,814 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:15,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:19:15,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:15,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:19:15,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:15,816 INFO L87 Difference]: Start difference. First operand 555 states and 913 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:19:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:16,065 INFO L93 Difference]: Finished difference Result 1067 states and 1760 transitions. [2021-11-12 22:19:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:19:16,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 110 [2021-11-12 22:19:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:16,073 INFO L225 Difference]: With dead ends: 1067 [2021-11-12 22:19:16,073 INFO L226 Difference]: Without dead ends: 555 [2021-11-12 22:19:16,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:19:16,079 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 112 mSDsluCounter, 3404 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 4268 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.52ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 169.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:16,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 4268 Invalid, 150 Unknown, 0 Unchecked, 11.52ms Time], IncrementalHoareTripleChecker [23 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 169.69ms Time] [2021-11-12 22:19:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-12 22:19:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-12 22:19:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 435 states have (on average 1.6137931034482758) internal successors, (702), 454 states have internal predecessors, (702), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:19:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 889 transitions. [2021-11-12 22:19:16,113 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 889 transitions. Word has length 110 [2021-11-12 22:19:16,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:16,114 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 889 transitions. [2021-11-12 22:19:16,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:19:16,114 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 889 transitions. [2021-11-12 22:19:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 22:19:16,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:16,119 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:19:16,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:16,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:16,334 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:16,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:16,335 INFO L85 PathProgramCache]: Analyzing trace with hash -359403905, now seen corresponding path program 1 times [2021-11-12 22:19:16,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:16,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784905718] [2021-11-12 22:19:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:16,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:16,338 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:16,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:19:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:16,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:16,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:17,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:17,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:17,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784905718] [2021-11-12 22:19:17,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784905718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:17,628 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:17,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:19:17,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834968756] [2021-11-12 22:19:17,628 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:17,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:19:17,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:17,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:19:17,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:19:17,630 INFO L87 Difference]: Start difference. First operand 555 states and 889 transitions. Second operand has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:19:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:17,790 INFO L93 Difference]: Finished difference Result 1058 states and 1722 transitions. [2021-11-12 22:19:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:19:17,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 112 [2021-11-12 22:19:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:17,799 INFO L225 Difference]: With dead ends: 1058 [2021-11-12 22:19:17,799 INFO L226 Difference]: Without dead ends: 534 [2021-11-12 22:19:17,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 216 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 22:19:17,805 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 117 mSDsluCounter, 4322 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5199 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.50ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:17,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 5199 Invalid, 57 Unknown, 0 Unchecked, 12.50ms Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 88.69ms Time] [2021-11-12 22:19:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-12 22:19:17,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-12 22:19:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 414 states have (on average 1.6352657004830917) internal successors, (677), 433 states have internal predecessors, (677), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:19:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 864 transitions. [2021-11-12 22:19:17,837 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 864 transitions. Word has length 112 [2021-11-12 22:19:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:17,837 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 864 transitions. [2021-11-12 22:19:17,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:19:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 864 transitions. [2021-11-12 22:19:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 22:19:17,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:17,843 INFO L514 BasicCegarLoop]: trace histogram [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 22:19:17,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:18,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:18,062 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1853815862, now seen corresponding path program 1 times [2021-11-12 22:19:18,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:18,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851069910] [2021-11-12 22:19:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:18,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:18,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:18,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:18,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:19:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:18,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:19:18,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:18,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:19,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:19,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851069910] [2021-11-12 22:19:19,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851069910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:19,442 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:19,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:19:19,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657588251] [2021-11-12 22:19:19,443 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:19,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:19:19,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:19,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:19:19,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:19:19,444 INFO L87 Difference]: Start difference. First operand 534 states and 864 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:19:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:19,673 INFO L93 Difference]: Finished difference Result 1031 states and 1686 transitions. [2021-11-12 22:19:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:19:19,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 115 [2021-11-12 22:19:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:19,681 INFO L225 Difference]: With dead ends: 1031 [2021-11-12 22:19:19,682 INFO L226 Difference]: Without dead ends: 534 [2021-11-12 22:19:19,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:19:19,692 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 31 mSDsluCounter, 5918 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 6767 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:19,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 6767 Invalid, 91 Unknown, 0 Unchecked, 22.60ms Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 109.66ms Time] [2021-11-12 22:19:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-12 22:19:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-12 22:19:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 414 states have (on average 1.6328502415458936) internal successors, (676), 433 states have internal predecessors, (676), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:19:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 863 transitions. [2021-11-12 22:19:19,727 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 863 transitions. Word has length 115 [2021-11-12 22:19:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:19,727 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 863 transitions. [2021-11-12 22:19:19,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:19:19,728 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 863 transitions. [2021-11-12 22:19:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:19:19,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:19,733 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:19:19,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:19,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:19,953 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:19,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1773056601, now seen corresponding path program 1 times [2021-11-12 22:19:19,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:19,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36820959] [2021-11-12 22:19:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:19,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:19,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:19,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:19,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:19:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:19:20,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:19:20,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:19:21,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:21,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36820959] [2021-11-12 22:19:21,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36820959] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:21,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:21,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:19:21,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120726922] [2021-11-12 22:19:21,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:21,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:19:21,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:21,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:19:21,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:19:21,424 INFO L87 Difference]: Start difference. First operand 534 states and 863 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:19:23,450 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 22:19:25,456 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 22:19:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:26,517 INFO L93 Difference]: Finished difference Result 1027 states and 1703 transitions. [2021-11-12 22:19:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:19:26,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 116 [2021-11-12 22:19:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:26,524 INFO L225 Difference]: With dead ends: 1027 [2021-11-12 22:19:26,525 INFO L226 Difference]: Without dead ends: 538 [2021-11-12 22:19:26,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 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 22:19:26,530 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 811 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4853.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.60ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4995.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:26,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 2154 Invalid, 437 Unknown, 0 Unchecked, 13.60ms Time], IncrementalHoareTripleChecker [16 Valid, 419 Invalid, 2 Unknown, 0 Unchecked, 4995.01ms Time] [2021-11-12 22:19:26,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-12 22:19:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-12 22:19:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 417 states have (on average 1.6282973621103118) internal successors, (679), 436 states have internal predecessors, (679), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (92), 89 states have call predecessors, (92), 91 states have call successors, (92) [2021-11-12 22:19:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 867 transitions. [2021-11-12 22:19:26,570 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 867 transitions. Word has length 116 [2021-11-12 22:19:26,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:26,571 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 867 transitions. [2021-11-12 22:19:26,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:19:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 867 transitions. [2021-11-12 22:19:26,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:19:26,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:26,577 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:19:26,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:26,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:26,794 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:26,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:26,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1773368063, now seen corresponding path program 1 times [2021-11-12 22:19:26,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:26,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699583339] [2021-11-12 22:19:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:26,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:26,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:26,796 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:26,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:19:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:27,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:19:27,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:19:27,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:19:28,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:28,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699583339] [2021-11-12 22:19:28,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699583339] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:28,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:28,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:19:28,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976950793] [2021-11-12 22:19:28,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:28,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:19:28,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:28,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:19:28,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:19:28,149 INFO L87 Difference]: Start difference. First operand 538 states and 867 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:19:30,179 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 22:19:32,185 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 22:19:33,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:33,208 INFO L93 Difference]: Finished difference Result 1036 states and 1710 transitions. [2021-11-12 22:19:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:19:33,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-11-12 22:19:33,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:33,215 INFO L225 Difference]: With dead ends: 1036 [2021-11-12 22:19:33,215 INFO L226 Difference]: Without dead ends: 543 [2021-11-12 22:19:33,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 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 22:19:33,220 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 812 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4837.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.71ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4975.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:33,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 2155 Invalid, 439 Unknown, 0 Unchecked, 10.71ms Time], IncrementalHoareTripleChecker [14 Valid, 423 Invalid, 2 Unknown, 0 Unchecked, 4975.30ms Time] [2021-11-12 22:19:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-12 22:19:33,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2021-11-12 22:19:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 421 states have (on average 1.6223277909738718) internal successors, (683), 440 states have internal predecessors, (683), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (93), 89 states have call predecessors, (93), 91 states have call successors, (93) [2021-11-12 22:19:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 872 transitions. [2021-11-12 22:19:33,279 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 872 transitions. Word has length 118 [2021-11-12 22:19:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:33,279 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 872 transitions. [2021-11-12 22:19:33,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:19:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 872 transitions. [2021-11-12 22:19:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:19:33,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:33,284 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:19:33,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:33,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:33,504 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:33,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1378780391, now seen corresponding path program 1 times [2021-11-12 22:19:33,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:33,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691582602] [2021-11-12 22:19:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:33,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:33,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:33,506 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:33,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:19:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:33,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:19:33,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:19:34,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:19:34,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:34,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691582602] [2021-11-12 22:19:34,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691582602] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:34,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:34,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:19:34,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413602493] [2021-11-12 22:19:34,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:34,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:19:34,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:34,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:19:34,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:19:34,954 INFO L87 Difference]: Start difference. First operand 543 states and 872 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:19:37,027 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 22:19:39,034 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 22:19:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:40,053 INFO L93 Difference]: Finished difference Result 1047 states and 1719 transitions. [2021-11-12 22:19:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:19:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-12 22:19:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:40,061 INFO L225 Difference]: With dead ends: 1047 [2021-11-12 22:19:40,062 INFO L226 Difference]: Without dead ends: 549 [2021-11-12 22:19:40,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 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 22:19:40,067 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 812 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4837.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.59ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4966.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:40,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 2155 Invalid, 438 Unknown, 0 Unchecked, 10.59ms Time], IncrementalHoareTripleChecker [12 Valid, 424 Invalid, 2 Unknown, 0 Unchecked, 4966.13ms Time] [2021-11-12 22:19:40,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-12 22:19:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-12 22:19:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 426 states have (on average 1.6150234741784038) internal successors, (688), 445 states have internal predecessors, (688), 96 states have call successors, (96), 27 states have call predecessors, (96), 26 states have return successors, (94), 89 states have call predecessors, (94), 91 states have call successors, (94) [2021-11-12 22:19:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 878 transitions. [2021-11-12 22:19:40,098 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 878 transitions. Word has length 120 [2021-11-12 22:19:40,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:40,098 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 878 transitions. [2021-11-12 22:19:40,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:19:40,099 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 878 transitions. [2021-11-12 22:19:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 22:19:40,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:40,103 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:19:40,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:40,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:40,318 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:40,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:40,318 INFO L85 PathProgramCache]: Analyzing trace with hash -195960905, now seen corresponding path program 1 times [2021-11-12 22:19:40,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:40,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701757501] [2021-11-12 22:19:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:40,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:40,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:40,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:40,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:19:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:40,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:19:40,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:19:41,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:19:41,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:41,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701757501] [2021-11-12 22:19:41,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701757501] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:41,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:41,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:19:41,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690405531] [2021-11-12 22:19:41,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:41,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:19:41,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:41,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:19:41,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:19:41,726 INFO L87 Difference]: Start difference. First operand 549 states and 878 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:19:43,749 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 22:19:45,755 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 22:19:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:46,698 INFO L93 Difference]: Finished difference Result 1060 states and 1730 transitions. [2021-11-12 22:19:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:19:46,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 122 [2021-11-12 22:19:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:46,705 INFO L225 Difference]: With dead ends: 1060 [2021-11-12 22:19:46,705 INFO L226 Difference]: Without dead ends: 556 [2021-11-12 22:19:46,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 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 22:19:46,710 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 804 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4769.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.26ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4897.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:46,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 2155 Invalid, 437 Unknown, 0 Unchecked, 9.26ms Time], IncrementalHoareTripleChecker [10 Valid, 425 Invalid, 2 Unknown, 0 Unchecked, 4897.14ms Time] [2021-11-12 22:19:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-12 22:19:46,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2021-11-12 22:19:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 432 states have (on average 1.6064814814814814) internal successors, (694), 451 states have internal predecessors, (694), 96 states have call successors, (96), 28 states have call predecessors, (96), 27 states have return successors, (95), 89 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-12 22:19:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 885 transitions. [2021-11-12 22:19:46,740 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 885 transitions. Word has length 122 [2021-11-12 22:19:46,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:46,740 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 885 transitions. [2021-11-12 22:19:46,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:19:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 885 transitions. [2021-11-12 22:19:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 22:19:46,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:46,746 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:19:46,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:46,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:46,967 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:46,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1421832665, now seen corresponding path program 1 times [2021-11-12 22:19:46,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:46,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973561814] [2021-11-12 22:19:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:46,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:46,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:46,969 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:46,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:19:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:47,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:19:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:19:48,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:19:49,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:49,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973561814] [2021-11-12 22:19:49,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973561814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:19:49,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1311815919] [2021-11-12 22:19:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:49,265 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:19:49,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:19:49,269 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:19:49,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:19:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:49,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:19:49,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:19:50,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:19:50,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1311815919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:50,498 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:19:50,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:19:50,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246254957] [2021-11-12 22:19:50,499 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:50,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:19:50,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:19:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:19:50,501 INFO L87 Difference]: Start difference. First operand 556 states and 885 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 22:19:52,539 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 22:19:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:55,171 INFO L93 Difference]: Finished difference Result 1711 states and 2808 transitions. [2021-11-12 22:19:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:19:55,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 124 [2021-11-12 22:19:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:55,186 INFO L225 Difference]: With dead ends: 1711 [2021-11-12 22:19:55,186 INFO L226 Difference]: Without dead ends: 1200 [2021-11-12 22:19:55,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 474 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 22:19:55,191 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 1908 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 424 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4110.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.45ms SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4516.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:55,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1986 Valid, 1582 Invalid, 1378 Unknown, 0 Unchecked, 21.45ms Time], IncrementalHoareTripleChecker [424 Valid, 953 Invalid, 1 Unknown, 0 Unchecked, 4516.58ms Time] [2021-11-12 22:19:55,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-11-12 22:19:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1141. [2021-11-12 22:19:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 873 states have (on average 1.6231386025200458) internal successors, (1417), 912 states have internal predecessors, (1417), 214 states have call successors, (214), 51 states have call predecessors, (214), 53 states have return successors, (239), 208 states have call predecessors, (239), 209 states have call successors, (239) [2021-11-12 22:19:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1870 transitions. [2021-11-12 22:19:55,265 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1870 transitions. Word has length 124 [2021-11-12 22:19:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:55,266 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 1870 transitions. [2021-11-12 22:19:55,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 22:19:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1870 transitions. [2021-11-12 22:19:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 22:19:55,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:55,272 INFO L514 BasicCegarLoop]: trace histogram [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 22:19:55,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:55,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:55,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:55,676 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1127001264, now seen corresponding path program 1 times [2021-11-12 22:19:55,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:55,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231381359] [2021-11-12 22:19:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:55,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:55,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:55,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:55,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:19:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:56,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:19:56,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:19:56,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:19:57,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:57,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231381359] [2021-11-12 22:19:57,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231381359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:19:57,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [95603048] [2021-11-12 22:19:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:57,819 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:19:57,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:19:57,819 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:19:57,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:19:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:58,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:19:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:19:58,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:19:58,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [95603048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:58,979 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:19:58,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:19:58,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963039138] [2021-11-12 22:19:58,980 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:58,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:19:58,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:58,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:19:58,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:19:58,982 INFO L87 Difference]: Start difference. First operand 1141 states and 1870 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 22:20:01,011 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 22:20:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:03,385 INFO L93 Difference]: Finished difference Result 3684 states and 6210 transitions. [2021-11-12 22:20:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:20:03,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 125 [2021-11-12 22:20:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:03,410 INFO L225 Difference]: With dead ends: 3684 [2021-11-12 22:20:03,411 INFO L226 Difference]: Without dead ends: 2588 [2021-11-12 22:20:03,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 478 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 22:20:03,419 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 1916 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 429 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3834.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.39ms SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4198.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:03,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1993 Valid, 1524 Invalid, 1380 Unknown, 0 Unchecked, 15.39ms Time], IncrementalHoareTripleChecker [429 Valid, 950 Invalid, 1 Unknown, 0 Unchecked, 4198.38ms Time] [2021-11-12 22:20:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-11-12 22:20:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2463. [2021-11-12 22:20:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 1846 states have (on average 1.6267605633802817) internal successors, (3003), 1935 states have internal predecessors, (3003), 508 states have call successors, (508), 97 states have call predecessors, (508), 108 states have return successors, (642), 506 states have call predecessors, (642), 503 states have call successors, (642) [2021-11-12 22:20:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 4153 transitions. [2021-11-12 22:20:03,587 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 4153 transitions. Word has length 125 [2021-11-12 22:20:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:03,588 INFO L470 AbstractCegarLoop]: Abstraction has 2463 states and 4153 transitions. [2021-11-12 22:20:03,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 22:20:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 4153 transitions. [2021-11-12 22:20:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:20:03,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:03,594 INFO L514 BasicCegarLoop]: trace histogram [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 22:20:03,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:03,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:03,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:03,997 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash 577166331, now seen corresponding path program 1 times [2021-11-12 22:20:03,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:03,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379520872] [2021-11-12 22:20:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:03,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:03,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:04,000 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:04,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:20:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:20:04,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:20:04,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:20:06,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:06,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379520872] [2021-11-12 22:20:06,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379520872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:20:06,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [719982686] [2021-11-12 22:20:06,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:06,027 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:20:06,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:20:06,028 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:20:06,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:20:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:06,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:20:06,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:20:06,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:20:07,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [719982686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:07,356 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:20:07,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:20:07,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412308987] [2021-11-12 22:20:07,357 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:07,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:20:07,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:20:07,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:20:07,360 INFO L87 Difference]: Start difference. First operand 2463 states and 4153 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 22:20:09,392 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 22:20:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:12,233 INFO L93 Difference]: Finished difference Result 8206 states and 14330 transitions. [2021-11-12 22:20:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:20:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 126 [2021-11-12 22:20:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:12,346 INFO L225 Difference]: With dead ends: 8206 [2021-11-12 22:20:12,347 INFO L226 Difference]: Without dead ends: 5788 [2021-11-12 22:20:12,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 482 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 22:20:12,364 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 2496 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 599 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4112.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2572 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.37ms SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4494.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:12,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2572 Valid, 1409 Invalid, 1492 Unknown, 0 Unchecked, 19.37ms Time], IncrementalHoareTripleChecker [599 Valid, 892 Invalid, 1 Unknown, 0 Unchecked, 4494.41ms Time] [2021-11-12 22:20:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5788 states. [2021-11-12 22:20:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5788 to 5531. [2021-11-12 22:20:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5531 states, 4046 states have (on average 1.6220958971824024) internal successors, (6563), 4262 states have internal predecessors, (6563), 1258 states have call successors, (1258), 189 states have call predecessors, (1258), 226 states have return successors, (1821), 1270 states have call predecessors, (1821), 1253 states have call successors, (1821) [2021-11-12 22:20:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5531 states to 5531 states and 9642 transitions. [2021-11-12 22:20:12,860 INFO L78 Accepts]: Start accepts. Automaton has 5531 states and 9642 transitions. Word has length 126 [2021-11-12 22:20:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:12,861 INFO L470 AbstractCegarLoop]: Abstraction has 5531 states and 9642 transitions. [2021-11-12 22:20:12,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 22:20:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5531 states and 9642 transitions. [2021-11-12 22:20:12,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:20:12,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:12,868 INFO L514 BasicCegarLoop]: trace histogram [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 22:20:12,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:13,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:13,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:20:13,282 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:13,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:13,282 INFO L85 PathProgramCache]: Analyzing trace with hash 712156498, now seen corresponding path program 1 times [2021-11-12 22:20:13,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:13,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260872686] [2021-11-12 22:20:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:13,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:13,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:13,284 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:13,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:20:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:20:13,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:20:14,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:20:15,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:15,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260872686] [2021-11-12 22:20:15,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260872686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:20:15,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [613591095] [2021-11-12 22:20:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:15,125 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:20:15,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:20:15,142 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:20:15,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 22:20:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:15,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:20:15,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:20:15,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:20:16,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [613591095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:16,337 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:20:16,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:20:16,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125440812] [2021-11-12 22:20:16,338 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:16,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:20:16,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:20:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:20:16,339 INFO L87 Difference]: Start difference. First operand 5531 states and 9642 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 22:20:18,362 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 22:20:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:21,258 INFO L93 Difference]: Finished difference Result 18834 states and 34626 transitions. [2021-11-12 22:20:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:20:21,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 127 [2021-11-12 22:20:21,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:21,414 INFO L225 Difference]: With dead ends: 18834 [2021-11-12 22:20:21,414 INFO L226 Difference]: Without dead ends: 13348 [2021-11-12 22:20:21,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 486 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 22:20:21,455 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 2488 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 603 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3835.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2563 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.71ms SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4185.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:21,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2563 Valid, 1411 Invalid, 1494 Unknown, 0 Unchecked, 14.71ms Time], IncrementalHoareTripleChecker [603 Valid, 890 Invalid, 1 Unknown, 0 Unchecked, 4185.72ms Time] [2021-11-12 22:20:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13348 states. [2021-11-12 22:20:22,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13348 to 12855. [2021-11-12 22:20:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12855 states, 9162 states have (on average 1.6122025758568) internal successors, (14771), 9705 states have internal predecessors, (14771), 3208 states have call successors, (3208), 373 states have call predecessors, (3208), 484 states have return successors, (5418), 3266 states have call predecessors, (5418), 3203 states have call successors, (5418) [2021-11-12 22:20:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12855 states to 12855 states and 23397 transitions. [2021-11-12 22:20:22,738 INFO L78 Accepts]: Start accepts. Automaton has 12855 states and 23397 transitions. Word has length 127 [2021-11-12 22:20:22,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:22,738 INFO L470 AbstractCegarLoop]: Abstraction has 12855 states and 23397 transitions. [2021-11-12 22:20:22,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 22:20:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 12855 states and 23397 transitions. [2021-11-12 22:20:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:20:22,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:22,744 INFO L514 BasicCegarLoop]: trace histogram [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 22:20:22,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:22,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:23,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:23,149 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash 601888285, now seen corresponding path program 1 times [2021-11-12 22:20:23,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:23,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547966415] [2021-11-12 22:20:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:23,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:23,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:23,152 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:23,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:20:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:20:23,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:20:24,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:20:25,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:25,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547966415] [2021-11-12 22:20:25,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547966415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:20:25,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [126285453] [2021-11-12 22:20:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:25,092 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:20:25,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:20:25,093 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:20:25,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 22:20:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:25,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:20:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:20:25,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:20:26,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [126285453] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:26,332 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:20:26,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:20:26,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213714677] [2021-11-12 22:20:26,333 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:26,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:20:26,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:26,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:20:26,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:20:26,334 INFO L87 Difference]: Start difference. First operand 12855 states and 23397 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 22:20:28,365 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 22:20:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:32,123 INFO L93 Difference]: Finished difference Result 44435 states and 88331 transitions. [2021-11-12 22:20:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:20:32,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 128 [2021-11-12 22:20:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:32,443 INFO L225 Difference]: With dead ends: 44435 [2021-11-12 22:20:32,443 INFO L226 Difference]: Without dead ends: 31615 [2021-11-12 22:20:32,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 490 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 22:20:32,551 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 1923 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 445 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3910.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.38ms SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4252.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:32,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1997 Valid, 1467 Invalid, 1345 Unknown, 0 Unchecked, 13.38ms Time], IncrementalHoareTripleChecker [445 Valid, 899 Invalid, 1 Unknown, 0 Unchecked, 4252.68ms Time] [2021-11-12 22:20:32,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31615 states. [2021-11-12 22:20:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31615 to 30824. [2021-11-12 22:20:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30824 states, 21413 states have (on average 1.5989819268668566) internal successors, (34239), 22807 states have internal predecessors, (34239), 8350 states have call successors, (8350), 740 states have call predecessors, (8350), 1060 states have return successors, (16892), 8553 states have call predecessors, (16892), 8345 states have call successors, (16892) [2021-11-12 22:20:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30824 states to 30824 states and 59481 transitions. [2021-11-12 22:20:35,642 INFO L78 Accepts]: Start accepts. Automaton has 30824 states and 59481 transitions. Word has length 128 [2021-11-12 22:20:35,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:35,643 INFO L470 AbstractCegarLoop]: Abstraction has 30824 states and 59481 transitions. [2021-11-12 22:20:35,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 22:20:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 30824 states and 59481 transitions. [2021-11-12 22:20:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 22:20:35,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:35,679 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:20:35,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:35,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:36,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:20:36,101 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:36,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:36,102 INFO L85 PathProgramCache]: Analyzing trace with hash 499651806, now seen corresponding path program 1 times [2021-11-12 22:20:36,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:36,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401268142] [2021-11-12 22:20:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:36,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:36,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:36,105 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:36,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:20:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:36,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:20:36,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:20:37,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:20:38,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:38,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401268142] [2021-11-12 22:20:38,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401268142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:38,182 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:20:38,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-12 22:20:38,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437739971] [2021-11-12 22:20:38,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:38,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:20:38,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:20:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:20:38,184 INFO L87 Difference]: Start difference. First operand 30824 states and 59481 transitions. Second operand has 16 states, 16 states have (on average 9.0625) internal successors, (145), 12 states have internal predecessors, (145), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-12 22:20:40,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:20:42,212 WARN L515 Checker$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 22:20:44,218 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:20:46,224 WARN L515 Checker$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 22:21:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:13,776 INFO L93 Difference]: Finished difference Result 194655 states and 430111 transitions. [2021-11-12 22:21:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-12 22:21:13,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.0625) internal successors, (145), 12 states have internal predecessors, (145), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) Word has length 190 [2021-11-12 22:21:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:16,310 INFO L225 Difference]: With dead ends: 194655 [2021-11-12 22:21:16,311 INFO L226 Difference]: Without dead ends: 163876 [2021-11-12 22:21:17,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 22:21:17,110 INFO L933 BasicCegarLoop]: 1803 mSDtfsCounter, 6065 mSDsluCounter, 6151 mSDsCounter, 0 mSdLazyCounter, 12379 mSolverCounterSat, 2494 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20683.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6101 SdHoareTripleChecker+Valid, 7954 SdHoareTripleChecker+Invalid, 14877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 88.24ms SdHoareTripleChecker+Time, 2494 IncrementalHoareTripleChecker+Valid, 12379 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22627.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:17,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6101 Valid, 7954 Invalid, 14877 Unknown, 0 Unchecked, 88.24ms Time], IncrementalHoareTripleChecker [2494 Valid, 12379 Invalid, 4 Unknown, 0 Unchecked, 22627.38ms Time] [2021-11-12 22:21:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163876 states. [2021-11-12 22:21:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163876 to 127116. [2021-11-12 22:21:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127116 states, 84684 states have (on average 1.5775471163383874) internal successors, (133593), 90962 states have internal predecessors, (133593), 38544 states have call successors, (38544), 2211 states have call predecessors, (38544), 3887 states have return successors, (96632), 39815 states have call predecessors, (96632), 38539 states have call successors, (96632) [2021-11-12 22:21:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127116 states to 127116 states and 268769 transitions. [2021-11-12 22:21:32,192 INFO L78 Accepts]: Start accepts. Automaton has 127116 states and 268769 transitions. Word has length 190 [2021-11-12 22:21:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:32,193 INFO L470 AbstractCegarLoop]: Abstraction has 127116 states and 268769 transitions. [2021-11-12 22:21:32,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.0625) internal successors, (145), 12 states have internal predecessors, (145), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-12 22:21:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 127116 states and 268769 transitions. [2021-11-12 22:21:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-12 22:21:32,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:32,334 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:32,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:32,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:32,551 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:32,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:32,551 INFO L85 PathProgramCache]: Analyzing trace with hash -448501691, now seen corresponding path program 1 times [2021-11-12 22:21:32,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:32,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361321868] [2021-11-12 22:21:32,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:32,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:32,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:32,554 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:32,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9da6a0ea-936f-4a70-a62c-86dc481b0d36/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:21:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:21:33,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:21:34,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:21:34,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:34,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361321868] [2021-11-12 22:21:34,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361321868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:34,967 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:34,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 22:21:34,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19406015] [2021-11-12 22:21:34,967 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:34,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:21:34,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:34,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:21:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:21:34,969 INFO L87 Difference]: Start difference. First operand 127116 states and 268769 transitions. Second operand has 10 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-12 22:21:39,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:39,901 INFO L93 Difference]: Finished difference Result 157743 states and 327921 transitions. [2021-11-12 22:21:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:21:39,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 193 [2021-11-12 22:21:39,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:40,158 INFO L225 Difference]: With dead ends: 157743 [2021-11-12 22:21:40,158 INFO L226 Difference]: Without dead ends: 30661