./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/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 d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:44:56,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:44:56,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:44:56,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:44:56,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:44:56,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:44:56,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:44:56,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:44:56,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:44:56,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:44:56,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:44:56,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:44:56,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:44:56,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:44:56,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:44:56,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:44:56,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:44:56,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:44:56,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:44:56,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:44:56,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:44:56,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:44:56,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:44:56,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:44:56,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:44:56,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:44:56,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:44:56,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:44:56,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:44:56,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:44:56,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:44:56,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:44:56,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:44:56,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:44:56,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:44:56,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:44:56,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:44:56,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:44:56,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:44:56,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:44:56,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:44:56,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:44:56,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:44:56,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:44:56,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:44:56,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:44:56,658 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:44:56,658 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:44:56,658 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:44:56,658 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:44:56,665 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:44:56,665 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:44:56,666 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:44:56,667 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:44:56,667 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:44:56,667 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:44:56,667 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:44:56,668 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:44:56,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:44:56,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:44:56,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:44:56,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:44:56,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:44:56,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:44:56,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:44:56,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:44:56,670 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:44:56,670 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:44:56,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:44:56,671 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:44:56,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:44:56,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:44:56,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:44:56,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:44:56,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:44:56,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:44:56,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:44:56,674 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:44:56,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:44:56,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:44:56,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:44:56,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:44:56,675 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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f [2021-11-12 23:44:56,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:44:57,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:44:57,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:44:57,012 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:44:57,013 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:44:57,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-12 23:44:57,087 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/data/d891d7432/0c80e7add8b4442ea3ba0af07bfea37a/FLAG9faf34eca [2021-11-12 23:44:57,827 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:44:57,827 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-12 23:44:57,848 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/data/d891d7432/0c80e7add8b4442ea3ba0af07bfea37a/FLAG9faf34eca [2021-11-12 23:44:57,968 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/data/d891d7432/0c80e7add8b4442ea3ba0af07bfea37a [2021-11-12 23:44:57,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:44:57,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:44:57,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:44:57,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:44:57,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:44:57,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:44:57" (1/1) ... [2021-11-12 23:44:57,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476de770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:57, skipping insertion in model container [2021-11-12 23:44:57,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:44:57" (1/1) ... [2021-11-12 23:44:57,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:44:58,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:44:58,666 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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-12 23:44:58,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:44:58,749 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:44:58,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@14918c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:58, skipping insertion in model container [2021-11-12 23:44:58,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:44:58,750 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:44:58,751 INFO L158 Benchmark]: Toolchain (without parser) took 776.65ms. Allocated memory is still 92.3MB. Free memory was 67.5MB in the beginning and 51.6MB in the end (delta: 16.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:44:58,752 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory was 66.3MB in the beginning and 66.3MB in the end (delta: 49.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:44:58,753 INFO L158 Benchmark]: CACSL2BoogieTranslator took 771.74ms. Allocated memory is still 92.3MB. Free memory was 67.3MB in the beginning and 51.6MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:44:58,755 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory was 66.3MB in the beginning and 66.3MB in the end (delta: 49.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 771.74ms. Allocated memory is still 92.3MB. Free memory was 67.3MB in the beginning and 51.6MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3048]: 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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/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 d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:45:01,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:45:01,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:45:01,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:45:01,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:45:01,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:45:01,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:45:01,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:45:01,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:45:01,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:45:01,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:45:01,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:45:01,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:45:01,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:45:01,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:45:01,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:45:01,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:45:01,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:45:01,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:45:01,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:45:01,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:45:01,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:45:01,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:45:01,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:45:01,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:45:01,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:45:01,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:45:01,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:45:01,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:45:01,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:45:01,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:45:01,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:45:01,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:45:01,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:45:01,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:45:01,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:45:01,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:45:01,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:45:01,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:45:01,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:45:01,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:45:01,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:45:01,247 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:45:01,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:45:01,249 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:45:01,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:45:01,249 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:45:01,250 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:45:01,250 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:45:01,250 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:45:01,250 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:45:01,250 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:45:01,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:45:01,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:45:01,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:45:01,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:45:01,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:45:01,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:45:01,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:45:01,254 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:45:01,255 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:45:01,255 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:45:01,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:45:01,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:45:01,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:45:01,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:45:01,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:45:01,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:45:01,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:45:01,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:45:01,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:45:01,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:45:01,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:45:01,257 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:45:01,257 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:45:01,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:45:01,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:45:01,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:45:01,258 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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f [2021-11-12 23:45:01,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:45:01,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:45:01,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:45:01,691 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:45:01,693 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:45:01,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-12 23:45:01,780 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/data/120c73d0d/4d9e1b63695c4fc7b34022281b324acf/FLAGbd098f8c8 [2021-11-12 23:45:02,461 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:45:02,462 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-12 23:45:02,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/data/120c73d0d/4d9e1b63695c4fc7b34022281b324acf/FLAGbd098f8c8 [2021-11-12 23:45:02,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/data/120c73d0d/4d9e1b63695c4fc7b34022281b324acf [2021-11-12 23:45:02,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:45:02,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:45:02,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:45:02,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:45:02,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:45:02,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:45:02" (1/1) ... [2021-11-12 23:45:02,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0c26d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:02, skipping insertion in model container [2021-11-12 23:45:02,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:45:02" (1/1) ... [2021-11-12 23:45:02,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:45:02,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:45:03,324 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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-12 23:45:03,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:45:03,404 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:45:03,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:45:03,536 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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-12 23:45:03,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:45:03,555 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:45:03,687 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_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-12 23:45:03,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:45:03,742 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:45:03,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03 WrapperNode [2021-11-12 23:45:03,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:45:03,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:45:03,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:45:03,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:45:03,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03" (1/1) ... [2021-11-12 23:45:03,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03" (1/1) ... [2021-11-12 23:45:03,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:45:03,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:45:03,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:45:03,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:45:03,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03" (1/1) ... [2021-11-12 23:45:03,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03" (1/1) ... [2021-11-12 23:45:03,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03" (1/1) ... [2021-11-12 23:45:03,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03" (1/1) ... [2021-11-12 23:45:03,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03" (1/1) ... [2021-11-12 23:45:04,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03" (1/1) ... [2021-11-12 23:45:04,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03" (1/1) ... [2021-11-12 23:45:04,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:45:04,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:45:04,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:45:04,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:45:04,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03" (1/1) ... [2021-11-12 23:45:04,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:45:04,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:45:04,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:45:04,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:45:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 23:45:04,136 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 23:45:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 23:45:04,137 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 23:45:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:45:04,137 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:45:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-12 23:45:04,137 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-12 23:45:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:45:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:45:04,138 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:45:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:45:04,138 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:45:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:45:04,139 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:45:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:45:04,139 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:45:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:45:04,139 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:45:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:45:04,140 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:45:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:45:04,140 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:45:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:45:04,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:45:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:45:04,141 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:45:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:45:04,141 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:45:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:45:04,141 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:45:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:45:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:45:04,142 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:45:04,143 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:45:04,143 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:45:04,143 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:45:04,143 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:45:04,143 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:45:04,143 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:45:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:45:04,144 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:45:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:45:04,144 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:45:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:45:04,144 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:45:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:45:04,145 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:45:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:45:04,146 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:45:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-12 23:45:04,147 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-12 23:45:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:45:04,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:45:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:45:04,149 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:45:08,330 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:45:08,330 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-12 23:45:08,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:45:08 BoogieIcfgContainer [2021-11-12 23:45:08,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:45:08,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:45:08,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:45:08,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:45:08,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:45:02" (1/3) ... [2021-11-12 23:45:08,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5565e2ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:45:08, skipping insertion in model container [2021-11-12 23:45:08,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:03" (2/3) ... [2021-11-12 23:45:08,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5565e2ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:45:08, skipping insertion in model container [2021-11-12 23:45:08,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:45:08" (3/3) ... [2021-11-12 23:45:08,342 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product30.cil.c [2021-11-12 23:45:08,347 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:45:08,347 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:45:08,401 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:45:08,408 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:45:08,408 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:45:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 609 states, 479 states have (on average 1.6910229645093946) internal successors, (810), 499 states have internal predecessors, (810), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-12 23:45:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:45:08,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:08,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:08,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash -188363818, now seen corresponding path program 1 times [2021-11-12 23:45:08,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:08,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488598398] [2021-11-12 23:45:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:08,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:08,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:08,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:08,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:45:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:09,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:45:09,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:45:09,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:45:09,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:09,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488598398] [2021-11-12 23:45:09,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488598398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:09,590 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:09,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:45:09,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371057528] [2021-11-12 23:45:09,592 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:09,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:45:09,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:45:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:45:09,628 INFO L87 Difference]: Start difference. First operand has 609 states, 479 states have (on average 1.6910229645093946) internal successors, (810), 499 states have internal predecessors, (810), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:45:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:09,762 INFO L93 Difference]: Finished difference Result 1196 states and 2011 transitions. [2021-11-12 23:45:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:45:09,764 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-12 23:45:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:09,796 INFO L225 Difference]: With dead ends: 1196 [2021-11-12 23:45:09,797 INFO L226 Difference]: Without dead ends: 599 [2021-11-12 23:45:09,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 196 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 23:45:09,819 INFO L933 BasicCegarLoop]: 1002 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, 1002 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:09,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 9.14ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:45:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-12 23:45:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-12 23:45:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 472 states have (on average 1.673728813559322) internal successors, (790), 490 states have internal predecessors, (790), 102 states have call successors, (102), 26 states have call predecessors, (102), 24 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 23:45:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 991 transitions. [2021-11-12 23:45:09,957 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 991 transitions. Word has length 99 [2021-11-12 23:45:09,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:09,959 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 991 transitions. [2021-11-12 23:45:09,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:45:09,960 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 991 transitions. [2021-11-12 23:45:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:45:09,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:09,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:09,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:10,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:10,182 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1126882367, now seen corresponding path program 1 times [2021-11-12 23:45:10,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:10,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932033064] [2021-11-12 23:45:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:10,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:10,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:10,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:10,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:45:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:10,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:10,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:45:10,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:45:11,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:11,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932033064] [2021-11-12 23:45:11,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932033064] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:11,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:11,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:11,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046962771] [2021-11-12 23:45:11,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:11,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:11,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:11,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:11,158 INFO L87 Difference]: Start difference. First operand 599 states and 991 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:45:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:11,308 INFO L93 Difference]: Finished difference Result 1194 states and 1982 transitions. [2021-11-12 23:45:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:45:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2021-11-12 23:45:11,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:11,328 INFO L225 Difference]: With dead ends: 1194 [2021-11-12 23:45:11,329 INFO L226 Difference]: Without dead ends: 603 [2021-11-12 23:45:11,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:11,334 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 15 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2919 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.92ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:11,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2919 Invalid, 43 Unknown, 0 Unchecked, 18.92ms Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 51.30ms Time] [2021-11-12 23:45:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-12 23:45:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2021-11-12 23:45:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 475 states have (on average 1.6694736842105262) internal successors, (793), 493 states have internal predecessors, (793), 102 states have call successors, (102), 27 states have call predecessors, (102), 25 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 23:45:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 994 transitions. [2021-11-12 23:45:11,398 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 994 transitions. Word has length 83 [2021-11-12 23:45:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:11,401 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 994 transitions. [2021-11-12 23:45:11,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:45:11,401 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 994 transitions. [2021-11-12 23:45:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:45:11,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:11,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:11,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:11,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:11,629 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:11,630 INFO L85 PathProgramCache]: Analyzing trace with hash 368759945, now seen corresponding path program 1 times [2021-11-12 23:45:11,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:11,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347021390] [2021-11-12 23:45:11,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:11,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:11,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:11,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:11,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:45:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:12,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:12,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:45:12,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:45:12,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:12,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347021390] [2021-11-12 23:45:12,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347021390] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:12,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:12,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:45:12,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969092700] [2021-11-12 23:45:12,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:12,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:45:12,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:45:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:45:12,660 INFO L87 Difference]: Start difference. First operand 603 states and 994 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:12,945 INFO L93 Difference]: Finished difference Result 1218 states and 2013 transitions. [2021-11-12 23:45:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:45:12,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2021-11-12 23:45:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:12,954 INFO L225 Difference]: With dead ends: 1218 [2021-11-12 23:45:12,954 INFO L226 Difference]: Without dead ends: 625 [2021-11-12 23:45:12,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 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 23:45:12,959 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 119 mSDsluCounter, 4822 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5808 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.04ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 204.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:12,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5808 Invalid, 98 Unknown, 0 Unchecked, 14.04ms Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 204.60ms Time] [2021-11-12 23:45:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-12 23:45:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 616. [2021-11-12 23:45:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 485 states have (on average 1.665979381443299) internal successors, (808), 505 states have internal predecessors, (808), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (105), 97 states have call predecessors, (105), 100 states have call successors, (105) [2021-11-12 23:45:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1016 transitions. [2021-11-12 23:45:12,995 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1016 transitions. Word has length 85 [2021-11-12 23:45:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:12,995 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1016 transitions. [2021-11-12 23:45:12,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1016 transitions. [2021-11-12 23:45:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:45:12,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:12,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:13,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:13,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:13,212 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:13,213 INFO L85 PathProgramCache]: Analyzing trace with hash -663111298, now seen corresponding path program 1 times [2021-11-12 23:45:13,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:13,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433649971] [2021-11-12 23:45:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:13,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:13,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:13,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:13,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:45:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:13,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:13,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:45:14,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:45:14,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:14,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433649971] [2021-11-12 23:45:14,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433649971] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:14,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:14,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:45:14,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942429168] [2021-11-12 23:45:14,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:14,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:45:14,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:45:14,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:45:14,383 INFO L87 Difference]: Start difference. First operand 616 states and 1016 transitions. Second operand has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:14,824 INFO L93 Difference]: Finished difference Result 1238 states and 2046 transitions. [2021-11-12 23:45:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:45:14,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2021-11-12 23:45:14,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:14,833 INFO L225 Difference]: With dead ends: 1238 [2021-11-12 23:45:14,833 INFO L226 Difference]: Without dead ends: 634 [2021-11-12 23:45:14,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 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 23:45:14,849 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 105 mSDsluCounter, 4853 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 275.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5850 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 324.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:14,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5850 Invalid, 120 Unknown, 0 Unchecked, 15.27ms Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 324.35ms Time] [2021-11-12 23:45:14,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-12 23:45:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 616. [2021-11-12 23:45:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 485 states have (on average 1.665979381443299) internal successors, (808), 505 states have internal predecessors, (808), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (105), 97 states have call predecessors, (105), 100 states have call successors, (105) [2021-11-12 23:45:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1016 transitions. [2021-11-12 23:45:14,896 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1016 transitions. Word has length 86 [2021-11-12 23:45:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:14,897 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1016 transitions. [2021-11-12 23:45:14,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1016 transitions. [2021-11-12 23:45:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:45:14,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:14,903 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:14,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:15,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:15,108 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:15,109 INFO L85 PathProgramCache]: Analyzing trace with hash 887559175, now seen corresponding path program 1 times [2021-11-12 23:45:15,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:15,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780525226] [2021-11-12 23:45:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:15,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:15,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:15,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:15,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:45:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:15,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:45:15,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:45:16,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:16,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780525226] [2021-11-12 23:45:16,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780525226] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:16,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:16,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:45:16,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860905697] [2021-11-12 23:45:16,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:16,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:16,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:16,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:45:16,213 INFO L87 Difference]: Start difference. First operand 616 states and 1016 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:45:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:16,303 INFO L93 Difference]: Finished difference Result 1223 states and 2021 transitions. [2021-11-12 23:45:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:45:16,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 102 [2021-11-12 23:45:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:16,310 INFO L225 Difference]: With dead ends: 1223 [2021-11-12 23:45:16,311 INFO L226 Difference]: Without dead ends: 617 [2021-11-12 23:45:16,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:16,316 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 22 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2919 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.54ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:16,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2919 Invalid, 36 Unknown, 0 Unchecked, 6.54ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 43.16ms Time] [2021-11-12 23:45:16,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-12 23:45:16,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2021-11-12 23:45:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 487 states have (on average 1.6652977412731007) internal successors, (811), 506 states have internal predecessors, (811), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (101), 96 states have call predecessors, (101), 99 states have call successors, (101) [2021-11-12 23:45:16,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1014 transitions. [2021-11-12 23:45:16,346 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1014 transitions. Word has length 102 [2021-11-12 23:45:16,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:16,350 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1014 transitions. [2021-11-12 23:45:16,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:45:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1014 transitions. [2021-11-12 23:45:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:45:16,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:16,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:16,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:16,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:16,575 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:16,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash 247259682, now seen corresponding path program 1 times [2021-11-12 23:45:16,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:16,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401812742] [2021-11-12 23:45:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:16,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:16,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:16,581 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:16,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:45:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:17,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:17,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:45:17,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:45:17,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:17,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401812742] [2021-11-12 23:45:17,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401812742] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:17,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:17,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:45:17,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438359187] [2021-11-12 23:45:17,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:17,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:45:17,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:17,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:45:17,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:45:17,565 INFO L87 Difference]: Start difference. First operand 617 states and 1014 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:17,863 INFO L93 Difference]: Finished difference Result 1228 states and 2026 transitions. [2021-11-12 23:45:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:45:17,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2021-11-12 23:45:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:17,871 INFO L225 Difference]: With dead ends: 1228 [2021-11-12 23:45:17,871 INFO L226 Difference]: Without dead ends: 626 [2021-11-12 23:45:17,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 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 23:45:17,876 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 104 mSDsluCounter, 4810 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 201.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5799 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 231.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:17,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5799 Invalid, 107 Unknown, 0 Unchecked, 13.30ms Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 231.05ms Time] [2021-11-12 23:45:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-12 23:45:17,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 617. [2021-11-12 23:45:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 487 states have (on average 1.6652977412731007) internal successors, (811), 506 states have internal predecessors, (811), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (101), 96 states have call predecessors, (101), 99 states have call successors, (101) [2021-11-12 23:45:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1014 transitions. [2021-11-12 23:45:17,905 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1014 transitions. Word has length 88 [2021-11-12 23:45:17,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:17,906 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1014 transitions. [2021-11-12 23:45:17,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:17,906 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1014 transitions. [2021-11-12 23:45:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 23:45:17,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:17,910 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:17,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:18,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:18,135 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1575256772, now seen corresponding path program 1 times [2021-11-12 23:45:18,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:18,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159603891] [2021-11-12 23:45:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:18,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:18,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:18,138 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:18,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:45:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:18,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:18,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:45:18,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:45:19,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:19,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159603891] [2021-11-12 23:45:19,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159603891] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:19,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:19,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:19,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442982233] [2021-11-12 23:45:19,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:19,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:19,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:19,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:19,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:19,166 INFO L87 Difference]: Start difference. First operand 617 states and 1014 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:45:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:19,428 INFO L93 Difference]: Finished difference Result 1248 states and 2064 transitions. [2021-11-12 23:45:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:45:19,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 105 [2021-11-12 23:45:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:19,436 INFO L225 Difference]: With dead ends: 1248 [2021-11-12 23:45:19,437 INFO L226 Difference]: Without dead ends: 646 [2021-11-12 23:45:19,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:19,442 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 112 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2763 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.24ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 209.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:19,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2763 Invalid, 147 Unknown, 0 Unchecked, 7.24ms Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 209.04ms Time] [2021-11-12 23:45:19,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-12 23:45:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 637. [2021-11-12 23:45:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 506 states have (on average 1.6600790513833992) internal successors, (840), 525 states have internal predecessors, (840), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-12 23:45:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1042 transitions. [2021-11-12 23:45:19,482 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1042 transitions. Word has length 105 [2021-11-12 23:45:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:19,482 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1042 transitions. [2021-11-12 23:45:19,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:45:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1042 transitions. [2021-11-12 23:45:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 23:45:19,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:19,486 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:19,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:19,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:19,700 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash -35395587, now seen corresponding path program 1 times [2021-11-12 23:45:19,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:19,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726223309] [2021-11-12 23:45:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:19,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:19,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:19,703 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:19,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:45:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:20,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:20,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:45:20,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:45:20,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:20,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726223309] [2021-11-12 23:45:20,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726223309] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:20,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:20,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:45:20,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720184963] [2021-11-12 23:45:20,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:20,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:45:20,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:20,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:45:20,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:45:20,809 INFO L87 Difference]: Start difference. First operand 637 states and 1042 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:45:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:21,049 INFO L93 Difference]: Finished difference Result 1277 states and 2095 transitions. [2021-11-12 23:45:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:45:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 106 [2021-11-12 23:45:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:21,057 INFO L225 Difference]: With dead ends: 1277 [2021-11-12 23:45:21,057 INFO L226 Difference]: Without dead ends: 655 [2021-11-12 23:45:21,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 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 23:45:21,064 INFO L933 BasicCegarLoop]: 977 mSDtfsCounter, 154 mSDsluCounter, 4738 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5715 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.75ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:21,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5715 Invalid, 89 Unknown, 0 Unchecked, 9.75ms Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 167.59ms Time] [2021-11-12 23:45:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-12 23:45:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 637. [2021-11-12 23:45:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 506 states have (on average 1.6600790513833992) internal successors, (840), 525 states have internal predecessors, (840), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-12 23:45:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1042 transitions. [2021-11-12 23:45:21,100 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1042 transitions. Word has length 106 [2021-11-12 23:45:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:21,100 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1042 transitions. [2021-11-12 23:45:21,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:45:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1042 transitions. [2021-11-12 23:45:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:45:21,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:21,104 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:21,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 23:45:21,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:21,327 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1820851569, now seen corresponding path program 1 times [2021-11-12 23:45:21,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:21,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819719382] [2021-11-12 23:45:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:21,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:21,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:21,329 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:21,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:45:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:21,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:45:21,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:45:22,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:45:22,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:22,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819719382] [2021-11-12 23:45:22,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819719382] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:22,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:22,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:45:22,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719963048] [2021-11-12 23:45:22,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:22,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:45:22,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:22,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:45:22,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:45:22,394 INFO L87 Difference]: Start difference. First operand 637 states and 1042 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:22,724 INFO L93 Difference]: Finished difference Result 1272 states and 2086 transitions. [2021-11-12 23:45:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:45:22,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 91 [2021-11-12 23:45:22,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:22,735 INFO L225 Difference]: With dead ends: 1272 [2021-11-12 23:45:22,738 INFO L226 Difference]: Without dead ends: 650 [2021-11-12 23:45:22,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:45:22,745 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 112 mSDsluCounter, 5695 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6662 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.28ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 249.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:22,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6662 Invalid, 160 Unknown, 0 Unchecked, 8.28ms Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 249.82ms Time] [2021-11-12 23:45:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-12 23:45:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 641. [2021-11-12 23:45:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 510 states have (on average 1.6549019607843136) internal successors, (844), 529 states have internal predecessors, (844), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-12 23:45:22,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1046 transitions. [2021-11-12 23:45:22,777 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1046 transitions. Word has length 91 [2021-11-12 23:45:22,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:22,777 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1046 transitions. [2021-11-12 23:45:22,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1046 transitions. [2021-11-12 23:45:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:45:22,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:22,781 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] [2021-11-12 23:45:22,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:23,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:23,000 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:23,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:23,001 INFO L85 PathProgramCache]: Analyzing trace with hash -89885338, now seen corresponding path program 1 times [2021-11-12 23:45:23,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:23,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536651627] [2021-11-12 23:45:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:23,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:23,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:23,002 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:23,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:45:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:45:23,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:45:23,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:45:24,061 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:24,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536651627] [2021-11-12 23:45:24,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536651627] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:24,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:24,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:45:24,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167225494] [2021-11-12 23:45:24,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:24,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:45:24,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:24,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:45:24,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:45:24,063 INFO L87 Difference]: Start difference. First operand 641 states and 1046 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:24,467 INFO L93 Difference]: Finished difference Result 1282 states and 2098 transitions. [2021-11-12 23:45:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:45:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 92 [2021-11-12 23:45:24,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:24,475 INFO L225 Difference]: With dead ends: 1282 [2021-11-12 23:45:24,475 INFO L226 Difference]: Without dead ends: 656 [2021-11-12 23:45:24,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:45:24,480 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 108 mSDsluCounter, 5701 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 256.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6670 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.42ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 316.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:24,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6670 Invalid, 179 Unknown, 0 Unchecked, 7.42ms Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 316.24ms Time] [2021-11-12 23:45:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-11-12 23:45:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 647. [2021-11-12 23:45:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 516 states have (on average 1.6472868217054264) internal successors, (850), 535 states have internal predecessors, (850), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-12 23:45:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1052 transitions. [2021-11-12 23:45:24,508 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1052 transitions. Word has length 92 [2021-11-12 23:45:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:24,508 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1052 transitions. [2021-11-12 23:45:24,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1052 transitions. [2021-11-12 23:45:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 23:45:24,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:24,512 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] [2021-11-12 23:45:24,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:24,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:24,736 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2027140278, now seen corresponding path program 1 times [2021-11-12 23:45:24,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:24,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54711012] [2021-11-12 23:45:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:24,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:24,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:24,737 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:24,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:45:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:45:25,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:45:25,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:45:25,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:25,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54711012] [2021-11-12 23:45:25,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54711012] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:25,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:25,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:45:25,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293991480] [2021-11-12 23:45:25,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:25,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:45:25,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:25,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:45:25,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:45:25,768 INFO L87 Difference]: Start difference. First operand 647 states and 1052 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:26,165 INFO L93 Difference]: Finished difference Result 1296 states and 2114 transitions. [2021-11-12 23:45:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:45:26,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2021-11-12 23:45:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:26,174 INFO L225 Difference]: With dead ends: 1296 [2021-11-12 23:45:26,174 INFO L226 Difference]: Without dead ends: 664 [2021-11-12 23:45:26,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:45:26,179 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 108 mSDsluCounter, 5701 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 288.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6670 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.19ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 318.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:26,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6670 Invalid, 184 Unknown, 0 Unchecked, 7.19ms Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 318.90ms Time] [2021-11-12 23:45:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-12 23:45:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 655. [2021-11-12 23:45:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 524 states have (on average 1.6374045801526718) internal successors, (858), 543 states have internal predecessors, (858), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-12 23:45:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1060 transitions. [2021-11-12 23:45:26,211 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1060 transitions. Word has length 93 [2021-11-12 23:45:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:26,213 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1060 transitions. [2021-11-12 23:45:26,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:45:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1060 transitions. [2021-11-12 23:45:26,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-12 23:45:26,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:26,218 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:26,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:26,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:26,437 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:26,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1926633720, now seen corresponding path program 1 times [2021-11-12 23:45:26,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:26,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134813531] [2021-11-12 23:45:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:26,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:26,440 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:26,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:45:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:26,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:26,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:45:27,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:45:27,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:27,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134813531] [2021-11-12 23:45:27,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134813531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:27,427 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:27,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:45:27,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358838973] [2021-11-12 23:45:27,427 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:27,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:45:27,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:45:27,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:45:27,428 INFO L87 Difference]: Start difference. First operand 655 states and 1060 transitions. Second operand has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:45:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:27,708 INFO L93 Difference]: Finished difference Result 1235 states and 1998 transitions. [2021-11-12 23:45:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:45:27,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 110 [2021-11-12 23:45:27,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:27,717 INFO L225 Difference]: With dead ends: 1235 [2021-11-12 23:45:27,718 INFO L226 Difference]: Without dead ends: 673 [2021-11-12 23:45:27,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 210 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 23:45:27,723 INFO L933 BasicCegarLoop]: 977 mSDtfsCounter, 100 mSDsluCounter, 6663 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 194.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 7640 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.90ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 232.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:27,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 7640 Invalid, 136 Unknown, 0 Unchecked, 6.90ms Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 232.10ms Time] [2021-11-12 23:45:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-11-12 23:45:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 662. [2021-11-12 23:45:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 528 states have (on average 1.6325757575757576) internal successors, (862), 549 states have internal predecessors, (862), 103 states have call successors, (103), 29 states have call predecessors, (103), 30 states have return successors, (104), 97 states have call predecessors, (104), 100 states have call successors, (104) [2021-11-12 23:45:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1069 transitions. [2021-11-12 23:45:27,757 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1069 transitions. Word has length 110 [2021-11-12 23:45:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:27,758 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1069 transitions. [2021-11-12 23:45:27,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:45:27,758 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1069 transitions. [2021-11-12 23:45:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:45:27,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:27,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:27,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:27,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:27,981 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:27,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1980416747, now seen corresponding path program 1 times [2021-11-12 23:45:27,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:27,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241516089] [2021-11-12 23:45:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:27,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:27,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:27,983 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:27,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:45:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:28,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:28,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:45:28,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:45:28,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:28,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241516089] [2021-11-12 23:45:28,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241516089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:28,970 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:28,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:45:28,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079138078] [2021-11-12 23:45:28,970 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:28,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:45:28,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:28,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:45:28,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:45:28,971 INFO L87 Difference]: Start difference. First operand 662 states and 1069 transitions. Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:45:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:29,329 INFO L93 Difference]: Finished difference Result 1238 states and 2001 transitions. [2021-11-12 23:45:29,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:45:29,341 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 96 [2021-11-12 23:45:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:29,348 INFO L225 Difference]: With dead ends: 1238 [2021-11-12 23:45:29,348 INFO L226 Difference]: Without dead ends: 676 [2021-11-12 23:45:29,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 182 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 23:45:29,353 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 181 mSDsluCounter, 5840 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 276.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 6819 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.18ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 304.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:29,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 6819 Invalid, 150 Unknown, 0 Unchecked, 7.18ms Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 304.11ms Time] [2021-11-12 23:45:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-11-12 23:45:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 669. [2021-11-12 23:45:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 532 states have (on average 1.6278195488721805) internal successors, (866), 555 states have internal predecessors, (866), 104 states have call successors, (104), 29 states have call predecessors, (104), 32 states have return successors, (108), 98 states have call predecessors, (108), 101 states have call successors, (108) [2021-11-12 23:45:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1078 transitions. [2021-11-12 23:45:29,403 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1078 transitions. Word has length 96 [2021-11-12 23:45:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:29,403 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1078 transitions. [2021-11-12 23:45:29,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:45:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1078 transitions. [2021-11-12 23:45:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:45:29,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:29,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:29,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:29,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:29,627 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:29,627 INFO L85 PathProgramCache]: Analyzing trace with hash 179411902, now seen corresponding path program 1 times [2021-11-12 23:45:29,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:29,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452765947] [2021-11-12 23:45:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:29,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:29,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:29,629 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:29,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:45:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:30,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:30,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:45:30,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:45:30,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:30,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452765947] [2021-11-12 23:45:30,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452765947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:30,759 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:30,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:45:30,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101169693] [2021-11-12 23:45:30,759 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:30,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:45:30,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:45:30,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:45:30,761 INFO L87 Difference]: Start difference. First operand 669 states and 1078 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:45:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:31,032 INFO L93 Difference]: Finished difference Result 1239 states and 2002 transitions. [2021-11-12 23:45:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:45:31,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2021-11-12 23:45:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:31,041 INFO L225 Difference]: With dead ends: 1239 [2021-11-12 23:45:31,041 INFO L226 Difference]: Without dead ends: 677 [2021-11-12 23:45:31,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 217 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 23:45:31,046 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 171 mSDsluCounter, 4756 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 5737 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.90ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:31,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 5737 Invalid, 93 Unknown, 0 Unchecked, 7.90ms Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 217.95ms Time] [2021-11-12 23:45:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-11-12 23:45:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 672. [2021-11-12 23:45:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 534 states have (on average 1.6254681647940075) internal successors, (868), 558 states have internal predecessors, (868), 104 states have call successors, (104), 29 states have call predecessors, (104), 33 states have return successors, (109), 98 states have call predecessors, (109), 101 states have call successors, (109) [2021-11-12 23:45:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1081 transitions. [2021-11-12 23:45:31,083 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1081 transitions. Word has length 112 [2021-11-12 23:45:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:31,084 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1081 transitions. [2021-11-12 23:45:31,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:45:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1081 transitions. [2021-11-12 23:45:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:45:31,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:31,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:31,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:31,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:31,310 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:31,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash 193735004, now seen corresponding path program 1 times [2021-11-12 23:45:31,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:31,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245798527] [2021-11-12 23:45:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:31,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:31,313 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:31,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:45:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:31,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:45:32,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:32,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:32,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245798527] [2021-11-12 23:45:32,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245798527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:32,306 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:32,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:45:32,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872071743] [2021-11-12 23:45:32,306 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:32,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:32,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:32,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:45:32,309 INFO L87 Difference]: Start difference. First operand 672 states and 1081 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:45:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:32,378 INFO L93 Difference]: Finished difference Result 1309 states and 2110 transitions. [2021-11-12 23:45:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:45:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 112 [2021-11-12 23:45:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:32,384 INFO L225 Difference]: With dead ends: 1309 [2021-11-12 23:45:32,384 INFO L226 Difference]: Without dead ends: 622 [2021-11-12 23:45:32,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:32,410 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 37 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.21ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:32,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1947 Invalid, 32 Unknown, 0 Unchecked, 2.21ms Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 37.39ms Time] [2021-11-12 23:45:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-12 23:45:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2021-11-12 23:45:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 491 states have (on average 1.6089613034623218) internal successors, (790), 510 states have internal predecessors, (790), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 23:45:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 991 transitions. [2021-11-12 23:45:32,435 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 991 transitions. Word has length 112 [2021-11-12 23:45:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:32,436 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 991 transitions. [2021-11-12 23:45:32,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:45:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 991 transitions. [2021-11-12 23:45:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:45:32,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:32,439 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:32,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:32,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:32,654 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2042780641, now seen corresponding path program 1 times [2021-11-12 23:45:32,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:32,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627737019] [2021-11-12 23:45:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:32,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:32,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:32,657 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:32,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:45:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:45:33,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:45:33,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:33,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627737019] [2021-11-12 23:45:33,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627737019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:33,614 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:33,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:45:33,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045525578] [2021-11-12 23:45:33,614 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:33,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:45:33,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:33,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:45:33,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:33,616 INFO L87 Difference]: Start difference. First operand 622 states and 991 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:45:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:33,773 INFO L93 Difference]: Finished difference Result 1270 states and 2015 transitions. [2021-11-12 23:45:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:45:33,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 114 [2021-11-12 23:45:33,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:33,780 INFO L225 Difference]: With dead ends: 1270 [2021-11-12 23:45:33,780 INFO L226 Difference]: Without dead ends: 619 [2021-11-12 23:45:33,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 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 23:45:33,784 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 193 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:33,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1858 Invalid, 89 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 114.44ms Time] [2021-11-12 23:45:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-12 23:45:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2021-11-12 23:45:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 488 states have (on average 1.5881147540983607) internal successors, (775), 506 states have internal predecessors, (775), 102 states have call successors, (102), 30 states have call predecessors, (102), 28 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 23:45:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 976 transitions. [2021-11-12 23:45:33,808 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 976 transitions. Word has length 114 [2021-11-12 23:45:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:33,808 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 976 transitions. [2021-11-12 23:45:33,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:45:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 976 transitions. [2021-11-12 23:45:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 23:45:33,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:33,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:45:33,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:34,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:34,033 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:34,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1190422952, now seen corresponding path program 1 times [2021-11-12 23:45:34,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:34,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384537007] [2021-11-12 23:45:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:34,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:34,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:34,035 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:34,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:45:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:34,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:45:34,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:45:35,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:45:35,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:35,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384537007] [2021-11-12 23:45:35,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384537007] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:35,463 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:35,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 23:45:35,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48862028] [2021-11-12 23:45:35,464 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:35,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:45:35,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:35,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:45:35,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:45:35,466 INFO L87 Difference]: Start difference. First operand 619 states and 976 transitions. Second operand has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 6 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:45:37,513 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:39,521 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 23:45:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:49,153 INFO L93 Difference]: Finished difference Result 3127 states and 5126 transitions. [2021-11-12 23:45:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:45:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 6 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 115 [2021-11-12 23:45:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:49,176 INFO L225 Difference]: With dead ends: 3127 [2021-11-12 23:45:49,176 INFO L226 Difference]: Without dead ends: 2569 [2021-11-12 23:45:49,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:45:49,182 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 5682 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 5227 mSolverCounterSat, 1664 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11914.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5876 SdHoareTripleChecker+Valid, 3202 SdHoareTripleChecker+Invalid, 6893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 55.98ms SdHoareTripleChecker+Time, 1664 IncrementalHoareTripleChecker+Valid, 5227 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13302.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:49,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5876 Valid, 3202 Invalid, 6893 Unknown, 0 Unchecked, 55.98ms Time], IncrementalHoareTripleChecker [1664 Valid, 5227 Invalid, 2 Unknown, 0 Unchecked, 13302.05ms Time] [2021-11-12 23:45:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-11-12 23:45:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2320. [2021-11-12 23:45:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 1816 states have (on average 1.625) internal successors, (2951), 1875 states have internal predecessors, (2951), 412 states have call successors, (412), 91 states have call predecessors, (412), 91 states have return successors, (437), 380 states have call predecessors, (437), 407 states have call successors, (437) [2021-11-12 23:45:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3800 transitions. [2021-11-12 23:45:49,334 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3800 transitions. Word has length 115 [2021-11-12 23:45:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:49,334 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 3800 transitions. [2021-11-12 23:45:49,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 9 states have internal predecessors, (128), 6 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:45:49,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3800 transitions. [2021-11-12 23:45:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:45:49,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:49,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:49,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:49,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:49,563 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:49,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:49,563 INFO L85 PathProgramCache]: Analyzing trace with hash 790900229, now seen corresponding path program 1 times [2021-11-12 23:45:49,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:49,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640672211] [2021-11-12 23:45:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:49,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:49,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:49,564 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:49,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:45:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:50,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:45:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:45:51,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:45:54,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:54,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640672211] [2021-11-12 23:45:54,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640672211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:54,055 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:54,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 23:45:54,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354522952] [2021-11-12 23:45:54,055 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:54,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:45:54,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:54,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:45:54,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:45:54,057 INFO L87 Difference]: Start difference. First operand 2320 states and 3800 transitions. Second operand has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-12 23:45:56,079 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 23:45:58,085 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:00,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:02,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:33,534 INFO L93 Difference]: Finished difference Result 5404 states and 8955 transitions. [2021-11-12 23:46:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:46:33,539 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 137 [2021-11-12 23:46:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:33,562 INFO L225 Difference]: With dead ends: 5404 [2021-11-12 23:46:33,562 INFO L226 Difference]: Without dead ends: 3145 [2021-11-12 23:46:33,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:46:33,577 INFO L933 BasicCegarLoop]: 1178 mSDtfsCounter, 2336 mSDsluCounter, 3051 mSDsCounter, 0 mSdLazyCounter, 7637 mSolverCounterSat, 566 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33683.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2433 SdHoareTripleChecker+Valid, 4229 SdHoareTripleChecker+Invalid, 8207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 58.31ms SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 7637 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38807.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:33,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2433 Valid, 4229 Invalid, 8207 Unknown, 0 Unchecked, 58.31ms Time], IncrementalHoareTripleChecker [566 Valid, 7637 Invalid, 4 Unknown, 0 Unchecked, 38807.47ms Time] [2021-11-12 23:46:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2021-11-12 23:46:33,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2655. [2021-11-12 23:46:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2025 states have (on average 1.6138271604938272) internal successors, (3268), 2106 states have internal predecessors, (3268), 533 states have call successors, (533), 92 states have call predecessors, (533), 96 states have return successors, (571), 495 states have call predecessors, (571), 528 states have call successors, (571) [2021-11-12 23:46:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 4372 transitions. [2021-11-12 23:46:33,785 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 4372 transitions. Word has length 137 [2021-11-12 23:46:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:33,786 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 4372 transitions. [2021-11-12 23:46:33,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-12 23:46:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 4372 transitions. [2021-11-12 23:46:33,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:46:33,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:33,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:33,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:34,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:34,028 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:34,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:34,029 INFO L85 PathProgramCache]: Analyzing trace with hash 811089609, now seen corresponding path program 1 times [2021-11-12 23:46:34,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:34,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818690051] [2021-11-12 23:46:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:34,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:34,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:34,030 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:34,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:46:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:34,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:46:34,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:46:34,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:46:35,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:35,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818690051] [2021-11-12 23:46:35,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818690051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:35,174 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:46:35,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-12 23:46:35,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85195041] [2021-11-12 23:46:35,174 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:35,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:46:35,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:46:35,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:46:35,177 INFO L87 Difference]: Start difference. First operand 2655 states and 4372 transitions. Second operand has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:46:35,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:35,569 INFO L93 Difference]: Finished difference Result 5024 states and 8255 transitions. [2021-11-12 23:46:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:46:35,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 137 [2021-11-12 23:46:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:35,591 INFO L225 Difference]: With dead ends: 5024 [2021-11-12 23:46:35,591 INFO L226 Difference]: Without dead ends: 2430 [2021-11-12 23:46:35,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:46:35,632 INFO L933 BasicCegarLoop]: 1122 mSDtfsCounter, 806 mSDsluCounter, 5400 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.62ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 202.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:35,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 6522 Invalid, 127 Unknown, 0 Unchecked, 15.62ms Time], IncrementalHoareTripleChecker [62 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 202.77ms Time] [2021-11-12 23:46:35,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-11-12 23:46:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 2236. [2021-11-12 23:46:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 1745 states have (on average 1.5679083094555875) internal successors, (2736), 1788 states have internal predecessors, (2736), 396 states have call successors, (396), 91 states have call predecessors, (396), 94 states have return successors, (456), 378 states have call predecessors, (456), 389 states have call successors, (456) [2021-11-12 23:46:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 3588 transitions. [2021-11-12 23:46:35,764 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 3588 transitions. Word has length 137 [2021-11-12 23:46:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:35,764 INFO L470 AbstractCegarLoop]: Abstraction has 2236 states and 3588 transitions. [2021-11-12 23:46:35,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:46:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 3588 transitions. [2021-11-12 23:46:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-12 23:46:35,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:35,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:35,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:35,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:35,992 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:35,993 INFO L85 PathProgramCache]: Analyzing trace with hash -974536174, now seen corresponding path program 1 times [2021-11-12 23:46:35,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:35,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194254009] [2021-11-12 23:46:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:35,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:35,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:35,994 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:35,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:46:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:36,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:46:36,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:46:36,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:46:37,614 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:37,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194254009] [2021-11-12 23:46:37,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194254009] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:37,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:37,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2021-11-12 23:46:37,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441173167] [2021-11-12 23:46:37,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:37,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:46:37,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:37,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:46:37,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:46:37,615 INFO L87 Difference]: Start difference. First operand 2236 states and 3588 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-12 23:46:39,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:46,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:46,049 INFO L93 Difference]: Finished difference Result 8262 states and 13910 transitions. [2021-11-12 23:46:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:46:46,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 138 [2021-11-12 23:46:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:46,105 INFO L225 Difference]: With dead ends: 8262 [2021-11-12 23:46:46,105 INFO L226 Difference]: Without dead ends: 5910 [2021-11-12 23:46:46,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:46:46,122 INFO L933 BasicCegarLoop]: 1156 mSDtfsCounter, 3218 mSDsluCounter, 2508 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 990 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7091.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3395 SdHoareTripleChecker+Valid, 3664 SdHoareTripleChecker+Invalid, 4751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.10ms SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7911.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:46,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3395 Valid, 3664 Invalid, 4751 Unknown, 0 Unchecked, 35.10ms Time], IncrementalHoareTripleChecker [990 Valid, 3760 Invalid, 1 Unknown, 0 Unchecked, 7911.67ms Time] [2021-11-12 23:46:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2021-11-12 23:46:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 4709. [2021-11-12 23:46:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 3571 states have (on average 1.5771492579109494) internal successors, (5632), 3691 states have internal predecessors, (5632), 942 states have call successors, (942), 161 states have call predecessors, (942), 195 states have return successors, (1269), 916 states have call predecessors, (1269), 930 states have call successors, (1269) [2021-11-12 23:46:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 7843 transitions. [2021-11-12 23:46:46,792 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 7843 transitions. Word has length 138 [2021-11-12 23:46:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:46,793 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 7843 transitions. [2021-11-12 23:46:46,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-12 23:46:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 7843 transitions. [2021-11-12 23:46:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:46:46,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:46,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:46,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:47,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:47,014 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:47,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:47,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1359766422, now seen corresponding path program 1 times [2021-11-12 23:46:47,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:47,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549613093] [2021-11-12 23:46:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:47,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:47,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:47,016 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:47,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:46:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:46:47,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:46:47,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:46:48,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:48,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549613093] [2021-11-12 23:46:48,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549613093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:48,475 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:46:48,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:46:48,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060749016] [2021-11-12 23:46:48,476 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:48,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:46:48,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:46:48,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:48,478 INFO L87 Difference]: Start difference. First operand 4709 states and 7843 transitions. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 23:46:50,501 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:52,505 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:00,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:00,972 INFO L93 Difference]: Finished difference Result 17488 states and 30295 transitions. [2021-11-12 23:47:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:47:00,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) Word has length 139 [2021-11-12 23:47:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:01,096 INFO L225 Difference]: With dead ends: 17488 [2021-11-12 23:47:01,096 INFO L226 Difference]: Without dead ends: 12840 [2021-11-12 23:47:01,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:47:01,135 INFO L933 BasicCegarLoop]: 1662 mSDtfsCounter, 4516 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 4569 mSolverCounterSat, 1294 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10495.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4618 SdHoareTripleChecker+Valid, 3363 SdHoareTripleChecker+Invalid, 5865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.71ms SdHoareTripleChecker+Time, 1294 IncrementalHoareTripleChecker+Valid, 4569 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11482.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:01,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4618 Valid, 3363 Invalid, 5865 Unknown, 0 Unchecked, 41.71ms Time], IncrementalHoareTripleChecker [1294 Valid, 4569 Invalid, 2 Unknown, 0 Unchecked, 11482.32ms Time] [2021-11-12 23:47:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12840 states. [2021-11-12 23:47:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12840 to 11982. [2021-11-12 23:47:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11982 states, 9005 states have (on average 1.580566352026652) internal successors, (14233), 9366 states have internal predecessors, (14233), 2479 states have call successors, (2479), 416 states have call predecessors, (2479), 497 states have return successors, (3364), 2379 states have call predecessors, (3364), 2461 states have call successors, (3364) [2021-11-12 23:47:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11982 states to 11982 states and 20076 transitions. [2021-11-12 23:47:02,154 INFO L78 Accepts]: Start accepts. Automaton has 11982 states and 20076 transitions. Word has length 139 [2021-11-12 23:47:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:02,154 INFO L470 AbstractCegarLoop]: Abstraction has 11982 states and 20076 transitions. [2021-11-12 23:47:02,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 23:47:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 11982 states and 20076 transitions. [2021-11-12 23:47:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 23:47:02,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:02,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:02,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:02,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:02,386 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:02,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:02,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1510392504, now seen corresponding path program 1 times [2021-11-12 23:47:02,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:02,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93074070] [2021-11-12 23:47:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:02,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:02,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:02,389 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:02,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:47:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:02,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:47:02,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:47:03,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:47:04,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:04,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93074070] [2021-11-12 23:47:04,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93074070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:04,015 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:04,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 23:47:04,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071349968] [2021-11-12 23:47:04,015 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:04,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:47:04,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:47:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:47:04,016 INFO L87 Difference]: Start difference. First operand 11982 states and 20076 transitions. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:47:06,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:08,045 WARN L515 Checker$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 23:47:10,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:12,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:14,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:29,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:29,696 INFO L93 Difference]: Finished difference Result 41885 states and 75843 transitions. [2021-11-12 23:47:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:47:29,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) Word has length 145 [2021-11-12 23:47:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:29,953 INFO L225 Difference]: With dead ends: 41885 [2021-11-12 23:47:29,953 INFO L226 Difference]: Without dead ends: 29892 [2021-11-12 23:47:30,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:47:30,081 INFO L933 BasicCegarLoop]: 2024 mSDtfsCounter, 5099 mSDsluCounter, 3780 mSDsCounter, 0 mSdLazyCounter, 10781 mSolverCounterSat, 2194 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21794.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5207 SdHoareTripleChecker+Valid, 5804 SdHoareTripleChecker+Invalid, 12980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 67.76ms SdHoareTripleChecker+Time, 2194 IncrementalHoareTripleChecker+Valid, 10781 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23393.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:30,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5207 Valid, 5804 Invalid, 12980 Unknown, 0 Unchecked, 67.76ms Time], IncrementalHoareTripleChecker [2194 Valid, 10781 Invalid, 5 Unknown, 0 Unchecked, 23393.59ms Time] [2021-11-12 23:47:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29892 states. [2021-11-12 23:47:31,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29892 to 22435. [2021-11-12 23:47:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22435 states, 16271 states have (on average 1.5539303054514166) internal successors, (25284), 17104 states have internal predecessors, (25284), 5229 states have call successors, (5229), 665 states have call predecessors, (5229), 934 states have return successors, (7588), 5207 states have call predecessors, (7588), 5201 states have call successors, (7588) [2021-11-12 23:47:32,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22435 states to 22435 states and 38101 transitions. [2021-11-12 23:47:32,275 INFO L78 Accepts]: Start accepts. Automaton has 22435 states and 38101 transitions. Word has length 145 [2021-11-12 23:47:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:32,276 INFO L470 AbstractCegarLoop]: Abstraction has 22435 states and 38101 transitions. [2021-11-12 23:47:32,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:47:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 22435 states and 38101 transitions. [2021-11-12 23:47:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 23:47:32,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:32,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:32,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:32,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:32,504 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:32,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1641724685, now seen corresponding path program 1 times [2021-11-12 23:47:32,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:32,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681909109] [2021-11-12 23:47:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:32,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:32,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:32,507 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:32,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:47:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:33,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:47:33,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:47:33,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:47:34,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:34,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681909109] [2021-11-12 23:47:34,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681909109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:34,107 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:34,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:47:34,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721406621] [2021-11-12 23:47:34,107 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:34,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:47:34,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:34,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:47:34,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:47:34,108 INFO L87 Difference]: Start difference. First operand 22435 states and 38101 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:47:36,127 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 23:47:38,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:40,140 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:49,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:49,210 INFO L93 Difference]: Finished difference Result 82215 states and 153632 transitions. [2021-11-12 23:47:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:47:49,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 146 [2021-11-12 23:47:49,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:49,885 INFO L225 Difference]: With dead ends: 82215 [2021-11-12 23:47:49,885 INFO L226 Difference]: Without dead ends: 59841 [2021-11-12 23:47:50,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:47:50,163 INFO L933 BasicCegarLoop]: 1897 mSDtfsCounter, 4765 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 2988 mSolverCounterSat, 1603 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10076.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4873 SdHoareTripleChecker+Valid, 3038 SdHoareTripleChecker+Invalid, 4594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.60ms SdHoareTripleChecker+Time, 1603 IncrementalHoareTripleChecker+Valid, 2988 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10743.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:50,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4873 Valid, 3038 Invalid, 4594 Unknown, 0 Unchecked, 25.60ms Time], IncrementalHoareTripleChecker [1603 Valid, 2988 Invalid, 3 Unknown, 0 Unchecked, 10743.38ms Time] [2021-11-12 23:47:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59841 states. [2021-11-12 23:47:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59841 to 50305. [2021-11-12 23:47:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50305 states, 34701 states have (on average 1.5304169908648166) internal successors, (53107), 36887 states have internal predecessors, (53107), 13631 states have call successors, (13631), 1177 states have call predecessors, (13631), 1972 states have return successors, (20776), 13908 states have call predecessors, (20776), 13583 states have call successors, (20776) [2021-11-12 23:47:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50305 states to 50305 states and 87514 transitions. [2021-11-12 23:47:55,982 INFO L78 Accepts]: Start accepts. Automaton has 50305 states and 87514 transitions. Word has length 146 [2021-11-12 23:47:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:55,982 INFO L470 AbstractCegarLoop]: Abstraction has 50305 states and 87514 transitions. [2021-11-12 23:47:55,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:47:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 50305 states and 87514 transitions. [2021-11-12 23:47:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:47:55,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:55,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:56,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:56,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:56,204 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:56,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2068996155, now seen corresponding path program 1 times [2021-11-12 23:47:56,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:56,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713359029] [2021-11-12 23:47:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:56,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:56,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:56,207 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:56,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d543fab-0cc5-40c3-b9b0-21e4f73c53c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:47:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:56,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:47:56,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:47:57,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:47:57,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:57,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713359029] [2021-11-12 23:47:57,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713359029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:57,676 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:57,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:47:57,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064673594] [2021-11-12 23:47:57,677 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:57,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:47:57,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:47:57,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:47:57,678 INFO L87 Difference]: Start difference. First operand 50305 states and 87514 transitions. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:47:59,711 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:01,717 WARN L515 Checker$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 23:48:22,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:22,171 INFO L93 Difference]: Finished difference Result 205049 states and 400676 transitions. [2021-11-12 23:48:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:48:22,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 147 [2021-11-12 23:48:22,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:23,946 INFO L225 Difference]: With dead ends: 205049 [2021-11-12 23:48:23,946 INFO L226 Difference]: Without dead ends: 154805 [2021-11-12 23:48:25,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:48:25,082 INFO L933 BasicCegarLoop]: 1898 mSDtfsCounter, 4577 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 3104 mSolverCounterSat, 1412 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8774.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4687 SdHoareTripleChecker+Valid, 3197 SdHoareTripleChecker+Invalid, 4518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.14ms SdHoareTripleChecker+Time, 1412 IncrementalHoareTripleChecker+Valid, 3104 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9687.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:25,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4687 Valid, 3197 Invalid, 4518 Unknown, 0 Unchecked, 31.14ms Time], IncrementalHoareTripleChecker [1412 Valid, 3104 Invalid, 2 Unknown, 0 Unchecked, 9687.77ms Time] [2021-11-12 23:48:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154805 states.