./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.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_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/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_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/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_7ee85403-b04c-4450-9e8f-5caad8038073/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 a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:30:32,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:30:32,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:30:32,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:30:32,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:30:32,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:30:32,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:30:32,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:30:32,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:30:32,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:30:32,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:30:32,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:30:32,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:30:32,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:30:32,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:30:32,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:30:32,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:30:32,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:30:32,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:30:32,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:30:32,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:30:32,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:30:32,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:30:32,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:30:32,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:30:32,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:30:32,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:30:32,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:30:32,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:30:32,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:30:32,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:30:32,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:30:32,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:30:32,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:30:32,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:30:32,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:30:32,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:30:32,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:30:32,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:30:32,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:30:32,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:30:32,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:30:32,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:30:32,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:30:32,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:30:32,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:30:32,668 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:30:32,669 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:30:32,669 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:30:32,669 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:30:32,678 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:30:32,678 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:30:32,680 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:30:32,680 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:30:32,680 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:30:32,681 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:30:32,681 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:30:32,681 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:30:32,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:30:32,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:30:32,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:30:32,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:30:32,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:30:32,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:30:32,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:30:32,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:30:32,686 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:30:32,686 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:30:32,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:30:32,687 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:30:32,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:30:32,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:30:32,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:30:32,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:30:32,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:30:32,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:30:32,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:30:32,692 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:30:32,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:30:32,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:30:32,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:30:32,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:30:32,694 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_7ee85403-b04c-4450-9e8f-5caad8038073/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2021-11-12 23:30:33,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:30:33,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:30:33,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:30:33,079 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:30:33,081 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:30:33,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-12 23:30:33,202 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/data/58097313c/5e901223e4bb4fc48d2700a5a9265987/FLAG33498c790 [2021-11-12 23:30:33,954 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:30:33,955 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-12 23:30:33,993 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/data/58097313c/5e901223e4bb4fc48d2700a5a9265987/FLAG33498c790 [2021-11-12 23:30:34,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/data/58097313c/5e901223e4bb4fc48d2700a5a9265987 [2021-11-12 23:30:34,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:30:34,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:30:34,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:30:34,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:30:34,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:30:34,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:30:34" (1/1) ... [2021-11-12 23:30:34,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49c14c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:34, skipping insertion in model container [2021-11-12 23:30:34,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:30:34" (1/1) ... [2021-11-12 23:30:34,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:30:34,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:30:34,476 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_7ee85403-b04c-4450-9e8f-5caad8038073/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-12 23:30:34,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:30:35,013 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 23:30:35,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@750a014a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:35, skipping insertion in model container [2021-11-12 23:30:35,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:30:35,015 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:30:35,018 INFO L158 Benchmark]: Toolchain (without parser) took 863.50ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 54.8MB in the beginning and 75.7MB in the end (delta: -20.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:30:35,020 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory was 62.5MB in the beginning and 62.5MB in the end (delta: 21.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:30:35,022 INFO L158 Benchmark]: CACSL2BoogieTranslator took 856.93ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 54.7MB in the beginning and 75.7MB in the end (delta: -21.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:30:35,025 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory was 62.5MB in the beginning and 62.5MB in the end (delta: 21.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 856.93ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 54.7MB in the beginning and 75.7MB in the end (delta: -21.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2544]: 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_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/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_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/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_7ee85403-b04c-4450-9e8f-5caad8038073/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 a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:30:37,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:30:37,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:30:37,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:30:37,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:30:37,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:30:37,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:30:37,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:30:37,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:30:37,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:30:37,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:30:37,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:30:37,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:30:37,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:30:37,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:30:37,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:30:37,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:30:37,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:30:37,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:30:37,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:30:37,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:30:37,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:30:37,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:30:37,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:30:37,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:30:37,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:30:37,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:30:37,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:30:37,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:30:37,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:30:37,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:30:37,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:30:37,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:30:37,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:30:37,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:30:37,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:30:37,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:30:37,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:30:37,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:30:37,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:30:37,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:30:37,769 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:30:37,817 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:30:37,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:30:37,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:30:37,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:30:37,819 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:30:37,820 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:30:37,820 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:30:37,820 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:30:37,820 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:30:37,821 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:30:37,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:30:37,824 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:30:37,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:30:37,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:30:37,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:30:37,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:30:37,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:30:37,825 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:30:37,825 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:30:37,826 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:30:37,826 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:30:37,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:30:37,826 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:30:37,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:30:37,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:30:37,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:30:37,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:30:37,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:30:37,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:30:37,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:30:37,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:30:37,829 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:30:37,829 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:30:37,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:30:37,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:30:37,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:30:37,830 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_7ee85403-b04c-4450-9e8f-5caad8038073/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2021-11-12 23:30:38,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:30:38,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:30:38,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:30:38,276 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:30:38,279 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:30:38,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-12 23:30:38,356 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/data/f8a10bec4/70ba132328244e72988e0c286b65e99d/FLAG6f09ca1a2 [2021-11-12 23:30:38,988 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:30:38,989 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-12 23:30:39,018 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/data/f8a10bec4/70ba132328244e72988e0c286b65e99d/FLAG6f09ca1a2 [2021-11-12 23:30:39,210 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/data/f8a10bec4/70ba132328244e72988e0c286b65e99d [2021-11-12 23:30:39,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:30:39,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:30:39,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:30:39,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:30:39,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:30:39,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160f784d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39, skipping insertion in model container [2021-11-12 23:30:39,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:30:39,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:30:39,575 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_7ee85403-b04c-4450-9e8f-5caad8038073/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-12 23:30:40,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:30:40,037 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:30:40,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:30:40,066 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_7ee85403-b04c-4450-9e8f-5caad8038073/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-12 23:30:40,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:30:40,257 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:30:40,270 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_7ee85403-b04c-4450-9e8f-5caad8038073/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-12 23:30:40,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:30:40,411 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:30:40,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40 WrapperNode [2021-11-12 23:30:40,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:30:40,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:30:40,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:30:40,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:30:40,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40" (1/1) ... [2021-11-12 23:30:40,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40" (1/1) ... [2021-11-12 23:30:40,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:30:40,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:30:40,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:30:40,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:30:40,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40" (1/1) ... [2021-11-12 23:30:40,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40" (1/1) ... [2021-11-12 23:30:40,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40" (1/1) ... [2021-11-12 23:30:40,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40" (1/1) ... [2021-11-12 23:30:40,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40" (1/1) ... [2021-11-12 23:30:40,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40" (1/1) ... [2021-11-12 23:30:40,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40" (1/1) ... [2021-11-12 23:30:40,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:30:40,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:30:40,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:30:40,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:30:40,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40" (1/1) ... [2021-11-12 23:30:40,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:30:40,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:40,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:30:40,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:30:40,765 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 23:30:40,768 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 23:30:40,768 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:30:40,768 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:30:40,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:30:40,769 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:30:40,769 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:30:40,769 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:30:40,769 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:30:40,769 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:30:40,770 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:30:40,770 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:30:40,770 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:30:40,770 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:30:40,770 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:30:40,771 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:30:40,771 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:30:40,771 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:30:40,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:30:40,771 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:30:40,772 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:30:40,772 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:30:40,772 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:30:40,772 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:30:40,772 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:30:40,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:30:40,773 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:30:40,773 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:30:40,773 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:30:40,773 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:30:40,774 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:30:40,774 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:30:40,775 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:30:40,775 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:30:40,775 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:30:40,775 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:30:40,776 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:30:40,776 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:30:40,777 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:30:40,777 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:30:40,777 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:30:40,777 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:30:40,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:30:40,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:30:40,778 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:30:40,778 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:30:44,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:30:44,540 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:30:44,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:30:44 BoogieIcfgContainer [2021-11-12 23:30:44,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:30:44,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:30:44,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:30:44,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:30:44,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:30:39" (1/3) ... [2021-11-12 23:30:44,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9bfcd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:30:44, skipping insertion in model container [2021-11-12 23:30:44,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:40" (2/3) ... [2021-11-12 23:30:44,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9bfcd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:30:44, skipping insertion in model container [2021-11-12 23:30:44,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:30:44" (3/3) ... [2021-11-12 23:30:44,553 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product01.cil.c [2021-11-12 23:30:44,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:30:44,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:30:44,638 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:30:44,651 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:30:44,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:30:44,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 524 states, 412 states have (on average 1.7111650485436893) internal successors, (705), 433 states have internal predecessors, (705), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:30:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:30:44,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:44,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:44,716 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:44,721 INFO L85 PathProgramCache]: Analyzing trace with hash 775009711, now seen corresponding path program 1 times [2021-11-12 23:30:44,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:44,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789191804] [2021-11-12 23:30:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:44,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:44,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:44,739 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:44,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:30:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:45,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:30:45,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:30:45,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:30:46,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:46,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789191804] [2021-11-12 23:30:46,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789191804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:46,054 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:46,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:30:46,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867712044] [2021-11-12 23:30:46,057 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:46,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:30:46,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:46,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:30:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:30:46,097 INFO L87 Difference]: Start difference. First operand has 524 states, 412 states have (on average 1.7111650485436893) internal successors, (705), 433 states have internal predecessors, (705), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-12 23:30:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:46,201 INFO L93 Difference]: Finished difference Result 545 states and 913 transitions. [2021-11-12 23:30:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:30:46,203 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2021-11-12 23:30:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:46,226 INFO L225 Difference]: With dead ends: 545 [2021-11-12 23:30:46,226 INFO L226 Difference]: Without dead ends: 516 [2021-11-12 23:30:46,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 192 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 23:30:46,233 INFO L933 BasicCegarLoop]: 874 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, 874 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:46,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 10.52ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:30:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-12 23:30:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-12 23:30:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.70935960591133) internal successors, (694), 425 states have internal predecessors, (694), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:30:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 867 transitions. [2021-11-12 23:30:46,360 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 867 transitions. Word has length 97 [2021-11-12 23:30:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:46,362 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 867 transitions. [2021-11-12 23:30:46,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-12 23:30:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 867 transitions. [2021-11-12 23:30:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:30:46,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:46,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:46,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:30:46,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:46,587 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:46,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:46,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1728523875, now seen corresponding path program 1 times [2021-11-12 23:30:46,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:46,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729166617] [2021-11-12 23:30:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:46,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:46,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:46,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:46,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:30:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:47,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:30:47,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:30:47,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:30:47,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:47,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729166617] [2021-11-12 23:30:47,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729166617] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:47,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:47,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:30:47,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212620506] [2021-11-12 23:30:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:47,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:47,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:47,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:47,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:30:47,741 INFO L87 Difference]: Start difference. First operand 516 states and 867 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:47,840 INFO L93 Difference]: Finished difference Result 1023 states and 1726 transitions. [2021-11-12 23:30:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:47,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-12 23:30:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:47,847 INFO L225 Difference]: With dead ends: 1023 [2021-11-12 23:30:47,848 INFO L226 Difference]: Without dead ends: 516 [2021-11-12 23:30:47,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 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 23:30:47,855 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 14 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.68ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:47,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2552 Invalid, 35 Unknown, 0 Unchecked, 10.68ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 36.24ms Time] [2021-11-12 23:30:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-12 23:30:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-12 23:30:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.706896551724138) internal successors, (693), 425 states have internal predecessors, (693), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:30:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 866 transitions. [2021-11-12 23:30:47,913 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 866 transitions. Word has length 99 [2021-11-12 23:30:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:47,914 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 866 transitions. [2021-11-12 23:30:47,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 866 transitions. [2021-11-12 23:30:47,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 23:30:47,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:47,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:47,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:48,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:48,142 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:48,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:48,142 INFO L85 PathProgramCache]: Analyzing trace with hash -826883435, now seen corresponding path program 1 times [2021-11-12 23:30:48,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:48,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932740214] [2021-11-12 23:30:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:48,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:48,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:48,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:30:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:30:48,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:30:48,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:30:49,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:49,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932740214] [2021-11-12 23:30:49,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932740214] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:49,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:49,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:30:49,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207075987] [2021-11-12 23:30:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:49,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:49,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:30:49,271 INFO L87 Difference]: Start difference. First operand 516 states and 866 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:49,355 INFO L93 Difference]: Finished difference Result 1023 states and 1724 transitions. [2021-11-12 23:30:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:49,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-11-12 23:30:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:49,362 INFO L225 Difference]: With dead ends: 1023 [2021-11-12 23:30:49,362 INFO L226 Difference]: Without dead ends: 516 [2021-11-12 23:30:49,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 196 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 23:30:49,366 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 12 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.63ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:49,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2552 Invalid, 33 Unknown, 0 Unchecked, 7.63ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 36.01ms Time] [2021-11-12 23:30:49,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-12 23:30:49,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-12 23:30:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.7044334975369457) internal successors, (692), 425 states have internal predecessors, (692), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:30:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 865 transitions. [2021-11-12 23:30:49,397 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 865 transitions. Word has length 101 [2021-11-12 23:30:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:49,398 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 865 transitions. [2021-11-12 23:30:49,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 865 transitions. [2021-11-12 23:30:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:30:49,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:49,402 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:49,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:49,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:49,618 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash 834246499, now seen corresponding path program 1 times [2021-11-12 23:30:49,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:49,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013725449] [2021-11-12 23:30:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:49,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:49,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:49,622 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:49,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:30:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:50,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:30:50,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:30:50,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:30:50,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:50,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013725449] [2021-11-12 23:30:50,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013725449] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:50,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:50,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:30:50,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032028559] [2021-11-12 23:30:50,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:50,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:50,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:30:50,699 INFO L87 Difference]: Start difference. First operand 516 states and 865 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:50,796 INFO L93 Difference]: Finished difference Result 1027 states and 1727 transitions. [2021-11-12 23:30:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:30:50,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2021-11-12 23:30:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:50,803 INFO L225 Difference]: With dead ends: 1027 [2021-11-12 23:30:50,804 INFO L226 Difference]: Without dead ends: 522 [2021-11-12 23:30:50,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 200 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 23:30:50,808 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 13 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.89ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:50,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2552 Invalid, 35 Unknown, 0 Unchecked, 6.89ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 36.59ms Time] [2021-11-12 23:30:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-12 23:30:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2021-11-12 23:30:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 411 states have (on average 1.6958637469586375) internal successors, (697), 430 states have internal predecessors, (697), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:30:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 870 transitions. [2021-11-12 23:30:50,841 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 870 transitions. Word has length 103 [2021-11-12 23:30:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:50,842 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 870 transitions. [2021-11-12 23:30:50,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 870 transitions. [2021-11-12 23:30:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:30:50,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:50,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:50,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-12 23:30:51,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:51,070 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:51,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1162426420, now seen corresponding path program 1 times [2021-11-12 23:30:51,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:51,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618923475] [2021-11-12 23:30:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:51,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:51,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:51,073 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:51,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:30:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:30:51,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:30:51,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:30:52,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:52,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618923475] [2021-11-12 23:30:52,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618923475] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:52,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:52,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:30:52,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325229454] [2021-11-12 23:30:52,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:52,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:52,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:52,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:52,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:30:52,102 INFO L87 Difference]: Start difference. First operand 522 states and 870 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:52,172 INFO L93 Difference]: Finished difference Result 1026 states and 1718 transitions. [2021-11-12 23:30:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-11-12 23:30:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:52,178 INFO L225 Difference]: With dead ends: 1026 [2021-11-12 23:30:52,178 INFO L226 Difference]: Without dead ends: 522 [2021-11-12 23:30:52,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 202 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 23:30:52,182 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 8 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2553 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.91ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:52,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2553 Invalid, 30 Unknown, 0 Unchecked, 5.91ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 27.36ms Time] [2021-11-12 23:30:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-12 23:30:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2021-11-12 23:30:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 411 states have (on average 1.6934306569343065) internal successors, (696), 430 states have internal predecessors, (696), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:30:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 869 transitions. [2021-11-12 23:30:52,209 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 869 transitions. Word has length 104 [2021-11-12 23:30:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:52,210 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 869 transitions. [2021-11-12 23:30:52,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 869 transitions. [2021-11-12 23:30:52,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 23:30:52,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:52,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:52,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:52,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:52,427 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash -176244601, now seen corresponding path program 1 times [2021-11-12 23:30:52,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:52,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485490629] [2021-11-12 23:30:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:52,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:52,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:52,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:52,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:30:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:52,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:30:52,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:30:53,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:30:53,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:53,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485490629] [2021-11-12 23:30:53,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485490629] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:53,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:53,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:30:53,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027227982] [2021-11-12 23:30:53,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:53,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:53,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:53,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:30:53,446 INFO L87 Difference]: Start difference. First operand 522 states and 869 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:53,519 INFO L93 Difference]: Finished difference Result 1026 states and 1717 transitions. [2021-11-12 23:30:53,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:53,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-11-12 23:30:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:53,526 INFO L225 Difference]: With dead ends: 1026 [2021-11-12 23:30:53,526 INFO L226 Difference]: Without dead ends: 522 [2021-11-12 23:30:53,529 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 23:30:53,530 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 6 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2553 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:53,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2553 Invalid, 28 Unknown, 0 Unchecked, 6.03ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 29.27ms Time] [2021-11-12 23:30:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-12 23:30:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2021-11-12 23:30:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 411 states have (on average 1.6909975669099757) internal successors, (695), 430 states have internal predecessors, (695), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:30:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 868 transitions. [2021-11-12 23:30:53,557 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 868 transitions. Word has length 105 [2021-11-12 23:30:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:53,557 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 868 transitions. [2021-11-12 23:30:53,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 868 transitions. [2021-11-12 23:30:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 23:30:53,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:53,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:53,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 23:30:53,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:53,778 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:53,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:53,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1210846416, now seen corresponding path program 1 times [2021-11-12 23:30:53,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:53,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968922523] [2021-11-12 23:30:53,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:53,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:53,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:53,781 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:53,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:30:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:54,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:30:54,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:54,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:30:55,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:55,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968922523] [2021-11-12 23:30:55,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968922523] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:55,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:55,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:30:55,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915518223] [2021-11-12 23:30:55,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:55,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:30:55,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:55,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:30:55,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:30:55,058 INFO L87 Difference]: Start difference. First operand 522 states and 868 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:30:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:55,290 INFO L93 Difference]: Finished difference Result 1043 states and 1745 transitions. [2021-11-12 23:30:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-11-12 23:30:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:55,299 INFO L225 Difference]: With dead ends: 1043 [2021-11-12 23:30:55,299 INFO L226 Difference]: Without dead ends: 543 [2021-11-12 23:30:55,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 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 23:30:55,303 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 148 mSDsluCounter, 4153 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5005 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:55,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5005 Invalid, 85 Unknown, 0 Unchecked, 12.61ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 161.53ms Time] [2021-11-12 23:30:55,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-12 23:30:55,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 541. [2021-11-12 23:30:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 427 states have (on average 1.6885245901639345) internal successors, (721), 448 states have internal predecessors, (721), 90 states have call successors, (90), 22 states have call predecessors, (90), 23 states have return successors, (88), 83 states have call predecessors, (88), 85 states have call successors, (88) [2021-11-12 23:30:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 899 transitions. [2021-11-12 23:30:55,334 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 899 transitions. Word has length 106 [2021-11-12 23:30:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:55,335 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 899 transitions. [2021-11-12 23:30:55,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:30:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 899 transitions. [2021-11-12 23:30:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 23:30:55,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:55,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:55,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:55,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:55,560 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:55,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:55,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1596213199, now seen corresponding path program 1 times [2021-11-12 23:30:55,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:55,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734439126] [2021-11-12 23:30:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:55,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:55,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:55,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:55,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:30:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:30:56,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:30:56,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:30:56,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:56,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734439126] [2021-11-12 23:30:56,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734439126] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:56,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:56,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:30:56,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553191160] [2021-11-12 23:30:56,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:56,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:56,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:56,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:56,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:30:56,539 INFO L87 Difference]: Start difference. First operand 541 states and 899 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:56,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:56,616 INFO L93 Difference]: Finished difference Result 1056 states and 1767 transitions. [2021-11-12 23:30:56,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:30:56,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-11-12 23:30:56,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:56,622 INFO L225 Difference]: With dead ends: 1056 [2021-11-12 23:30:56,622 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 23:30:56,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 207 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 23:30:56,626 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 8 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.74ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:56,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2552 Invalid, 30 Unknown, 0 Unchecked, 5.74ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 32.38ms Time] [2021-11-12 23:30:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 23:30:56,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 23:30:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 425 states have (on average 1.6894117647058824) internal successors, (718), 445 states have internal predecessors, (718), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-12 23:30:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 892 transitions. [2021-11-12 23:30:56,662 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 892 transitions. Word has length 106 [2021-11-12 23:30:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:56,662 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 892 transitions. [2021-11-12 23:30:56,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 892 transitions. [2021-11-12 23:30:56,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:30:56,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:56,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:56,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:56,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:56,886 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1734576698, now seen corresponding path program 1 times [2021-11-12 23:30:56,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:56,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067152976] [2021-11-12 23:30:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:56,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:56,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:56,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:56,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:30:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:30:57,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:57,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:30:57,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:57,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067152976] [2021-11-12 23:30:57,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067152976] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:57,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:57,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:30:57,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874520120] [2021-11-12 23:30:57,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:57,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:57,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:57,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:57,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:30:57,977 INFO L87 Difference]: Start difference. First operand 537 states and 892 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:58,173 INFO L93 Difference]: Finished difference Result 1082 states and 1812 transitions. [2021-11-12 23:30:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2021-11-12 23:30:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:58,180 INFO L225 Difference]: With dead ends: 1082 [2021-11-12 23:30:58,180 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 23:30:58,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 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 23:30:58,185 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 134 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.21ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:58,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2360 Invalid, 131 Unknown, 0 Unchecked, 7.21ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 147.84ms Time] [2021-11-12 23:30:58,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 23:30:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 23:30:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 425 states have (on average 1.6776470588235295) internal successors, (713), 445 states have internal predecessors, (713), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-12 23:30:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 887 transitions. [2021-11-12 23:30:58,212 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 887 transitions. Word has length 107 [2021-11-12 23:30:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:58,212 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 887 transitions. [2021-11-12 23:30:58,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 887 transitions. [2021-11-12 23:30:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:30:58,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:58,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:58,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-12 23:30:58,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:58,434 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:58,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:58,435 INFO L85 PathProgramCache]: Analyzing trace with hash 994765132, now seen corresponding path program 1 times [2021-11-12 23:30:58,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:58,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505036676] [2021-11-12 23:30:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:58,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:58,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:58,442 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:58,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:30:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:58,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:30:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:59,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:30:59,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:59,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505036676] [2021-11-12 23:30:59,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505036676] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:59,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:59,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:30:59,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371474664] [2021-11-12 23:30:59,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:59,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:59,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:30:59,572 INFO L87 Difference]: Start difference. First operand 537 states and 887 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:59,782 INFO L93 Difference]: Finished difference Result 1082 states and 1802 transitions. [2021-11-12 23:30:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:59,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2021-11-12 23:30:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:59,790 INFO L225 Difference]: With dead ends: 1082 [2021-11-12 23:30:59,790 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 23:30:59,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 212 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 23:30:59,794 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 128 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.68ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:59,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2360 Invalid, 121 Unknown, 0 Unchecked, 7.68ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 161.82ms Time] [2021-11-12 23:30:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 23:30:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 23:30:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 425 states have (on average 1.6658823529411764) internal successors, (708), 445 states have internal predecessors, (708), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-12 23:30:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 882 transitions. [2021-11-12 23:30:59,820 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 882 transitions. Word has length 109 [2021-11-12 23:30:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:59,821 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 882 transitions. [2021-11-12 23:30:59,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:30:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 882 transitions. [2021-11-12 23:30:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:30:59,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:59,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:59,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:00,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:00,051 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:00,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:00,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1474622438, now seen corresponding path program 1 times [2021-11-12 23:31:00,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:00,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35013472] [2021-11-12 23:31:00,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:00,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:00,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:00,054 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:00,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:31:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:31:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:00,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:31:01,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:01,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35013472] [2021-11-12 23:31:01,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35013472] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:01,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:31:01,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:31:01,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759361376] [2021-11-12 23:31:01,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:01,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:31:01,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:01,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:31:01,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:31:01,151 INFO L87 Difference]: Start difference. First operand 537 states and 882 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:31:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:01,339 INFO L93 Difference]: Finished difference Result 1103 states and 1823 transitions. [2021-11-12 23:31:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:31:01,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-11-12 23:31:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:01,346 INFO L225 Difference]: With dead ends: 1103 [2021-11-12 23:31:01,346 INFO L226 Difference]: Without dead ends: 567 [2021-11-12 23:31:01,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 216 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 23:31:01,350 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 143 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2370 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.46ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:01,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2370 Invalid, 131 Unknown, 0 Unchecked, 5.46ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 145.30ms Time] [2021-11-12 23:31:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-12 23:31:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 552. [2021-11-12 23:31:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 440 states have (on average 1.643181818181818) internal successors, (723), 459 states have internal predecessors, (723), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 896 transitions. [2021-11-12 23:31:01,374 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 896 transitions. Word has length 111 [2021-11-12 23:31:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:01,375 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 896 transitions. [2021-11-12 23:31:01,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:31:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 896 transitions. [2021-11-12 23:31:01,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:31:01,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:01,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:01,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:01,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:01,594 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:01,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1074440038, now seen corresponding path program 1 times [2021-11-12 23:31:01,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:01,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636608906] [2021-11-12 23:31:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:01,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:01,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:01,597 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:01,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:31:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:02,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:31:02,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:02,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:02,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:02,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636608906] [2021-11-12 23:31:02,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636608906] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:02,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:31:02,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:31:02,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425047289] [2021-11-12 23:31:02,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:02,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:31:02,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:02,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:31:02,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:31:02,689 INFO L87 Difference]: Start difference. First operand 552 states and 896 transitions. Second operand has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:31:02,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:02,872 INFO L93 Difference]: Finished difference Result 1067 states and 1744 transitions. [2021-11-12 23:31:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:02,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-11-12 23:31:02,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:02,879 INFO L225 Difference]: With dead ends: 1067 [2021-11-12 23:31:02,879 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 23:31:02,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:31:02,884 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 131 mSDsluCounter, 4118 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 4973 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.93ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:02,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 4973 Invalid, 75 Unknown, 0 Unchecked, 10.93ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 120.94ms Time] [2021-11-12 23:31:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 23:31:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 531. [2021-11-12 23:31:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 419 states have (on average 1.6372315035799523) internal successors, (686), 438 states have internal predecessors, (686), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 859 transitions. [2021-11-12 23:31:02,911 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 859 transitions. Word has length 111 [2021-11-12 23:31:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:02,912 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 859 transitions. [2021-11-12 23:31:02,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:31:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 859 transitions. [2021-11-12 23:31:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:31:02,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:02,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:02,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:03,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:03,138 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:03,138 INFO L85 PathProgramCache]: Analyzing trace with hash -709042707, now seen corresponding path program 1 times [2021-11-12 23:31:03,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:03,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122407100] [2021-11-12 23:31:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:03,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:03,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:03,140 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:03,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:31:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:03,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:31:03,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:03,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:31:04,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:04,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122407100] [2021-11-12 23:31:04,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122407100] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:04,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:31:04,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:31:04,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275432201] [2021-11-12 23:31:04,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:04,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:31:04,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:31:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:31:04,081 INFO L87 Difference]: Start difference. First operand 531 states and 859 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:31:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:04,208 INFO L93 Difference]: Finished difference Result 1031 states and 1682 transitions. [2021-11-12 23:31:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:31:04,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-11-12 23:31:04,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:04,237 INFO L225 Difference]: With dead ends: 1031 [2021-11-12 23:31:04,238 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 23:31:04,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 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 23:31:04,243 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 69 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2384 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:04,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2384 Invalid, 54 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 93.91ms Time] [2021-11-12 23:31:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 23:31:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 23:31:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 419 states have (on average 1.6348448687350836) internal successors, (685), 438 states have internal predecessors, (685), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 858 transitions. [2021-11-12 23:31:04,266 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 858 transitions. Word has length 112 [2021-11-12 23:31:04,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:04,266 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 858 transitions. [2021-11-12 23:31:04,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:31:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 858 transitions. [2021-11-12 23:31:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:31:04,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:04,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:04,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:04,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:04,497 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:04,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2061438113, now seen corresponding path program 1 times [2021-11-12 23:31:04,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:04,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365807443] [2021-11-12 23:31:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:04,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:04,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:04,499 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:04,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:31:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:04,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:31:04,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:05,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:31:05,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:05,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365807443] [2021-11-12 23:31:05,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365807443] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:05,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:31:05,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:31:05,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732522758] [2021-11-12 23:31:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:05,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:31:05,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:31:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:31:05,497 INFO L87 Difference]: Start difference. First operand 531 states and 858 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:31:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:05,609 INFO L93 Difference]: Finished difference Result 1031 states and 1681 transitions. [2021-11-12 23:31:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:31:05,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2021-11-12 23:31:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:05,615 INFO L225 Difference]: With dead ends: 1031 [2021-11-12 23:31:05,615 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 23:31:05,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 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 23:31:05,619 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 67 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2384 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:05,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2384 Invalid, 52 Unknown, 0 Unchecked, 4.01ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 82.31ms Time] [2021-11-12 23:31:05,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 23:31:05,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 23:31:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 419 states have (on average 1.6324582338902147) internal successors, (684), 438 states have internal predecessors, (684), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 857 transitions. [2021-11-12 23:31:05,641 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 857 transitions. Word has length 113 [2021-11-12 23:31:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:05,641 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 857 transitions. [2021-11-12 23:31:05,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:31:05,642 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 857 transitions. [2021-11-12 23:31:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:31:05,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:05,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:05,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:05,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:05,863 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:05,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:05,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1912490246, now seen corresponding path program 1 times [2021-11-12 23:31:05,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:05,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159934978] [2021-11-12 23:31:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:05,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:05,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:05,865 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:05,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:31:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:06,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:31:06,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:06,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:31:06,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:06,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159934978] [2021-11-12 23:31:06,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159934978] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:06,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:31:06,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:31:06,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983111933] [2021-11-12 23:31:06,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:06,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:31:06,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:06,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:31:06,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:31:06,891 INFO L87 Difference]: Start difference. First operand 531 states and 857 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:31:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:07,020 INFO L93 Difference]: Finished difference Result 1031 states and 1680 transitions. [2021-11-12 23:31:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:31:07,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-11-12 23:31:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:07,026 INFO L225 Difference]: With dead ends: 1031 [2021-11-12 23:31:07,027 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 23:31:07,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 223 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 23:31:07,032 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 114 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2354 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.49ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:07,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 2354 Invalid, 42 Unknown, 0 Unchecked, 4.49ms Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 94.74ms Time] [2021-11-12 23:31:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 23:31:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 23:31:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 419 states have (on average 1.630071599045346) internal successors, (683), 438 states have internal predecessors, (683), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 856 transitions. [2021-11-12 23:31:07,057 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 856 transitions. Word has length 114 [2021-11-12 23:31:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:07,058 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 856 transitions. [2021-11-12 23:31:07,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:31:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 856 transitions. [2021-11-12 23:31:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:31:07,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:07,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:07,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:07,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:07,283 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:07,284 INFO L85 PathProgramCache]: Analyzing trace with hash -503346104, now seen corresponding path program 1 times [2021-11-12 23:31:07,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:07,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783128424] [2021-11-12 23:31:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:07,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:07,287 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:07,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:31:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:07,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:31:07,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:08,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:08,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:08,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783128424] [2021-11-12 23:31:08,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783128424] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:08,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:31:08,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:31:08,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368355822] [2021-11-12 23:31:08,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:08,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:31:08,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:08,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:31:08,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:08,771 INFO L87 Difference]: Start difference. First operand 531 states and 856 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:31:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:09,052 INFO L93 Difference]: Finished difference Result 1036 states and 1687 transitions. [2021-11-12 23:31:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:31:09,054 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 114 [2021-11-12 23:31:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:09,059 INFO L225 Difference]: With dead ends: 1036 [2021-11-12 23:31:09,059 INFO L226 Difference]: Without dead ends: 542 [2021-11-12 23:31:09,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:31:09,063 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 108 mSDsluCounter, 4725 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 5523 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.01ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 200.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:09,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 5523 Invalid, 152 Unknown, 0 Unchecked, 8.01ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 200.80ms Time] [2021-11-12 23:31:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-12 23:31:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 533. [2021-11-12 23:31:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 421 states have (on average 1.6247030878859858) internal successors, (684), 440 states have internal predecessors, (684), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 857 transitions. [2021-11-12 23:31:09,091 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 857 transitions. Word has length 114 [2021-11-12 23:31:09,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:09,091 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 857 transitions. [2021-11-12 23:31:09,093 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:31:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 857 transitions. [2021-11-12 23:31:09,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 23:31:09,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:09,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:09,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:09,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:09,310 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:09,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1974460044, now seen corresponding path program 1 times [2021-11-12 23:31:09,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:09,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863203394] [2021-11-12 23:31:09,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:09,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:09,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:09,312 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:09,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:31:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:31:09,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:10,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:10,672 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:10,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863203394] [2021-11-12 23:31:10,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863203394] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:10,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:31:10,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:31:10,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770485039] [2021-11-12 23:31:10,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:10,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:31:10,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:10,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:31:10,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:10,674 INFO L87 Difference]: Start difference. First operand 533 states and 857 transitions. Second operand has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:31:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:10,996 INFO L93 Difference]: Finished difference Result 1028 states and 1668 transitions. [2021-11-12 23:31:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:31:10,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2021-11-12 23:31:10,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:11,004 INFO L225 Difference]: With dead ends: 1028 [2021-11-12 23:31:11,004 INFO L226 Difference]: Without dead ends: 538 [2021-11-12 23:31:11,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:31:11,010 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 76 mSDsluCounter, 4731 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 204.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 5531 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:11,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 5531 Invalid, 152 Unknown, 0 Unchecked, 10.51ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 226.47ms Time] [2021-11-12 23:31:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-12 23:31:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 535. [2021-11-12 23:31:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 423 states have (on average 1.6193853427895981) internal successors, (685), 442 states have internal predecessors, (685), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 858 transitions. [2021-11-12 23:31:11,041 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 858 transitions. Word has length 115 [2021-11-12 23:31:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:11,042 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 858 transitions. [2021-11-12 23:31:11,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:31:11,043 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 858 transitions. [2021-11-12 23:31:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:31:11,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:11,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:11,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:11,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:11,274 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:11,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:11,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1728976658, now seen corresponding path program 1 times [2021-11-12 23:31:11,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:11,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106458897] [2021-11-12 23:31:11,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:11,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:11,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:11,278 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:11,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:31:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:11,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:31:11,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:12,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:12,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:12,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106458897] [2021-11-12 23:31:12,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106458897] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:12,588 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:12,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:31:12,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233542323] [2021-11-12 23:31:12,589 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:12,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:31:12,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:12,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:31:12,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:31:12,591 INFO L87 Difference]: Start difference. First operand 535 states and 858 transitions. Second operand has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:12,791 INFO L93 Difference]: Finished difference Result 974 states and 1595 transitions. [2021-11-12 23:31:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:31:12,793 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 116 [2021-11-12 23:31:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:12,798 INFO L225 Difference]: With dead ends: 974 [2021-11-12 23:31:12,798 INFO L226 Difference]: Without dead ends: 528 [2021-11-12 23:31:12,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 222 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 23:31:12,802 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 107 mSDsluCounter, 4853 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 5665 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.99ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:12,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 5665 Invalid, 106 Unknown, 0 Unchecked, 7.99ms Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 146.13ms Time] [2021-11-12 23:31:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-11-12 23:31:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2021-11-12 23:31:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 416 states have (on average 1.6274038461538463) internal successors, (677), 435 states have internal predecessors, (677), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 850 transitions. [2021-11-12 23:31:12,828 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 850 transitions. Word has length 116 [2021-11-12 23:31:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:12,829 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 850 transitions. [2021-11-12 23:31:12,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 850 transitions. [2021-11-12 23:31:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 23:31:12,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:12,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:12,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:13,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:13,057 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:13,058 INFO L85 PathProgramCache]: Analyzing trace with hash -415763854, now seen corresponding path program 1 times [2021-11-12 23:31:13,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:13,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353393784] [2021-11-12 23:31:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:13,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:13,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:13,060 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:13,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:31:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:13,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:31:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:13,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:14,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:14,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353393784] [2021-11-12 23:31:14,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353393784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:14,422 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:14,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:31:14,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218915005] [2021-11-12 23:31:14,423 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:14,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:31:14,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:14,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:31:14,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:31:14,425 INFO L87 Difference]: Start difference. First operand 528 states and 850 transitions. Second operand has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:14,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:14,575 INFO L93 Difference]: Finished difference Result 979 states and 1609 transitions. [2021-11-12 23:31:14,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:14,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 117 [2021-11-12 23:31:14,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:14,583 INFO L225 Difference]: With dead ends: 979 [2021-11-12 23:31:14,583 INFO L226 Difference]: Without dead ends: 525 [2021-11-12 23:31:14,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 224 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 23:31:14,587 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 167 mSDsluCounter, 4003 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 4807 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:14,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 4807 Invalid, 79 Unknown, 0 Unchecked, 6.27ms Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 103.26ms Time] [2021-11-12 23:31:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-12 23:31:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-12 23:31:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 413 states have (on average 1.6271186440677967) internal successors, (672), 432 states have internal predecessors, (672), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 845 transitions. [2021-11-12 23:31:14,614 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 845 transitions. Word has length 117 [2021-11-12 23:31:14,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:14,614 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 845 transitions. [2021-11-12 23:31:14,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 845 transitions. [2021-11-12 23:31:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 23:31:14,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:14,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:14,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:14,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:14,843 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:14,843 INFO L85 PathProgramCache]: Analyzing trace with hash 922439410, now seen corresponding path program 1 times [2021-11-12 23:31:14,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:14,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473243277] [2021-11-12 23:31:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:14,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:14,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:14,845 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:14,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:31:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:15,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:31:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:15,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:16,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:16,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473243277] [2021-11-12 23:31:16,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473243277] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:16,047 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:16,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:31:16,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810757828] [2021-11-12 23:31:16,048 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:16,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:31:16,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:31:16,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:31:16,050 INFO L87 Difference]: Start difference. First operand 525 states and 845 transitions. Second operand has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:31:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:16,222 INFO L93 Difference]: Finished difference Result 976 states and 1604 transitions. [2021-11-12 23:31:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:16,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 117 [2021-11-12 23:31:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:16,227 INFO L225 Difference]: With dead ends: 976 [2021-11-12 23:31:16,228 INFO L226 Difference]: Without dead ends: 517 [2021-11-12 23:31:16,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:31:16,233 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 103 mSDsluCounter, 3954 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 4757 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.45ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:16,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 4757 Invalid, 68 Unknown, 0 Unchecked, 5.45ms Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 116.34ms Time] [2021-11-12 23:31:16,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-12 23:31:16,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2021-11-12 23:31:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 405 states have (on average 1.6320987654320989) internal successors, (661), 424 states have internal predecessors, (661), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 834 transitions. [2021-11-12 23:31:16,258 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 834 transitions. Word has length 117 [2021-11-12 23:31:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:16,258 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 834 transitions. [2021-11-12 23:31:16,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:31:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 834 transitions. [2021-11-12 23:31:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 23:31:16,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:16,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:16,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:16,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:16,478 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash -975548874, now seen corresponding path program 1 times [2021-11-12 23:31:16,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:16,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180810284] [2021-11-12 23:31:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:16,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:16,480 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:16,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:31:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:16,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:31:16,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:17,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:17,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:17,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180810284] [2021-11-12 23:31:17,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180810284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:17,564 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:17,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:31:17,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331810920] [2021-11-12 23:31:17,564 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:17,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:31:17,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:17,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:31:17,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:17,566 INFO L87 Difference]: Start difference. First operand 517 states and 834 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:17,773 INFO L93 Difference]: Finished difference Result 962 states and 1582 transitions. [2021-11-12 23:31:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:31:17,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 118 [2021-11-12 23:31:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:17,780 INFO L225 Difference]: With dead ends: 962 [2021-11-12 23:31:17,780 INFO L226 Difference]: Without dead ends: 517 [2021-11-12 23:31:17,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:31:17,784 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 67 mSDsluCounter, 7836 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 8635 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.36ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:17,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 8635 Invalid, 160 Unknown, 0 Unchecked, 8.36ms Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 153.24ms Time] [2021-11-12 23:31:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-12 23:31:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2021-11-12 23:31:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 405 states have (on average 1.6296296296296295) internal successors, (660), 424 states have internal predecessors, (660), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 833 transitions. [2021-11-12 23:31:17,807 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 833 transitions. Word has length 118 [2021-11-12 23:31:17,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:17,807 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 833 transitions. [2021-11-12 23:31:17,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 833 transitions. [2021-11-12 23:31:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:31:17,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:17,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:17,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:18,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:18,032 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1493237008, now seen corresponding path program 1 times [2021-11-12 23:31:18,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:18,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989424654] [2021-11-12 23:31:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:18,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:18,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:18,035 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:18,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:31:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:18,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:31:18,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:18,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:19,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:19,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989424654] [2021-11-12 23:31:19,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989424654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:19,308 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:19,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:31:19,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554406810] [2021-11-12 23:31:19,308 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:19,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:31:19,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:19,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:31:19,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:19,310 INFO L87 Difference]: Start difference. First operand 517 states and 833 transitions. Second operand has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:19,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:19,545 INFO L93 Difference]: Finished difference Result 1006 states and 1639 transitions. [2021-11-12 23:31:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:31:19,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 119 [2021-11-12 23:31:19,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:19,552 INFO L225 Difference]: With dead ends: 1006 [2021-11-12 23:31:19,552 INFO L226 Difference]: Without dead ends: 514 [2021-11-12 23:31:19,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 227 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 23:31:19,556 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 100 mSDsluCounter, 7765 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 149.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 8552 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.83ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:19,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 8552 Invalid, 153 Unknown, 0 Unchecked, 8.83ms Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 168.94ms Time] [2021-11-12 23:31:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-12 23:31:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-11-12 23:31:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 402 states have (on average 1.6218905472636815) internal successors, (652), 421 states have internal predecessors, (652), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 825 transitions. [2021-11-12 23:31:19,577 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 825 transitions. Word has length 119 [2021-11-12 23:31:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:19,578 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 825 transitions. [2021-11-12 23:31:19,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 825 transitions. [2021-11-12 23:31:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:31:19,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:19,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:19,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:19,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:19,798 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1504374149, now seen corresponding path program 1 times [2021-11-12 23:31:19,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:19,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100746016] [2021-11-12 23:31:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:19,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:19,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:19,800 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:19,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:31:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:20,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:31:20,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:20,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:21,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:21,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100746016] [2021-11-12 23:31:21,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100746016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:21,155 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:21,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:31:21,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867659836] [2021-11-12 23:31:21,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:21,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:31:21,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:21,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:31:21,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:21,156 INFO L87 Difference]: Start difference. First operand 514 states and 825 transitions. Second operand has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:21,339 INFO L93 Difference]: Finished difference Result 953 states and 1562 transitions. [2021-11-12 23:31:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:31:21,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 120 [2021-11-12 23:31:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:21,343 INFO L225 Difference]: With dead ends: 953 [2021-11-12 23:31:21,343 INFO L226 Difference]: Without dead ends: 514 [2021-11-12 23:31:21,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:31:21,346 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 98 mSDsluCounter, 4689 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.03ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:21,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 5477 Invalid, 117 Unknown, 0 Unchecked, 5.03ms Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 128.92ms Time] [2021-11-12 23:31:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-12 23:31:21,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-11-12 23:31:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 402 states have (on average 1.6194029850746268) internal successors, (651), 421 states have internal predecessors, (651), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 824 transitions. [2021-11-12 23:31:21,364 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 824 transitions. Word has length 120 [2021-11-12 23:31:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:21,364 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 824 transitions. [2021-11-12 23:31:21,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 824 transitions. [2021-11-12 23:31:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 23:31:21,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:21,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:21,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-12 23:31:21,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:21,588 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:21,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2142726719, now seen corresponding path program 1 times [2021-11-12 23:31:21,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:21,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939255846] [2021-11-12 23:31:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:21,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:21,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:21,590 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:21,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:31:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:22,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:31:22,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:22,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:31:22,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:22,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939255846] [2021-11-12 23:31:22,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939255846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:22,833 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:22,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:31:22,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170646637] [2021-11-12 23:31:22,834 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:22,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:31:22,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:22,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:31:22,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:22,835 INFO L87 Difference]: Start difference. First operand 514 states and 824 transitions. Second operand has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:23,101 INFO L93 Difference]: Finished difference Result 991 states and 1607 transitions. [2021-11-12 23:31:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:31:23,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 121 [2021-11-12 23:31:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:23,109 INFO L225 Difference]: With dead ends: 991 [2021-11-12 23:31:23,110 INFO L226 Difference]: Without dead ends: 511 [2021-11-12 23:31:23,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 230 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 23:31:23,114 INFO L933 BasicCegarLoop]: 786 mSDtfsCounter, 93 mSDsluCounter, 5443 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 6229 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.07ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:23,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 6229 Invalid, 119 Unknown, 0 Unchecked, 8.07ms Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 161.90ms Time] [2021-11-12 23:31:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-12 23:31:23,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2021-11-12 23:31:23,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 399 states have (on average 1.6115288220551378) internal successors, (643), 418 states have internal predecessors, (643), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-12 23:31:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 816 transitions. [2021-11-12 23:31:23,142 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 816 transitions. Word has length 121 [2021-11-12 23:31:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:23,143 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 816 transitions. [2021-11-12 23:31:23,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:31:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 816 transitions. [2021-11-12 23:31:23,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:31:23,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:23,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:23,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:23,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:23,374 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:23,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1284823680, now seen corresponding path program 1 times [2021-11-12 23:31:23,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:23,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442648254] [2021-11-12 23:31:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:23,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:23,377 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:23,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:31:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:24,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:31:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:31:24,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:31:25,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:25,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442648254] [2021-11-12 23:31:25,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442648254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:25,673 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:25,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 23:31:25,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840557318] [2021-11-12 23:31:25,674 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:25,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:31:25,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:25,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:31:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:31:25,675 INFO L87 Difference]: Start difference. First operand 511 states and 816 transitions. Second operand has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-12 23:31:27,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:29,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:31,728 WARN L515 Checker$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 23:31:33,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:35,737 WARN L515 Checker$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 23:31:37,743 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 23:31:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:43,064 INFO L93 Difference]: Finished difference Result 1079 states and 1797 transitions. [2021-11-12 23:31:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:43,065 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) Word has length 122 [2021-11-12 23:31:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:43,070 INFO L225 Difference]: With dead ends: 1079 [2021-11-12 23:31:43,071 INFO L226 Difference]: Without dead ends: 648 [2021-11-12 23:31:43,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:31:43,074 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 1356 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 4800 mSolverCounterSat, 532 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16462.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 4090 SdHoareTripleChecker+Invalid, 5338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.62ms SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 4800 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17165.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:43,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 4090 Invalid, 5338 Unknown, 0 Unchecked, 38.62ms Time], IncrementalHoareTripleChecker [532 Valid, 4800 Invalid, 6 Unknown, 0 Unchecked, 17165.59ms Time] [2021-11-12 23:31:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-12 23:31:43,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 515. [2021-11-12 23:31:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 402 states have (on average 1.6069651741293531) internal successors, (646), 421 states have internal predecessors, (646), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (100), 83 states have call predecessors, (100), 84 states have call successors, (100) [2021-11-12 23:31:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 835 transitions. [2021-11-12 23:31:43,107 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 835 transitions. Word has length 122 [2021-11-12 23:31:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:43,108 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 835 transitions. [2021-11-12 23:31:43,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-12 23:31:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 835 transitions. [2021-11-12 23:31:43,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:31:43,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:43,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:43,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:43,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:43,326 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:43,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:43,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1463513597, now seen corresponding path program 1 times [2021-11-12 23:31:43,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:43,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185002789] [2021-11-12 23:31:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:43,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:43,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:43,328 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:43,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:31:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:43,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:31:43,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:31:44,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:31:44,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:44,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185002789] [2021-11-12 23:31:44,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185002789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:44,531 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:44,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:31:44,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256753448] [2021-11-12 23:31:44,531 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:44,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:31:44,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:44,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:31:44,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:31:44,533 INFO L87 Difference]: Start difference. First operand 515 states and 835 transitions. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:31:46,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:48,587 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:50,592 WARN L515 Checker$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 23:31:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:56,946 INFO L93 Difference]: Finished difference Result 1777 states and 3042 transitions. [2021-11-12 23:31:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:31:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) Word has length 123 [2021-11-12 23:31:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:56,955 INFO L225 Difference]: With dead ends: 1777 [2021-11-12 23:31:56,955 INFO L226 Difference]: Without dead ends: 1342 [2021-11-12 23:31:56,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:31:56,960 INFO L933 BasicCegarLoop]: 1320 mSDtfsCounter, 2692 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 5144 mSolverCounterSat, 779 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11179.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2765 SdHoareTripleChecker+Valid, 4210 SdHoareTripleChecker+Invalid, 5926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.39ms SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 5144 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12041.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:56,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2765 Valid, 4210 Invalid, 5926 Unknown, 0 Unchecked, 37.39ms Time], IncrementalHoareTripleChecker [779 Valid, 5144 Invalid, 3 Unknown, 0 Unchecked, 12041.47ms Time] [2021-11-12 23:31:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-11-12 23:31:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1254. [2021-11-12 23:31:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 972 states have (on average 1.6450617283950617) internal successors, (1599), 1020 states have internal predecessors, (1599), 226 states have call successors, (226), 54 states have call predecessors, (226), 55 states have return successors, (244), 216 states have call predecessors, (244), 221 states have call successors, (244) [2021-11-12 23:31:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 2069 transitions. [2021-11-12 23:31:57,069 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 2069 transitions. Word has length 123 [2021-11-12 23:31:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:57,070 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 2069 transitions. [2021-11-12 23:31:57,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:31:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 2069 transitions. [2021-11-12 23:31:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:31:57,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:57,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:57,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:57,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:57,290 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:57,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:57,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1298418039, now seen corresponding path program 1 times [2021-11-12 23:31:57,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:57,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811027278] [2021-11-12 23:31:57,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:57,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:57,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:57,292 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:57,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:31:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:57,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:31:57,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:31:58,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:31:58,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:58,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811027278] [2021-11-12 23:31:58,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811027278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:58,500 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:58,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:31:58,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774755764] [2021-11-12 23:31:58,500 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:58,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:31:58,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:58,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:31:58,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:31:58,501 INFO L87 Difference]: Start difference. First operand 1254 states and 2069 transitions. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 23:32:00,520 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:02,526 WARN L515 Checker$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 23:32:04,531 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 23:32:10,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:10,717 INFO L93 Difference]: Finished difference Result 3414 states and 5772 transitions. [2021-11-12 23:32:10,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:32:10,718 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 125 [2021-11-12 23:32:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:10,732 INFO L225 Difference]: With dead ends: 3414 [2021-11-12 23:32:10,732 INFO L226 Difference]: Without dead ends: 2536 [2021-11-12 23:32:10,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:32:10,736 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 2593 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 4009 mSolverCounterSat, 579 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10966.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2664 SdHoareTripleChecker+Valid, 3034 SdHoareTripleChecker+Invalid, 4591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.48ms SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 4009 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11747.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:10,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2664 Valid, 3034 Invalid, 4591 Unknown, 0 Unchecked, 40.48ms Time], IncrementalHoareTripleChecker [579 Valid, 4009 Invalid, 3 Unknown, 0 Unchecked, 11747.75ms Time] [2021-11-12 23:32:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2021-11-12 23:32:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 2324. [2021-11-12 23:32:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 1803 states have (on average 1.6561286744315031) internal successors, (2986), 1896 states have internal predecessors, (2986), 410 states have call successors, (410), 94 states have call predecessors, (410), 110 states have return successors, (501), 395 states have call predecessors, (501), 405 states have call successors, (501) [2021-11-12 23:32:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3897 transitions. [2021-11-12 23:32:10,886 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3897 transitions. Word has length 125 [2021-11-12 23:32:10,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:10,887 INFO L470 AbstractCegarLoop]: Abstraction has 2324 states and 3897 transitions. [2021-11-12 23:32:10,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 23:32:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3897 transitions. [2021-11-12 23:32:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 23:32:10,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:10,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:32:10,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:11,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:11,110 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:11,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1164159281, now seen corresponding path program 1 times [2021-11-12 23:32:11,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:11,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827877215] [2021-11-12 23:32:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:11,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:11,112 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:11,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:32:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:11,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:32:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:32:12,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:32:12,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:12,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827877215] [2021-11-12 23:32:12,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827877215] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:12,957 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:12,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:32:12,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265382806] [2021-11-12 23:32:12,957 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:12,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:32:12,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:12,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:32:12,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:32:12,959 INFO L87 Difference]: Start difference. First operand 2324 states and 3897 transitions. Second operand has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-12 23:32:14,990 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 23:32:16,996 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:19,003 WARN L515 Checker$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 23:32:21,009 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 23:32:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:30,673 INFO L93 Difference]: Finished difference Result 6245 states and 10568 transitions. [2021-11-12 23:32:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:32:30,675 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) Word has length 130 [2021-11-12 23:32:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:30,700 INFO L225 Difference]: With dead ends: 6245 [2021-11-12 23:32:30,700 INFO L226 Difference]: Without dead ends: 4247 [2021-11-12 23:32:30,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:32:30,709 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 4111 mSDsluCounter, 3051 mSDsCounter, 0 mSdLazyCounter, 7318 mSolverCounterSat, 1144 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15734.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4182 SdHoareTripleChecker+Valid, 3975 SdHoareTripleChecker+Invalid, 8466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.38ms SdHoareTripleChecker+Time, 1144 IncrementalHoareTripleChecker+Valid, 7318 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16880.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:30,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4182 Valid, 3975 Invalid, 8466 Unknown, 0 Unchecked, 52.38ms Time], IncrementalHoareTripleChecker [1144 Valid, 7318 Invalid, 4 Unknown, 0 Unchecked, 16880.73ms Time] [2021-11-12 23:32:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-11-12 23:32:30,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 4085. [2021-11-12 23:32:30,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4085 states, 3157 states have (on average 1.6499841621792841) internal successors, (5209), 3317 states have internal predecessors, (5209), 728 states have call successors, (728), 170 states have call predecessors, (728), 199 states have return successors, (902), 705 states have call predecessors, (902), 723 states have call successors, (902) [2021-11-12 23:32:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4085 states to 4085 states and 6839 transitions. [2021-11-12 23:32:31,019 INFO L78 Accepts]: Start accepts. Automaton has 4085 states and 6839 transitions. Word has length 130 [2021-11-12 23:32:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:31,020 INFO L470 AbstractCegarLoop]: Abstraction has 4085 states and 6839 transitions. [2021-11-12 23:32:31,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-12 23:32:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4085 states and 6839 transitions. [2021-11-12 23:32:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:32:31,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:31,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:32:31,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:31,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:31,238 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:31,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:31,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1274589005, now seen corresponding path program 1 times [2021-11-12 23:32:31,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:31,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147680268] [2021-11-12 23:32:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:31,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:31,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:31,241 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:31,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:32:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:31,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:32:31,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:32:31,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:32:32,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:32,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147680268] [2021-11-12 23:32:32,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147680268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:32,343 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:32,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:32:32,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858250477] [2021-11-12 23:32:32,343 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:32,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:32:32,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:32,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:32:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:32:32,345 INFO L87 Difference]: Start difference. First operand 4085 states and 6839 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:32:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:32,631 INFO L93 Difference]: Finished difference Result 8110 states and 13751 transitions. [2021-11-12 23:32:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:32:32,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 137 [2021-11-12 23:32:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:32,668 INFO L225 Difference]: With dead ends: 8110 [2021-11-12 23:32:32,668 INFO L226 Difference]: Without dead ends: 4085 [2021-11-12 23:32:32,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:32:32,690 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 310 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.95ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:32,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 2251 Invalid, 84 Unknown, 0 Unchecked, 3.95ms Time], IncrementalHoareTripleChecker [27 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 85.88ms Time] [2021-11-12 23:32:32,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-11-12 23:32:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 4085. [2021-11-12 23:32:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4085 states, 3157 states have (on average 1.6303452644916059) internal successors, (5147), 3317 states have internal predecessors, (5147), 728 states have call successors, (728), 170 states have call predecessors, (728), 199 states have return successors, (902), 705 states have call predecessors, (902), 723 states have call successors, (902) [2021-11-12 23:32:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4085 states to 4085 states and 6777 transitions. [2021-11-12 23:32:32,977 INFO L78 Accepts]: Start accepts. Automaton has 4085 states and 6777 transitions. Word has length 137 [2021-11-12 23:32:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:32,978 INFO L470 AbstractCegarLoop]: Abstraction has 4085 states and 6777 transitions. [2021-11-12 23:32:32,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:32:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4085 states and 6777 transitions. [2021-11-12 23:32:32,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:32:32,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:32,982 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:32:33,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:33,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:33,204 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:33,204 INFO L85 PathProgramCache]: Analyzing trace with hash 490976588, now seen corresponding path program 1 times [2021-11-12 23:32:33,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:33,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554333274] [2021-11-12 23:32:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:33,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:33,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:33,207 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:33,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:32:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:32:33,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:32:34,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:32:34,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:34,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554333274] [2021-11-12 23:32:34,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554333274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:34,688 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:34,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 23:32:34,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289039386] [2021-11-12 23:32:34,688 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:34,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:32:34,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:34,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:32:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:32:34,690 INFO L87 Difference]: Start difference. First operand 4085 states and 6777 transitions. Second operand has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:32:36,713 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 23:32:38,720 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 23:32:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:42,428 INFO L93 Difference]: Finished difference Result 8199 states and 13670 transitions. [2021-11-12 23:32:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:32:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 142 [2021-11-12 23:32:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:42,472 INFO L225 Difference]: With dead ends: 8199 [2021-11-12 23:32:42,472 INFO L226 Difference]: Without dead ends: 4547 [2021-11-12 23:32:42,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:32:42,485 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 1973 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 3315 mSolverCounterSat, 486 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6905.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2047 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 3803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.59ms SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 3315 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7418.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:42,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2047 Valid, 2473 Invalid, 3803 Unknown, 0 Unchecked, 17.59ms Time], IncrementalHoareTripleChecker [486 Valid, 3315 Invalid, 2 Unknown, 0 Unchecked, 7418.36ms Time] [2021-11-12 23:32:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2021-11-12 23:32:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 4265. [2021-11-12 23:32:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4265 states, 3293 states have (on average 1.6182812025508655) internal successors, (5329), 3463 states have internal predecessors, (5329), 747 states have call successors, (747), 186 states have call predecessors, (747), 224 states have return successors, (945), 723 states have call predecessors, (945), 742 states have call successors, (945) [2021-11-12 23:32:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4265 states to 4265 states and 7021 transitions. [2021-11-12 23:32:42,776 INFO L78 Accepts]: Start accepts. Automaton has 4265 states and 7021 transitions. Word has length 142 [2021-11-12 23:32:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:42,776 INFO L470 AbstractCegarLoop]: Abstraction has 4265 states and 7021 transitions. [2021-11-12 23:32:42,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:32:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4265 states and 7021 transitions. [2021-11-12 23:32:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:32:42,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:42,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:42,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:42,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:42,994 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash -794296512, now seen corresponding path program 1 times [2021-11-12 23:32:42,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:42,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626677582] [2021-11-12 23:32:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:42,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:42,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:42,996 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:42,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:32:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:43,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:32:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:44,002 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 23:32:44,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:44,721 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 23:32:44,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:44,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626677582] [2021-11-12 23:32:44,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626677582] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:44,722 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:44,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:32:44,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151891029] [2021-11-12 23:32:44,722 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:44,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:32:44,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:44,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:32:44,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:32:44,726 INFO L87 Difference]: Start difference. First operand 4265 states and 7021 transitions. Second operand has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:32:46,756 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 23:32:48,763 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:50,769 WARN L515 Checker$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 23:32:52,774 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 23:32:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:59,580 INFO L93 Difference]: Finished difference Result 10766 states and 18081 transitions. [2021-11-12 23:32:59,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:32:59,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-12 23:32:59,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:59,628 INFO L225 Difference]: With dead ends: 10766 [2021-11-12 23:32:59,628 INFO L226 Difference]: Without dead ends: 6381 [2021-11-12 23:32:59,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:32:59,649 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 3246 mSDsluCounter, 2682 mSDsCounter, 0 mSdLazyCounter, 5640 mSolverCounterSat, 901 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13491.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3335 SdHoareTripleChecker+Valid, 3731 SdHoareTripleChecker+Invalid, 6545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.87ms SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 5640 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14323.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:59,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3335 Valid, 3731 Invalid, 6545 Unknown, 0 Unchecked, 28.87ms Time], IncrementalHoareTripleChecker [901 Valid, 5640 Invalid, 4 Unknown, 0 Unchecked, 14323.20ms Time] [2021-11-12 23:32:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6381 states. [2021-11-12 23:33:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6381 to 6092. [2021-11-12 23:33:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6092 states, 4694 states have (on average 1.6131231359181935) internal successors, (7572), 4946 states have internal predecessors, (7572), 1080 states have call successors, (1080), 273 states have call predecessors, (1080), 317 states have return successors, (1420), 1028 states have call predecessors, (1420), 1075 states have call successors, (1420) [2021-11-12 23:33:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6092 states to 6092 states and 10072 transitions. [2021-11-12 23:33:00,188 INFO L78 Accepts]: Start accepts. Automaton has 6092 states and 10072 transitions. Word has length 147 [2021-11-12 23:33:00,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:00,188 INFO L470 AbstractCegarLoop]: Abstraction has 6092 states and 10072 transitions. [2021-11-12 23:33:00,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:33:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 6092 states and 10072 transitions. [2021-11-12 23:33:00,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:33:00,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:00,193 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:00,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:00,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:00,407 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:00,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:00,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1829245956, now seen corresponding path program 1 times [2021-11-12 23:33:00,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:00,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213176029] [2021-11-12 23:33:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:00,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:00,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:00,409 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:00,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:33:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:01,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:33:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:33:01,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:33:02,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:02,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213176029] [2021-11-12 23:33:02,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213176029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:02,488 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:33:02,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:33:02,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931385299] [2021-11-12 23:33:02,489 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:02,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:33:02,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:33:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:33:02,490 INFO L87 Difference]: Start difference. First operand 6092 states and 10072 transitions. Second operand has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 23:33:04,514 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 23:33:06,520 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 23:33:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:13,165 INFO L93 Difference]: Finished difference Result 16241 states and 27184 transitions. [2021-11-12 23:33:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:33:13,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) Word has length 147 [2021-11-12 23:33:13,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:13,269 INFO L225 Difference]: With dead ends: 16241 [2021-11-12 23:33:13,269 INFO L226 Difference]: Without dead ends: 10581 [2021-11-12 23:33:13,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:33:13,296 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 4406 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 4655 mSolverCounterSat, 1283 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9044.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4475 SdHoareTripleChecker+Valid, 2723 SdHoareTripleChecker+Invalid, 5940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.66ms SdHoareTripleChecker+Time, 1283 IncrementalHoareTripleChecker+Valid, 4655 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9866.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:13,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4475 Valid, 2723 Invalid, 5940 Unknown, 0 Unchecked, 30.66ms Time], IncrementalHoareTripleChecker [1283 Valid, 4655 Invalid, 2 Unknown, 0 Unchecked, 9866.77ms Time] [2021-11-12 23:33:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10581 states. [2021-11-12 23:33:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10581 to 10517. [2021-11-12 23:33:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10517 states, 8097 states have (on average 1.6278868716808694) internal successors, (13181), 8513 states have internal predecessors, (13181), 1904 states have call successors, (1904), 492 states have call predecessors, (1904), 515 states have return successors, (2349), 1811 states have call predecessors, (2349), 1899 states have call successors, (2349) [2021-11-12 23:33:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10517 states to 10517 states and 17434 transitions. [2021-11-12 23:33:13,969 INFO L78 Accepts]: Start accepts. Automaton has 10517 states and 17434 transitions. Word has length 147 [2021-11-12 23:33:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:13,969 INFO L470 AbstractCegarLoop]: Abstraction has 10517 states and 17434 transitions. [2021-11-12 23:33:13,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 23:33:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10517 states and 17434 transitions. [2021-11-12 23:33:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 23:33:13,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:13,974 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:13,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:14,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:14,197 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:14,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:14,197 INFO L85 PathProgramCache]: Analyzing trace with hash -947725029, now seen corresponding path program 1 times [2021-11-12 23:33:14,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:14,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756494958] [2021-11-12 23:33:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:14,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:14,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:14,200 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:14,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:33:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:14,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:33:14,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:33:15,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:33:16,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:16,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756494958] [2021-11-12 23:33:16,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756494958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:16,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1284026234] [2021-11-12 23:33:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:16,298 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:16,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:16,301 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:16,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 23:33:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:16,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:33:16,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:33:17,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:33:17,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1284026234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:17,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814145364] [2021-11-12 23:33:17,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:17,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:33:17,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:33:17,913 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:33:17,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-12 23:33:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:33:18,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:33:18,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:33:19,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814145364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:19,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:33:19,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 9 [2021-11-12 23:33:19,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418502609] [2021-11-12 23:33:19,523 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:33:19,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:33:19,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:33:19,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:33:19,526 INFO L87 Difference]: Start difference. First operand 10517 states and 17434 transitions. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 23:33:21,563 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:23,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:25,574 WARN L515 Checker$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 23:33:31,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:31,101 INFO L93 Difference]: Finished difference Result 42192 states and 70622 transitions. [2021-11-12 23:33:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:33:31,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) Word has length 148 [2021-11-12 23:33:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:31,348 INFO L225 Difference]: With dead ends: 42192 [2021-11-12 23:33:31,348 INFO L226 Difference]: Without dead ends: 31753 [2021-11-12 23:33:31,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:33:31,395 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 2150 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 3443 mSolverCounterSat, 616 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9561.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 2441 SdHoareTripleChecker+Invalid, 4062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.83ms SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 3443 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10217.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:31,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2226 Valid, 2441 Invalid, 4062 Unknown, 0 Unchecked, 21.83ms Time], IncrementalHoareTripleChecker [616 Valid, 3443 Invalid, 3 Unknown, 0 Unchecked, 10217.35ms Time] [2021-11-12 23:33:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31753 states. [2021-11-12 23:33:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31753 to 31603. [2021-11-12 23:33:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31603 states, 24335 states have (on average 1.6266694062050544) internal successors, (39585), 25611 states have internal predecessors, (39585), 5696 states have call successors, (5696), 1469 states have call predecessors, (5696), 1571 states have return successors, (7445), 5422 states have call predecessors, (7445), 5691 states have call successors, (7445) [2021-11-12 23:33:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31603 states to 31603 states and 52726 transitions. [2021-11-12 23:33:33,741 INFO L78 Accepts]: Start accepts. Automaton has 31603 states and 52726 transitions. Word has length 148 [2021-11-12 23:33:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:33,742 INFO L470 AbstractCegarLoop]: Abstraction has 31603 states and 52726 transitions. [2021-11-12 23:33:33,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 23:33:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 31603 states and 52726 transitions. [2021-11-12 23:33:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:33:33,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:33,746 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:33,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-12 23:33:33,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:34,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:34,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:34,362 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash 400828354, now seen corresponding path program 1 times [2021-11-12 23:33:34,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:34,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760821398] [2021-11-12 23:33:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:34,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:34,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:34,367 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:34,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 23:33:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:34,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:33:34,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:33:35,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:35,454 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 23:33:35,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:35,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760821398] [2021-11-12 23:33:35,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760821398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:35,455 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:33:35,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:33:35,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897873924] [2021-11-12 23:33:35,455 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:35,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:33:35,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:35,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:33:35,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:33:35,456 INFO L87 Difference]: Start difference. First operand 31603 states and 52726 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 23:33:37,474 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 23:33:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:40,621 INFO L93 Difference]: Finished difference Result 76604 states and 128295 transitions. [2021-11-12 23:33:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:33:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 151 [2021-11-12 23:33:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:40,979 INFO L225 Difference]: With dead ends: 76604 [2021-11-12 23:33:40,979 INFO L226 Difference]: Without dead ends: 46143 [2021-11-12 23:33:41,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:33:41,142 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 463 mSDsluCounter, 3303 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2498.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 4278 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.86ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2587.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:41,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 4278 Invalid, 330 Unknown, 0 Unchecked, 6.86ms Time], IncrementalHoareTripleChecker [18 Valid, 311 Invalid, 1 Unknown, 0 Unchecked, 2587.44ms Time] [2021-11-12 23:33:41,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46143 states. [2021-11-12 23:33:44,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46143 to 45333. [2021-11-12 23:33:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45333 states, 35100 states have (on average 1.5788034188034188) internal successors, (55416), 36635 states have internal predecessors, (55416), 7717 states have call successors, (7717), 2330 states have call predecessors, (7717), 2515 states have return successors, (11696), 7267 states have call predecessors, (11696), 7712 states have call successors, (11696) [2021-11-12 23:33:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45333 states to 45333 states and 74829 transitions. [2021-11-12 23:33:44,460 INFO L78 Accepts]: Start accepts. Automaton has 45333 states and 74829 transitions. Word has length 151 [2021-11-12 23:33:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:44,461 INFO L470 AbstractCegarLoop]: Abstraction has 45333 states and 74829 transitions. [2021-11-12 23:33:44,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 23:33:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 45333 states and 74829 transitions. [2021-11-12 23:33:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:33:44,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:44,472 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:44,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:44,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:44,693 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:44,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1080100608, now seen corresponding path program 1 times [2021-11-12 23:33:44,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:44,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217941774] [2021-11-12 23:33:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:44,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:44,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:44,697 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:44,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 23:33:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:45,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:33:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:33:45,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:46,144 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 23:33:46,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:46,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217941774] [2021-11-12 23:33:46,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217941774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:46,145 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:33:46,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-11-12 23:33:46,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015330373] [2021-11-12 23:33:46,146 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:46,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:33:46,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:46,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:33:46,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:33:46,148 INFO L87 Difference]: Start difference. First operand 45333 states and 74829 transitions. Second operand has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (31), 6 states have call predecessors, (31), 5 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-12 23:33:48,171 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 23:33:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:54,125 INFO L93 Difference]: Finished difference Result 91547 states and 153668 transitions. [2021-11-12 23:33:54,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:33:54,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (31), 6 states have call predecessors, (31), 5 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) Word has length 151 [2021-11-12 23:33:54,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:54,372 INFO L225 Difference]: With dead ends: 91547 [2021-11-12 23:33:54,372 INFO L226 Difference]: Without dead ends: 47359 [2021-11-12 23:33:54,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:33:54,506 INFO L933 BasicCegarLoop]: 1065 mSDtfsCounter, 2044 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 744 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4136.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.47ms SdHoareTripleChecker+Time, 744 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4509.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:54,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2090 Valid, 2249 Invalid, 2770 Unknown, 0 Unchecked, 14.47ms Time], IncrementalHoareTripleChecker [744 Valid, 2025 Invalid, 1 Unknown, 0 Unchecked, 4509.11ms Time] [2021-11-12 23:33:54,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47359 states. [2021-11-12 23:33:57,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47359 to 34975. [2021-11-12 23:33:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34975 states, 26205 states have (on average 1.5571837435603892) internal successors, (40806), 27736 states have internal predecessors, (40806), 7117 states have call successors, (7117), 1361 states have call predecessors, (7117), 1652 states have return successors, (10255), 6777 states have call predecessors, (10255), 7112 states have call successors, (10255) [2021-11-12 23:33:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34975 states to 34975 states and 58178 transitions. [2021-11-12 23:33:57,502 INFO L78 Accepts]: Start accepts. Automaton has 34975 states and 58178 transitions. Word has length 151 [2021-11-12 23:33:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:57,502 INFO L470 AbstractCegarLoop]: Abstraction has 34975 states and 58178 transitions. [2021-11-12 23:33:57,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (31), 6 states have call predecessors, (31), 5 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-12 23:33:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 34975 states and 58178 transitions. [2021-11-12 23:33:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 23:33:57,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:57,507 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:57,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:57,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:57,718 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1591786570, now seen corresponding path program 1 times [2021-11-12 23:33:57,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:57,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35035237] [2021-11-12 23:33:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:57,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:57,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:57,720 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:57,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-12 23:33:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:58,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:58,680 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 23:33:58,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:59,047 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 23:33:59,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:59,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35035237] [2021-11-12 23:33:59,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35035237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:59,047 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:33:59,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-12 23:33:59,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061333425] [2021-11-12 23:33:59,048 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:59,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:33:59,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:33:59,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:33:59,050 INFO L87 Difference]: Start difference. First operand 34975 states and 58178 transitions. Second operand has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 23:34:01,086 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:03,093 WARN L515 Checker$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 23:34:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:06,872 INFO L93 Difference]: Finished difference Result 35485 states and 59123 transitions. [2021-11-12 23:34:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:34:06,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 154 [2021-11-12 23:34:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:07,070 INFO L225 Difference]: With dead ends: 35485 [2021-11-12 23:34:07,071 INFO L226 Difference]: Without dead ends: 35465 [2021-11-12 23:34:07,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:34:07,103 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 1047 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 92 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4866.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 2631 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.74ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5022.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:07,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 2631 Invalid, 670 Unknown, 0 Unchecked, 6.74ms Time], IncrementalHoareTripleChecker [92 Valid, 576 Invalid, 2 Unknown, 0 Unchecked, 5022.65ms Time] [2021-11-12 23:34:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35465 states. [2021-11-12 23:34:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35465 to 35112. [2021-11-12 23:34:09,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35112 states, 26321 states have (on average 1.5560958930131834) internal successors, (40958), 27844 states have internal predecessors, (40958), 7138 states have call successors, (7138), 1361 states have call predecessors, (7138), 1652 states have return successors, (10292), 6806 states have call predecessors, (10292), 7133 states have call successors, (10292) [2021-11-12 23:34:10,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35112 states to 35112 states and 58388 transitions. [2021-11-12 23:34:10,102 INFO L78 Accepts]: Start accepts. Automaton has 35112 states and 58388 transitions. Word has length 154 [2021-11-12 23:34:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:10,103 INFO L470 AbstractCegarLoop]: Abstraction has 35112 states and 58388 transitions. [2021-11-12 23:34:10,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-12 23:34:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 35112 states and 58388 transitions. [2021-11-12 23:34:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-12 23:34:10,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:10,109 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:34:10,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:10,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:34:10,325 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:10,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1510951793, now seen corresponding path program 1 times [2021-11-12 23:34:10,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:10,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475755560] [2021-11-12 23:34:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:10,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:10,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:10,328 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:10,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 23:34:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:34:10,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:11,132 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 23:34:11,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:11,477 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 23:34:11,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:34:11,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475755560] [2021-11-12 23:34:11,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475755560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:34:11,478 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:34:11,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:34:11,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714586277] [2021-11-12 23:34:11,478 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:11,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:34:11,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:11,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:34:11,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:34:11,480 INFO L87 Difference]: Start difference. First operand 35112 states and 58388 transitions. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 6 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-12 23:34:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:13,661 INFO L93 Difference]: Finished difference Result 35132 states and 58412 transitions. [2021-11-12 23:34:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:34:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 6 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 1 states have call successors, (17) Word has length 160 [2021-11-12 23:34:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:13,875 INFO L225 Difference]: With dead ends: 35132 [2021-11-12 23:34:13,875 INFO L226 Difference]: Without dead ends: 35112 [2021-11-12 23:34:13,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:34:13,901 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 37 mSDsluCounter, 3881 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4676 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.35ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:13,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 4676 Invalid, 14 Unknown, 0 Unchecked, 4.35ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 8.33ms Time] [2021-11-12 23:34:13,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35112 states. [2021-11-12 23:34:16,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35112 to 35112. [2021-11-12 23:34:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35112 states, 26321 states have (on average 1.5524486151741954) internal successors, (40862), 27844 states have internal predecessors, (40862), 7138 states have call successors, (7138), 1361 states have call predecessors, (7138), 1652 states have return successors, (10292), 6806 states have call predecessors, (10292), 7133 states have call successors, (10292) [2021-11-12 23:34:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35112 states to 35112 states and 58292 transitions. [2021-11-12 23:34:16,458 INFO L78 Accepts]: Start accepts. Automaton has 35112 states and 58292 transitions. Word has length 160 [2021-11-12 23:34:16,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:16,460 INFO L470 AbstractCegarLoop]: Abstraction has 35112 states and 58292 transitions. [2021-11-12 23:34:16,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 6 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-12 23:34:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 35112 states and 58292 transitions. [2021-11-12 23:34:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 23:34:16,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:16,465 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:34:16,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:16,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:34:16,682 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:16,682 INFO L85 PathProgramCache]: Analyzing trace with hash 730030155, now seen corresponding path program 1 times [2021-11-12 23:34:16,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:16,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611293852] [2021-11-12 23:34:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:16,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:16,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:16,684 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:16,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 23:34:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:17,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:34:17,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:34:17,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:34:19,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:34:19,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611293852] [2021-11-12 23:34:19,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611293852] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:34:19,154 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:34:19,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:34:19,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762823781] [2021-11-12 23:34:19,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:19,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:34:19,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:19,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:34:19,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:34:19,161 INFO L87 Difference]: Start difference. First operand 35112 states and 58292 transitions. Second operand has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 11 states have internal predecessors, (190), 5 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 7 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-12 23:34:21,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:23,193 WARN L515 Checker$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 23:34:25,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:27,205 WARN L515 Checker$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 23:34:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:34,201 INFO L93 Difference]: Finished difference Result 70180 states and 116670 transitions. [2021-11-12 23:34:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:34:34,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 11 states have internal predecessors, (190), 5 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 7 states have call predecessors, (31), 4 states have call successors, (31) Word has length 171 [2021-11-12 23:34:34,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:34,463 INFO L225 Difference]: With dead ends: 70180 [2021-11-12 23:34:34,463 INFO L226 Difference]: Without dead ends: 35232 [2021-11-12 23:34:34,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:34:34,811 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1165 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 3013 mSolverCounterSat, 328 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11357.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.40ms SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 3013 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11837.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:34,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 2583 Invalid, 3345 Unknown, 0 Unchecked, 23.40ms Time], IncrementalHoareTripleChecker [328 Valid, 3013 Invalid, 4 Unknown, 0 Unchecked, 11837.37ms Time] [2021-11-12 23:34:34,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35232 states. [2021-11-12 23:34:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35232 to 35112. [2021-11-12 23:34:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35112 states, 26321 states have (on average 1.5488013373352076) internal successors, (40766), 27844 states have internal predecessors, (40766), 7138 states have call successors, (7138), 1361 states have call predecessors, (7138), 1652 states have return successors, (10292), 6806 states have call predecessors, (10292), 7133 states have call successors, (10292) [2021-11-12 23:34:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35112 states to 35112 states and 58196 transitions. [2021-11-12 23:34:37,732 INFO L78 Accepts]: Start accepts. Automaton has 35112 states and 58196 transitions. Word has length 171 [2021-11-12 23:34:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:37,733 INFO L470 AbstractCegarLoop]: Abstraction has 35112 states and 58196 transitions. [2021-11-12 23:34:37,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 11 states have internal predecessors, (190), 5 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 7 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-12 23:34:37,734 INFO L276 IsEmpty]: Start isEmpty. Operand 35112 states and 58196 transitions. [2021-11-12 23:34:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-12 23:34:37,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:37,740 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:34:37,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-12 23:34:37,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:34:37,954 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:37,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:37,954 INFO L85 PathProgramCache]: Analyzing trace with hash 808310890, now seen corresponding path program 1 times [2021-11-12 23:34:37,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:37,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840470399] [2021-11-12 23:34:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:37,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:37,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:37,957 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:37,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ee85403-b04c-4450-9e8f-5caad8038073/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 23:34:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:38,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:34:38,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:34:39,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:34:39,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:34:39,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840470399] [2021-11-12 23:34:39,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840470399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:34:39,746 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:34:39,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 23:34:39,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809424575] [2021-11-12 23:34:39,747 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:39,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:34:39,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:34:39,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:34:39,748 INFO L87 Difference]: Start difference. First operand 35112 states and 58196 transitions. Second operand has 7 states, 7 states have (on average 28.142857142857142) internal successors, (197), 7 states have internal predecessors, (197), 5 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 5 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-12 23:34:41,772 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 23:34:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:53,977 INFO L93 Difference]: Finished difference Result 123403 states and 211352 transitions. [2021-11-12 23:34:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:34:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.142857142857142) internal successors, (197), 7 states have internal predecessors, (197), 5 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 5 states have call predecessors, (31), 4 states have call successors, (31) Word has length 172 [2021-11-12 23:34:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:54,955 INFO L225 Difference]: With dead ends: 123403 [2021-11-12 23:34:54,955 INFO L226 Difference]: Without dead ends: 88437 [2021-11-12 23:34:55,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:34:55,204 INFO L933 BasicCegarLoop]: 1061 mSDtfsCounter, 1899 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 447 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5303.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 2127 SdHoareTripleChecker+Invalid, 2935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.06ms SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5875.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:55,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 2127 Invalid, 2935 Unknown, 0 Unchecked, 23.06ms Time], IncrementalHoareTripleChecker [447 Valid, 2487 Invalid, 1 Unknown, 0 Unchecked, 5875.69ms Time] [2021-11-12 23:34:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88437 states.