./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:32:49,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:32:49,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:32:49,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:32:49,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:32:49,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:32:49,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:32:49,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:32:49,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:32:49,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:32:49,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:32:49,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:32:49,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:32:49,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:32:49,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:32:49,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:32:49,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:32:49,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:32:49,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:32:49,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:32:49,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:32:49,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:32:49,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:32:49,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:32:49,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:32:49,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:32:49,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:32:49,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:32:49,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:32:49,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:32:49,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:32:49,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:32:49,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:32:49,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:32:49,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:32:49,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:32:49,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:32:49,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:32:49,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:32:49,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:32:49,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:32:49,892 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:32:49,944 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:32:49,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:32:49,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:32:49,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:32:49,947 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:32:49,947 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:32:49,947 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:32:49,947 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:32:49,955 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:32:49,955 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:32:49,956 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:32:49,957 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:32:49,957 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:32:49,957 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:32:49,958 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:32:49,958 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:32:49,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:32:49,959 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:32:49,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:32:49,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:32:49,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:32:49,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:32:49,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:32:49,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:32:49,961 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:32:49,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:32:49,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:32:49,962 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:32:49,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:32:49,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:32:49,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:32:49,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:49,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:32:49,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:32:49,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:32:49,966 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:32:49,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:32:49,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:32:49,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:32:49,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:32:49,967 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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2021-11-13 02:32:50,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:32:50,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:32:50,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:32:50,339 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:32:50,340 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:32:50,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-13 02:32:50,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/data/4e627f4f0/42285d3a290c4124948695137b7040c8/FLAG159b0edb7 [2021-11-13 02:32:51,199 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:32:51,200 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-13 02:32:51,246 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/data/4e627f4f0/42285d3a290c4124948695137b7040c8/FLAG159b0edb7 [2021-11-13 02:32:51,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/data/4e627f4f0/42285d3a290c4124948695137b7040c8 [2021-11-13 02:32:51,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:32:51,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:32:51,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:51,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:32:51,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:32:51,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:51" (1/1) ... [2021-11-13 02:32:51,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29afacb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:51, skipping insertion in model container [2021-11-13 02:32:51,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:51" (1/1) ... [2021-11-13 02:32:51,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:32:51,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:52,035 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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-13 02:32:52,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:52,087 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) [2021-11-13 02:32:52,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29e50549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:52, skipping insertion in model container [2021-11-13 02:32:52,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:52,088 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:32:52,091 INFO L158 Benchmark]: Toolchain (without parser) took 787.18ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 56.1MB in the beginning and 80.4MB in the end (delta: -24.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 02:32:52,093 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 92.3MB. Free memory was 49.3MB in the beginning and 49.2MB in the end (delta: 44.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:32:52,095 INFO L158 Benchmark]: CACSL2BoogieTranslator took 784.05ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 56.0MB in the beginning and 81.0MB in the end (delta: -25.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 02:32:52,099 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 92.3MB. Free memory was 49.3MB in the beginning and 49.2MB in the end (delta: 44.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 784.05ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 56.0MB in the beginning and 81.0MB in the end (delta: -25.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1963]: 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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:32:54,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:32:54,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:32:54,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:32:54,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:32:54,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:32:54,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:32:54,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:32:54,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:32:54,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:32:54,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:32:54,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:32:54,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:32:54,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:32:54,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:32:54,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:32:54,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:32:54,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:32:54,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:32:54,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:32:54,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:32:54,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:32:54,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:32:54,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:32:54,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:32:54,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:32:54,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:32:54,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:32:54,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:32:54,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:32:54,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:32:54,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:32:54,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:32:54,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:32:54,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:32:54,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:32:54,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:32:54,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:32:54,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:32:54,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:32:54,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:32:54,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:32:54,989 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:32:54,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:32:54,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:32:54,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:32:54,992 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:32:54,993 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:32:54,993 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:32:54,993 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:32:54,993 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:32:54,994 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:32:54,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:32:54,997 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:32:54,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:32:54,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:32:54,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:32:54,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:32:54,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:32:54,999 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:32:54,999 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:32:54,999 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:32:54,999 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:32:55,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:32:55,000 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:32:55,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:32:55,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:32:55,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:32:55,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:32:55,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:55,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:32:55,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:32:55,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:32:55,003 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:32:55,003 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:32:55,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:32:55,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:32:55,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:32:55,004 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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2021-11-13 02:32:55,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:32:55,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:32:55,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:32:55,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:32:55,537 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:32:55,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-13 02:32:55,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/data/aed79a9ba/12fb9810d91a41149e213deffa6879df/FLAG8a9d2e2a4 [2021-11-13 02:32:56,497 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:32:56,498 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-13 02:32:56,538 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/data/aed79a9ba/12fb9810d91a41149e213deffa6879df/FLAG8a9d2e2a4 [2021-11-13 02:32:56,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/data/aed79a9ba/12fb9810d91a41149e213deffa6879df [2021-11-13 02:32:56,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:32:56,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:32:56,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:56,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:32:56,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:32:56,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:56" (1/1) ... [2021-11-13 02:32:56,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fa7e0c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:56, skipping insertion in model container [2021-11-13 02:32:56,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:56" (1/1) ... [2021-11-13 02:32:56,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:32:56,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:57,445 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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-13 02:32:57,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:57,506 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:32:57,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:57,777 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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-13 02:32:57,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:57,805 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:32:58,001 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_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-13 02:32:58,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:58,047 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:32:58,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58 WrapperNode [2021-11-13 02:32:58,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:58,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:58,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:32:58,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:32:58,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58" (1/1) ... [2021-11-13 02:32:58,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58" (1/1) ... [2021-11-13 02:32:58,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:58,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:32:58,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:32:58,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:32:58,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58" (1/1) ... [2021-11-13 02:32:58,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58" (1/1) ... [2021-11-13 02:32:58,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58" (1/1) ... [2021-11-13 02:32:58,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58" (1/1) ... [2021-11-13 02:32:58,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58" (1/1) ... [2021-11-13 02:32:58,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58" (1/1) ... [2021-11-13 02:32:58,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58" (1/1) ... [2021-11-13 02:32:58,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:32:58,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:32:58,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:32:58,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:32:58,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58" (1/1) ... [2021-11-13 02:32:58,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:58,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:58,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:32:58,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:32:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-13 02:32:58,526 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-13 02:32:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-13 02:32:58,527 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-13 02:32:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-13 02:32:58,527 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-13 02:32:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:32:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 02:32:58,528 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 02:32:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 02:32:58,528 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 02:32:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 02:32:58,529 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 02:32:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 02:32:58,529 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 02:32:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 02:32:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 02:32:58,530 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-13 02:32:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-13 02:32:58,530 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-13 02:32:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-13 02:32:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 02:32:58,531 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 02:32:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 02:32:58,531 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 02:32:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 02:32:58,532 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 02:32:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:32:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-13 02:32:58,532 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-13 02:32:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 02:32:58,533 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 02:32:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 02:32:58,534 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 02:32:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 02:32:58,534 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 02:32:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 02:32:58,535 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 02:32:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 02:32:58,535 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 02:32:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-13 02:32:58,536 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-13 02:32:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 02:32:58,536 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 02:32:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 02:32:58,536 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 02:32:58,537 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 02:32:58,537 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 02:32:58,537 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-13 02:32:58,538 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-13 02:32:58,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:32:58,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:32:58,542 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 02:32:58,542 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 02:33:03,087 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:33:03,087 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:33:03,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:33:03 BoogieIcfgContainer [2021-11-13 02:33:03,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:33:03,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:33:03,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:33:03,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:33:03,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:32:56" (1/3) ... [2021-11-13 02:33:03,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6a5434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:33:03, skipping insertion in model container [2021-11-13 02:33:03,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:58" (2/3) ... [2021-11-13 02:33:03,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6a5434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:33:03, skipping insertion in model container [2021-11-13 02:33:03,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:33:03" (3/3) ... [2021-11-13 02:33:03,101 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2021-11-13 02:33:03,107 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:33:03,107 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:33:03,171 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:33:03,179 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 [2021-11-13 02:33:03,179 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:33:03,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 570 states, 445 states have (on average 1.6898876404494383) internal successors, (752), 466 states have internal predecessors, (752), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-13 02:33:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 02:33:03,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:03,267 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] [2021-11-13 02:33:03,268 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash 679987401, now seen corresponding path program 1 times [2021-11-13 02:33:03,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:03,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518921253] [2021-11-13 02:33:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:03,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:03,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:03,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:03,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:33:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:04,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:33:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:04,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:33:04,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:04,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518921253] [2021-11-13 02:33:04,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518921253] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:04,812 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:04,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 02:33:04,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136902969] [2021-11-13 02:33:04,816 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:04,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:33:04,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:04,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:33:04,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:33:04,875 INFO L87 Difference]: Start difference. First operand has 570 states, 445 states have (on average 1.6898876404494383) internal successors, (752), 466 states have internal predecessors, (752), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 02:33:05,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:05,007 INFO L93 Difference]: Finished difference Result 591 states and 978 transitions. [2021-11-13 02:33:05,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:33:05,010 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 111 [2021-11-13 02:33:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:05,041 INFO L225 Difference]: With dead ends: 591 [2021-11-13 02:33:05,041 INFO L226 Difference]: Without dead ends: 562 [2021-11-13 02:33:05,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:33:05,052 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.50ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:05,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 17.50ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:33:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-13 02:33:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-13 02:33:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 439 states have (on average 1.6879271070615034) internal successors, (741), 458 states have internal predecessors, (741), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 932 transitions. [2021-11-13 02:33:05,178 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 932 transitions. Word has length 111 [2021-11-13 02:33:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:05,180 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 932 transitions. [2021-11-13 02:33:05,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 02:33:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 932 transitions. [2021-11-13 02:33:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 02:33:05,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:05,197 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] [2021-11-13 02:33:05,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:05,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:05,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:05,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:05,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2144316280, now seen corresponding path program 1 times [2021-11-13 02:33:05,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:05,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053299410] [2021-11-13 02:33:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:05,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:05,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:05,420 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:05,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:33:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:06,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:06,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:33:06,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:33:06,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:06,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053299410] [2021-11-13 02:33:06,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053299410] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:06,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:06,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:33:06,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352552424] [2021-11-13 02:33:06,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:06,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:06,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:06,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:07,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:07,001 INFO L87 Difference]: Start difference. First operand 562 states and 932 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:07,181 INFO L93 Difference]: Finished difference Result 1115 states and 1856 transitions. [2021-11-13 02:33:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:07,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 113 [2021-11-13 02:33:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:07,194 INFO L225 Difference]: With dead ends: 1115 [2021-11-13 02:33:07,194 INFO L226 Difference]: Without dead ends: 562 [2021-11-13 02:33:07,206 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 [2021-11-13 02:33:07,207 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 14 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.65ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.44ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:07,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2747 Invalid, 35 Unknown, 0 Unchecked, 24.65ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 51.44ms Time] [2021-11-13 02:33:07,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-13 02:33:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-13 02:33:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 439 states have (on average 1.6856492027334853) internal successors, (740), 458 states have internal predecessors, (740), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 931 transitions. [2021-11-13 02:33:07,301 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 931 transitions. Word has length 113 [2021-11-13 02:33:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:07,304 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 931 transitions. [2021-11-13 02:33:07,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:07,305 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 931 transitions. [2021-11-13 02:33:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-13 02:33:07,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:07,319 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] [2021-11-13 02:33:07,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:07,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:07,532 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:07,533 INFO L85 PathProgramCache]: Analyzing trace with hash 219685296, now seen corresponding path program 1 times [2021-11-13 02:33:07,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:07,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139999599] [2021-11-13 02:33:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:07,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:07,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:07,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:07,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:33:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:08,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:33:08,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:33:09,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:09,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139999599] [2021-11-13 02:33:09,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139999599] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:09,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:09,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:33:09,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530007051] [2021-11-13 02:33:09,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:09,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:09,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:09,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:09,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:09,015 INFO L87 Difference]: Start difference. First operand 562 states and 931 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:09,137 INFO L93 Difference]: Finished difference Result 1115 states and 1854 transitions. [2021-11-13 02:33:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:09,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 115 [2021-11-13 02:33:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:09,149 INFO L225 Difference]: With dead ends: 1115 [2021-11-13 02:33:09,150 INFO L226 Difference]: Without dead ends: 562 [2021-11-13 02:33:09,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:09,160 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 12 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.68ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:09,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2747 Invalid, 33 Unknown, 0 Unchecked, 19.33ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 46.68ms Time] [2021-11-13 02:33:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-13 02:33:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-13 02:33:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 439 states have (on average 1.683371298405467) internal successors, (739), 458 states have internal predecessors, (739), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 930 transitions. [2021-11-13 02:33:09,222 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 930 transitions. Word has length 115 [2021-11-13 02:33:09,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:09,223 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 930 transitions. [2021-11-13 02:33:09,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 930 transitions. [2021-11-13 02:33:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 02:33:09,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:09,231 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] [2021-11-13 02:33:09,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:09,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:09,444 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1262716040, now seen corresponding path program 1 times [2021-11-13 02:33:09,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:09,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763854045] [2021-11-13 02:33:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:09,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:09,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:09,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:09,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:33:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:10,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:10,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:33:10,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:33:11,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:11,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763854045] [2021-11-13 02:33:11,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763854045] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:11,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:11,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:33:11,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916646742] [2021-11-13 02:33:11,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:11,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:11,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:11,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:11,066 INFO L87 Difference]: Start difference. First operand 562 states and 930 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:11,155 INFO L93 Difference]: Finished difference Result 1119 states and 1857 transitions. [2021-11-13 02:33:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:33:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-11-13 02:33:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:11,163 INFO L225 Difference]: With dead ends: 1119 [2021-11-13 02:33:11,163 INFO L226 Difference]: Without dead ends: 568 [2021-11-13 02:33:11,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:11,176 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 13 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.64ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.18ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:11,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2747 Invalid, 35 Unknown, 0 Unchecked, 8.64ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 39.18ms Time] [2021-11-13 02:33:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-13 02:33:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-13 02:33:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6756756756756757) internal successors, (744), 463 states have internal predecessors, (744), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:11,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 935 transitions. [2021-11-13 02:33:11,215 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 935 transitions. Word has length 117 [2021-11-13 02:33:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:11,216 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 935 transitions. [2021-11-13 02:33:11,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 935 transitions. [2021-11-13 02:33:11,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-13 02:33:11,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:11,221 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] [2021-11-13 02:33:11,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:11,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:11,445 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash 559297322, now seen corresponding path program 1 times [2021-11-13 02:33:11,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:11,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425704588] [2021-11-13 02:33:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:11,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:11,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:11,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:11,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:33:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:12,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:12,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:33:12,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:33:12,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:12,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425704588] [2021-11-13 02:33:12,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425704588] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:12,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:12,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:33:12,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724658263] [2021-11-13 02:33:12,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:12,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:12,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:12,838 INFO L87 Difference]: Start difference. First operand 568 states and 935 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:12,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:12,924 INFO L93 Difference]: Finished difference Result 1118 states and 1848 transitions. [2021-11-13 02:33:12,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:12,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-11-13 02:33:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:12,931 INFO L225 Difference]: With dead ends: 1118 [2021-11-13 02:33:12,931 INFO L226 Difference]: Without dead ends: 568 [2021-11-13 02:33:12,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:12,935 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 8 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.62ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.36ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:12,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2748 Invalid, 30 Unknown, 0 Unchecked, 5.62ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 39.36ms Time] [2021-11-13 02:33:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-13 02:33:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-13 02:33:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6734234234234233) internal successors, (743), 463 states have internal predecessors, (743), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 934 transitions. [2021-11-13 02:33:12,962 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 934 transitions. Word has length 118 [2021-11-13 02:33:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:12,963 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 934 transitions. [2021-11-13 02:33:12,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 934 transitions. [2021-11-13 02:33:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 02:33:12,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:12,968 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] [2021-11-13 02:33:13,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:13,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:13,191 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:13,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1435315900, now seen corresponding path program 1 times [2021-11-13 02:33:13,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:13,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784720621] [2021-11-13 02:33:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:13,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:13,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:13,195 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:13,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:33:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:13,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:13,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:33:14,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:33:14,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:14,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784720621] [2021-11-13 02:33:14,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784720621] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:14,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:14,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:33:14,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563531846] [2021-11-13 02:33:14,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:14,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:14,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:14,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:14,638 INFO L87 Difference]: Start difference. First operand 568 states and 934 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:14,759 INFO L93 Difference]: Finished difference Result 1118 states and 1847 transitions. [2021-11-13 02:33:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 119 [2021-11-13 02:33:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:14,769 INFO L225 Difference]: With dead ends: 1118 [2021-11-13 02:33:14,769 INFO L226 Difference]: Without dead ends: 568 [2021-11-13 02:33:14,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:14,775 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 6 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.14ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:14,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2748 Invalid, 28 Unknown, 0 Unchecked, 7.71ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 39.14ms Time] [2021-11-13 02:33:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-13 02:33:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-13 02:33:14,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6711711711711712) internal successors, (742), 463 states have internal predecessors, (742), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 933 transitions. [2021-11-13 02:33:14,812 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 933 transitions. Word has length 119 [2021-11-13 02:33:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:14,813 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 933 transitions. [2021-11-13 02:33:14,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 933 transitions. [2021-11-13 02:33:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 02:33:14,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:14,820 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] [2021-11-13 02:33:14,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:15,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:15,035 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1244700050, now seen corresponding path program 1 times [2021-11-13 02:33:15,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:15,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247148685] [2021-11-13 02:33:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:15,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:15,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:15,040 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:15,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:33:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:15,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:33:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:16,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:16,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:16,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247148685] [2021-11-13 02:33:16,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247148685] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:16,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:16,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-13 02:33:16,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702549230] [2021-11-13 02:33:16,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:16,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:33:16,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:16,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:33:16,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:33:16,722 INFO L87 Difference]: Start difference. First operand 568 states and 933 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:33:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:17,019 INFO L93 Difference]: Finished difference Result 1135 states and 1875 transitions. [2021-11-13 02:33:17,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:33:17,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 120 [2021-11-13 02:33:17,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:17,031 INFO L225 Difference]: With dead ends: 1135 [2021-11-13 02:33:17,031 INFO L226 Difference]: Without dead ends: 589 [2021-11-13 02:33:17,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:33:17,036 INFO L933 BasicCegarLoop]: 917 mSDtfsCounter, 148 mSDsluCounter, 4478 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5395 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 224.25ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:17,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5395 Invalid, 85 Unknown, 0 Unchecked, 11.75ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 224.25ms Time] [2021-11-13 02:33:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-13 02:33:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 587. [2021-11-13 02:33:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 460 states have (on average 1.6695652173913043) internal successors, (768), 481 states have internal predecessors, (768), 99 states have call successors, (99), 26 states have call predecessors, (99), 27 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-11-13 02:33:17,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 964 transitions. [2021-11-13 02:33:17,074 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 964 transitions. Word has length 120 [2021-11-13 02:33:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:17,074 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 964 transitions. [2021-11-13 02:33:17,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:33:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 964 transitions. [2021-11-13 02:33:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 02:33:17,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:17,081 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] [2021-11-13 02:33:17,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:17,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:17,304 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:17,305 INFO L85 PathProgramCache]: Analyzing trace with hash -113913425, now seen corresponding path program 1 times [2021-11-13 02:33:17,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:17,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671669343] [2021-11-13 02:33:17,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:17,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:17,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:17,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:17,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:33:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:18,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:33:18,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:33:18,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:18,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671669343] [2021-11-13 02:33:18,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671669343] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:18,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:18,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-13 02:33:18,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116824288] [2021-11-13 02:33:18,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:18,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:18,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:18,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:33:18,899 INFO L87 Difference]: Start difference. First operand 587 states and 964 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:19,018 INFO L93 Difference]: Finished difference Result 1148 states and 1897 transitions. [2021-11-13 02:33:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:33:19,020 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-13 02:33:19,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:19,027 INFO L225 Difference]: With dead ends: 1148 [2021-11-13 02:33:19,028 INFO L226 Difference]: Without dead ends: 583 [2021-11-13 02:33:19,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:19,033 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 8 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.54ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.31ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:19,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2747 Invalid, 30 Unknown, 0 Unchecked, 16.54ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 53.31ms Time] [2021-11-13 02:33:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-13 02:33:19,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-13 02:33:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 458 states have (on average 1.6703056768558953) internal successors, (765), 478 states have internal predecessors, (765), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-13 02:33:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 957 transitions. [2021-11-13 02:33:19,070 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 957 transitions. Word has length 120 [2021-11-13 02:33:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:19,070 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 957 transitions. [2021-11-13 02:33:19,070 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 957 transitions. [2021-11-13 02:33:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 02:33:19,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:19,077 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, 1] [2021-11-13 02:33:19,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:19,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:19,297 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:19,298 INFO L85 PathProgramCache]: Analyzing trace with hash 993576915, now seen corresponding path program 1 times [2021-11-13 02:33:19,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:19,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400962297] [2021-11-13 02:33:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:19,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:19,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:19,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:19,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:33:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:20,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:20,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:20,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:33:20,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:20,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400962297] [2021-11-13 02:33:20,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400962297] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:20,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:20,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:33:20,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411016107] [2021-11-13 02:33:20,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:20,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:20,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:20,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:20,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:20,819 INFO L87 Difference]: Start difference. First operand 583 states and 957 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:21,095 INFO L93 Difference]: Finished difference Result 1174 states and 1942 transitions. [2021-11-13 02:33:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:21,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 121 [2021-11-13 02:33:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:21,106 INFO L225 Difference]: With dead ends: 1174 [2021-11-13 02:33:21,106 INFO L226 Difference]: Without dead ends: 583 [2021-11-13 02:33:21,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:21,113 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 134 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.08ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.88ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:21,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2555 Invalid, 131 Unknown, 0 Unchecked, 10.08ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 214.88ms Time] [2021-11-13 02:33:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-13 02:33:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-13 02:33:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 458 states have (on average 1.6593886462882097) internal successors, (760), 478 states have internal predecessors, (760), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-13 02:33:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 952 transitions. [2021-11-13 02:33:21,148 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 952 transitions. Word has length 121 [2021-11-13 02:33:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:21,148 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 952 transitions. [2021-11-13 02:33:21,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 952 transitions. [2021-11-13 02:33:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 02:33:21,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:21,156 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, 1, 1, 1] [2021-11-13 02:33:21,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:21,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:21,381 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:21,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash 840520301, now seen corresponding path program 1 times [2021-11-13 02:33:21,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:21,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819596452] [2021-11-13 02:33:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:21,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:21,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:21,385 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:21,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:33:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:22,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:22,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:22,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:33:22,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:22,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819596452] [2021-11-13 02:33:22,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819596452] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:22,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:22,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:33:22,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521426166] [2021-11-13 02:33:22,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:22,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:22,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:22,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:22,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:22,918 INFO L87 Difference]: Start difference. First operand 583 states and 952 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:23,193 INFO L93 Difference]: Finished difference Result 1174 states and 1932 transitions. [2021-11-13 02:33:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 123 [2021-11-13 02:33:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:23,203 INFO L225 Difference]: With dead ends: 1174 [2021-11-13 02:33:23,204 INFO L226 Difference]: Without dead ends: 583 [2021-11-13 02:33:23,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:23,209 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 128 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.29ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.06ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:23,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2555 Invalid, 121 Unknown, 0 Unchecked, 8.29ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 214.06ms Time] [2021-11-13 02:33:23,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-13 02:33:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-13 02:33:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 458 states have (on average 1.648471615720524) internal successors, (755), 478 states have internal predecessors, (755), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-13 02:33:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 947 transitions. [2021-11-13 02:33:23,242 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 947 transitions. Word has length 123 [2021-11-13 02:33:23,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:23,243 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 947 transitions. [2021-11-13 02:33:23,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 947 transitions. [2021-11-13 02:33:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 02:33:23,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:23,250 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, 1, 1, 1, 1, 1] [2021-11-13 02:33:23,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:23,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:23,464 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash 936712371, now seen corresponding path program 1 times [2021-11-13 02:33:23,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:23,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543421814] [2021-11-13 02:33:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:23,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:23,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:23,468 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:23,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:33:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:24,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:24,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:24,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:33:24,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:24,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543421814] [2021-11-13 02:33:24,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543421814] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:24,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:24,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:33:24,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567660526] [2021-11-13 02:33:24,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:24,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:24,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:24,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:24,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:24,909 INFO L87 Difference]: Start difference. First operand 583 states and 947 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:25,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:25,156 INFO L93 Difference]: Finished difference Result 1195 states and 1953 transitions. [2021-11-13 02:33:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:33:25,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-11-13 02:33:25,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:25,165 INFO L225 Difference]: With dead ends: 1195 [2021-11-13 02:33:25,166 INFO L226 Difference]: Without dead ends: 613 [2021-11-13 02:33:25,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:25,171 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 143 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2565 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.56ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 203.34ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:25,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2565 Invalid, 131 Unknown, 0 Unchecked, 7.56ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 203.34ms Time] [2021-11-13 02:33:25,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-13 02:33:25,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 598. [2021-11-13 02:33:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 473 states have (on average 1.627906976744186) internal successors, (770), 492 states have internal predecessors, (770), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 961 transitions. [2021-11-13 02:33:25,202 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 961 transitions. Word has length 125 [2021-11-13 02:33:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:25,203 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 961 transitions. [2021-11-13 02:33:25,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 961 transitions. [2021-11-13 02:33:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 02:33:25,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:25,209 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, 1, 1, 1, 1, 1] [2021-11-13 02:33:25,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:25,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:25,437 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:25,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:25,438 INFO L85 PathProgramCache]: Analyzing trace with hash -734352333, now seen corresponding path program 1 times [2021-11-13 02:33:25,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:25,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867335106] [2021-11-13 02:33:25,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:25,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:25,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:25,440 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:25,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:33:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:26,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:33:26,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:26,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:26,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:26,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867335106] [2021-11-13 02:33:26,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867335106] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:26,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:26,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-13 02:33:26,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214692571] [2021-11-13 02:33:26,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:26,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:33:26,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:26,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:33:26,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:33:26,922 INFO L87 Difference]: Start difference. First operand 598 states and 961 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:33:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:27,140 INFO L93 Difference]: Finished difference Result 1159 states and 1874 transitions. [2021-11-13 02:33:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:33:27,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 125 [2021-11-13 02:33:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:27,148 INFO L225 Difference]: With dead ends: 1159 [2021-11-13 02:33:27,149 INFO L226 Difference]: Without dead ends: 592 [2021-11-13 02:33:27,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:33:27,154 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 131 mSDsluCounter, 4443 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5363 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.58ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:27,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5363 Invalid, 75 Unknown, 0 Unchecked, 12.47ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 158.58ms Time] [2021-11-13 02:33:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-13 02:33:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 577. [2021-11-13 02:33:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 452 states have (on average 1.6216814159292035) internal successors, (733), 471 states have internal predecessors, (733), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 924 transitions. [2021-11-13 02:33:27,184 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 924 transitions. Word has length 125 [2021-11-13 02:33:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:27,185 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 924 transitions. [2021-11-13 02:33:27,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:33:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 924 transitions. [2021-11-13 02:33:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-13 02:33:27,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:27,191 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, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:27,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:27,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:27,404 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash 766165643, now seen corresponding path program 1 times [2021-11-13 02:33:27,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:27,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966673807] [2021-11-13 02:33:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:27,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:27,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:27,406 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:27,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 02:33:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:28,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:28,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:28,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:33:28,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:28,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966673807] [2021-11-13 02:33:28,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966673807] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:28,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:28,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:33:28,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93021228] [2021-11-13 02:33:28,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:28,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:28,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:28,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:28,748 INFO L87 Difference]: Start difference. First operand 577 states and 924 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:28,900 INFO L93 Difference]: Finished difference Result 1123 states and 1812 transitions. [2021-11-13 02:33:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:28,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 126 [2021-11-13 02:33:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:28,908 INFO L225 Difference]: With dead ends: 1123 [2021-11-13 02:33:28,908 INFO L226 Difference]: Without dead ends: 577 [2021-11-13 02:33:28,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:28,914 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 69 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.38ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:28,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2579 Invalid, 54 Unknown, 0 Unchecked, 6.38ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 114.54ms Time] [2021-11-13 02:33:28,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-13 02:33:28,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-13 02:33:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 452 states have (on average 1.6194690265486726) internal successors, (732), 471 states have internal predecessors, (732), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 923 transitions. [2021-11-13 02:33:28,944 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 923 transitions. Word has length 126 [2021-11-13 02:33:28,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:28,944 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 923 transitions. [2021-11-13 02:33:28,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 923 transitions. [2021-11-13 02:33:28,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 02:33:28,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:28,950 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:28,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:29,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:29,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:29,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:29,164 INFO L85 PathProgramCache]: Analyzing trace with hash -696856498, now seen corresponding path program 1 times [2021-11-13 02:33:29,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:29,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002244906] [2021-11-13 02:33:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:29,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:29,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:29,166 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:29,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:33:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:29,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:30,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:33:30,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:30,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002244906] [2021-11-13 02:33:30,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002244906] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:30,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:30,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:33:30,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046817596] [2021-11-13 02:33:30,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:30,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:30,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:30,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:30,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:30,482 INFO L87 Difference]: Start difference. First operand 577 states and 923 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:30,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:30,633 INFO L93 Difference]: Finished difference Result 1123 states and 1811 transitions. [2021-11-13 02:33:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:30,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 127 [2021-11-13 02:33:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:30,642 INFO L225 Difference]: With dead ends: 1123 [2021-11-13 02:33:30,642 INFO L226 Difference]: Without dead ends: 577 [2021-11-13 02:33:30,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:30,647 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 67 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.28ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.37ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:30,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2579 Invalid, 52 Unknown, 0 Unchecked, 6.28ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 110.37ms Time] [2021-11-13 02:33:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-13 02:33:30,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-13 02:33:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 452 states have (on average 1.6172566371681416) internal successors, (731), 471 states have internal predecessors, (731), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 922 transitions. [2021-11-13 02:33:30,676 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 922 transitions. Word has length 127 [2021-11-13 02:33:30,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:30,676 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 922 transitions. [2021-11-13 02:33:30,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:33:30,677 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 922 transitions. [2021-11-13 02:33:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 02:33:30,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:30,682 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:30,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:30,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:30,904 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:30,904 INFO L85 PathProgramCache]: Analyzing trace with hash 723056518, now seen corresponding path program 1 times [2021-11-13 02:33:30,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:30,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118454899] [2021-11-13 02:33:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:30,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:30,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:30,906 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:30,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:33:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:33:31,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:31,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:32,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:32,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118454899] [2021-11-13 02:33:32,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118454899] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:32,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:32,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 02:33:32,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291208205] [2021-11-13 02:33:32,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:32,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:33:32,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:32,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:33:32,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:33:32,716 INFO L87 Difference]: Start difference. First operand 577 states and 922 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:33:33,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:33,062 INFO L93 Difference]: Finished difference Result 1128 states and 1818 transitions. [2021-11-13 02:33:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:33:33,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 128 [2021-11-13 02:33:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:33,070 INFO L225 Difference]: With dead ends: 1128 [2021-11-13 02:33:33,070 INFO L226 Difference]: Without dead ends: 588 [2021-11-13 02:33:33,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:33:33,076 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 109 mSDsluCounter, 5120 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5984 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.56ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 239.29ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:33,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5984 Invalid, 152 Unknown, 0 Unchecked, 12.56ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 239.29ms Time] [2021-11-13 02:33:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-11-13 02:33:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 579. [2021-11-13 02:33:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 454 states have (on average 1.6123348017621146) internal successors, (732), 473 states have internal predecessors, (732), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 923 transitions. [2021-11-13 02:33:33,105 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 923 transitions. Word has length 128 [2021-11-13 02:33:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:33,106 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 923 transitions. [2021-11-13 02:33:33,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:33:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 923 transitions. [2021-11-13 02:33:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 02:33:33,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:33,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:33,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:33,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:33,340 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:33,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:33,340 INFO L85 PathProgramCache]: Analyzing trace with hash -123509479, now seen corresponding path program 1 times [2021-11-13 02:33:33,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:33,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292268901] [2021-11-13 02:33:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:33,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:33,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:33,343 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:33,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:33:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:34,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:33:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:34,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:35,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:35,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292268901] [2021-11-13 02:33:35,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292268901] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:35,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:35,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 02:33:35,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863851772] [2021-11-13 02:33:35,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:35,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:33:35,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:35,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:33:35,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:33:35,004 INFO L87 Difference]: Start difference. First operand 579 states and 923 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:33:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:35,348 INFO L93 Difference]: Finished difference Result 1120 states and 1799 transitions. [2021-11-13 02:33:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:33:35,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 129 [2021-11-13 02:33:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:35,355 INFO L225 Difference]: With dead ends: 1120 [2021-11-13 02:33:35,355 INFO L226 Difference]: Without dead ends: 584 [2021-11-13 02:33:35,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:33:35,360 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 77 mSDsluCounter, 5126 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 217.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5992 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.19ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 243.16ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:35,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5992 Invalid, 152 Unknown, 0 Unchecked, 10.19ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 243.16ms Time] [2021-11-13 02:33:35,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-13 02:33:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 581. [2021-11-13 02:33:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 456 states have (on average 1.6074561403508771) internal successors, (733), 475 states have internal predecessors, (733), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 924 transitions. [2021-11-13 02:33:35,392 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 924 transitions. Word has length 129 [2021-11-13 02:33:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:35,392 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 924 transitions. [2021-11-13 02:33:35,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:33:35,393 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 924 transitions. [2021-11-13 02:33:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 02:33:35,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:35,398 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:35,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:35,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:35,617 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:35,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:35,618 INFO L85 PathProgramCache]: Analyzing trace with hash -549707088, now seen corresponding path program 1 times [2021-11-13 02:33:35,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:35,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597381429] [2021-11-13 02:33:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:35,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:35,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:35,621 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:35,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:33:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:36,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:33:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:36,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:37,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:37,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597381429] [2021-11-13 02:33:37,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597381429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:37,076 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:37,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:33:37,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479240591] [2021-11-13 02:33:37,076 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:37,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:33:37,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:37,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:33:37,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:33:37,079 INFO L87 Difference]: Start difference. First operand 581 states and 924 transitions. Second operand has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:37,347 INFO L93 Difference]: Finished difference Result 1066 states and 1726 transitions. [2021-11-13 02:33:37,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:33:37,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 130 [2021-11-13 02:33:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:37,355 INFO L225 Difference]: With dead ends: 1066 [2021-11-13 02:33:37,355 INFO L226 Difference]: Without dead ends: 574 [2021-11-13 02:33:37,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:33:37,361 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 55 mSDsluCounter, 5199 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 163.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 6077 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.15ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 179.49ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:37,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 6077 Invalid, 96 Unknown, 0 Unchecked, 11.15ms Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 179.49ms Time] [2021-11-13 02:33:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-13 02:33:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-13 02:33:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.6146993318485523) internal successors, (725), 468 states have internal predecessors, (725), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 916 transitions. [2021-11-13 02:33:37,394 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 916 transitions. Word has length 130 [2021-11-13 02:33:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:37,395 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 916 transitions. [2021-11-13 02:33:37,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:37,396 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 916 transitions. [2021-11-13 02:33:37,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 02:33:37,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:37,402 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:37,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:37,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:37,626 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:37,626 INFO L85 PathProgramCache]: Analyzing trace with hash -702727405, now seen corresponding path program 1 times [2021-11-13 02:33:37,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:37,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101774335] [2021-11-13 02:33:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:37,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:37,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:37,628 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:37,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:33:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:33:38,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:38,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:39,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:39,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101774335] [2021-11-13 02:33:39,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101774335] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:39,111 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:39,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:33:39,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136219730] [2021-11-13 02:33:39,115 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:39,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:33:39,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:39,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:33:39,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:33:39,118 INFO L87 Difference]: Start difference. First operand 574 states and 916 transitions. Second operand has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:39,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:39,312 INFO L93 Difference]: Finished difference Result 1071 states and 1740 transitions. [2021-11-13 02:33:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:33:39,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 131 [2021-11-13 02:33:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:39,319 INFO L225 Difference]: With dead ends: 1071 [2021-11-13 02:33:39,320 INFO L226 Difference]: Without dead ends: 571 [2021-11-13 02:33:39,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:33:39,324 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 170 mSDsluCounter, 5200 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 6070 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.68ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.40ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:39,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 6070 Invalid, 93 Unknown, 0 Unchecked, 6.68ms Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 147.40ms Time] [2021-11-13 02:33:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-13 02:33:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-13 02:33:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 446 states have (on average 1.6143497757847534) internal successors, (720), 465 states have internal predecessors, (720), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 911 transitions. [2021-11-13 02:33:39,351 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 911 transitions. Word has length 131 [2021-11-13 02:33:39,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:39,351 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 911 transitions. [2021-11-13 02:33:39,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 911 transitions. [2021-11-13 02:33:39,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 02:33:39,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:39,357 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:39,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:39,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:39,579 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1669023853, now seen corresponding path program 1 times [2021-11-13 02:33:39,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:39,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825627734] [2021-11-13 02:33:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:39,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:39,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:39,581 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:39,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 02:33:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:40,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:33:40,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:40,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:41,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:41,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825627734] [2021-11-13 02:33:41,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825627734] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:41,045 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:41,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 02:33:41,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041012607] [2021-11-13 02:33:41,046 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:41,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:33:41,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:41,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:33:41,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:33:41,048 INFO L87 Difference]: Start difference. First operand 571 states and 911 transitions. Second operand has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-13 02:33:41,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:41,213 INFO L93 Difference]: Finished difference Result 1068 states and 1735 transitions. [2021-11-13 02:33:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:33:41,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 131 [2021-11-13 02:33:41,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:41,220 INFO L225 Difference]: With dead ends: 1068 [2021-11-13 02:33:41,221 INFO L226 Difference]: Without dead ends: 563 [2021-11-13 02:33:41,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:33:41,225 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 105 mSDsluCounter, 4282 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5151 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.22ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.24ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:41,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 5151 Invalid, 68 Unknown, 0 Unchecked, 6.22ms Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 120.24ms Time] [2021-11-13 02:33:41,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-13 02:33:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-13 02:33:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 438 states have (on average 1.6187214611872147) internal successors, (709), 457 states have internal predecessors, (709), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 900 transitions. [2021-11-13 02:33:41,252 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 900 transitions. Word has length 131 [2021-11-13 02:33:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:41,253 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 900 transitions. [2021-11-13 02:33:41,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-13 02:33:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 900 transitions. [2021-11-13 02:33:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 02:33:41,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:41,258 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:41,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:41,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:41,477 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:41,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1190417612, now seen corresponding path program 1 times [2021-11-13 02:33:41,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:41,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794499826] [2021-11-13 02:33:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:41,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:41,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:41,480 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:41,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:33:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:42,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:33:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:42,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:43,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:43,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794499826] [2021-11-13 02:33:43,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794499826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:43,267 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:43,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:33:43,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422758513] [2021-11-13 02:33:43,268 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:43,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:33:43,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:43,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:33:43,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:33:43,270 INFO L87 Difference]: Start difference. First operand 563 states and 900 transitions. Second operand has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:43,603 INFO L93 Difference]: Finished difference Result 1054 states and 1713 transitions. [2021-11-13 02:33:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:33:43,605 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 132 [2021-11-13 02:33:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:43,611 INFO L225 Difference]: With dead ends: 1054 [2021-11-13 02:33:43,611 INFO L226 Difference]: Without dead ends: 563 [2021-11-13 02:33:43,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:33:43,616 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 101 mSDsluCounter, 5978 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 220.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6843 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 244.62ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:43,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 6843 Invalid, 132 Unknown, 0 Unchecked, 9.26ms Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 244.62ms Time] [2021-11-13 02:33:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-13 02:33:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-13 02:33:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 438 states have (on average 1.6164383561643836) internal successors, (708), 457 states have internal predecessors, (708), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 899 transitions. [2021-11-13 02:33:43,652 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 899 transitions. Word has length 132 [2021-11-13 02:33:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:43,653 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 899 transitions. [2021-11-13 02:33:43,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 899 transitions. [2021-11-13 02:33:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-13 02:33:43,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:43,658 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] [2021-11-13 02:33:43,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:43,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:43,872 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:43,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2139488945, now seen corresponding path program 1 times [2021-11-13 02:33:43,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:43,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56883430] [2021-11-13 02:33:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:43,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:43,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:43,876 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:43,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:33:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:33:44,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:45,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:45,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:45,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56883430] [2021-11-13 02:33:45,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56883430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:45,631 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:45,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:33:45,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90168055] [2021-11-13 02:33:45,631 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:45,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:33:45,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:45,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:33:45,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:33:45,633 INFO L87 Difference]: Start difference. First operand 563 states and 899 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:45,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:45,858 INFO L93 Difference]: Finished difference Result 1098 states and 1770 transitions. [2021-11-13 02:33:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:33:45,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 133 [2021-11-13 02:33:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:45,866 INFO L225 Difference]: With dead ends: 1098 [2021-11-13 02:33:45,866 INFO L226 Difference]: Without dead ends: 560 [2021-11-13 02:33:45,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:33:45,871 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 156 mSDsluCounter, 5061 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 5914 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.51ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.93ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:45,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 5914 Invalid, 104 Unknown, 0 Unchecked, 7.51ms Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 140.93ms Time] [2021-11-13 02:33:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-13 02:33:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2021-11-13 02:33:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 435 states have (on average 1.6091954022988506) internal successors, (700), 454 states have internal predecessors, (700), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:45,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 891 transitions. [2021-11-13 02:33:45,939 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 891 transitions. Word has length 133 [2021-11-13 02:33:45,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:45,940 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 891 transitions. [2021-11-13 02:33:45,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 891 transitions. [2021-11-13 02:33:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 02:33:45,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:45,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:45,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:46,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:46,172 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash -130999527, now seen corresponding path program 1 times [2021-11-13 02:33:46,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:46,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127060910] [2021-11-13 02:33:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:46,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:46,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:46,175 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:46,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 02:33:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:46,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:33:46,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:47,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:47,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:47,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127060910] [2021-11-13 02:33:47,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127060910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:47,711 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:47,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:33:47,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933006850] [2021-11-13 02:33:47,712 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:47,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:33:47,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:33:47,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:33:47,714 INFO L87 Difference]: Start difference. First operand 560 states and 891 transitions. Second operand has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:47,992 INFO L93 Difference]: Finished difference Result 1045 states and 1693 transitions. [2021-11-13 02:33:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:33:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 134 [2021-11-13 02:33:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:48,001 INFO L225 Difference]: With dead ends: 1045 [2021-11-13 02:33:48,002 INFO L226 Difference]: Without dead ends: 560 [2021-11-13 02:33:48,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:33:48,006 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 81 mSDsluCounter, 5932 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6786 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 194.66ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:48,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 6786 Invalid, 130 Unknown, 0 Unchecked, 8.60ms Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 194.66ms Time] [2021-11-13 02:33:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-13 02:33:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2021-11-13 02:33:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 435 states have (on average 1.606896551724138) internal successors, (699), 454 states have internal predecessors, (699), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:48,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 890 transitions. [2021-11-13 02:33:48,032 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 890 transitions. Word has length 134 [2021-11-13 02:33:48,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:48,032 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 890 transitions. [2021-11-13 02:33:48,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 890 transitions. [2021-11-13 02:33:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 02:33:48,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:48,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:48,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:48,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:48,252 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1294149790, now seen corresponding path program 1 times [2021-11-13 02:33:48,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:48,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251385083] [2021-11-13 02:33:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:48,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:48,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:48,254 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:48,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 02:33:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:48,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:33:48,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:49,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:49,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:49,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251385083] [2021-11-13 02:33:49,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251385083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:49,834 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:49,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:33:49,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293682347] [2021-11-13 02:33:49,834 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:49,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:33:49,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:49,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:33:49,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:33:49,837 INFO L87 Difference]: Start difference. First operand 560 states and 890 transitions. Second operand has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:50,118 INFO L93 Difference]: Finished difference Result 1083 states and 1738 transitions. [2021-11-13 02:33:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:33:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 135 [2021-11-13 02:33:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:50,125 INFO L225 Difference]: With dead ends: 1083 [2021-11-13 02:33:50,126 INFO L226 Difference]: Without dead ends: 557 [2021-11-13 02:33:50,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:33:50,130 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 132 mSDsluCounter, 6777 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 7629 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.87ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 194.01ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:50,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 7629 Invalid, 146 Unknown, 0 Unchecked, 8.87ms Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 194.01ms Time] [2021-11-13 02:33:50,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-13 02:33:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-13 02:33:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 432 states have (on average 1.599537037037037) internal successors, (691), 451 states have internal predecessors, (691), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:33:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 882 transitions. [2021-11-13 02:33:50,156 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 882 transitions. Word has length 135 [2021-11-13 02:33:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:50,156 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 882 transitions. [2021-11-13 02:33:50,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:33:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 882 transitions. [2021-11-13 02:33:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 02:33:50,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:50,162 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] [2021-11-13 02:33:50,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:50,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:50,376 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:50,376 INFO L85 PathProgramCache]: Analyzing trace with hash 71332286, now seen corresponding path program 1 times [2021-11-13 02:33:50,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:50,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204068051] [2021-11-13 02:33:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:50,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:50,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:50,378 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:50,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 02:33:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:51,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 02:33:51,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:33:51,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:33:52,784 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:52,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204068051] [2021-11-13 02:33:52,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204068051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:52,784 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:52,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-13 02:33:52,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480323347] [2021-11-13 02:33:52,785 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:52,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:33:52,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:33:52,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:33:52,787 INFO L87 Difference]: Start difference. First operand 557 states and 882 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-13 02:33:54,824 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 [] [2021-11-13 02:33:56,832 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:58,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:04,571 INFO L93 Difference]: Finished difference Result 1173 states and 1931 transitions. [2021-11-13 02:34:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:34:04,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) Word has length 136 [2021-11-13 02:34:04,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:04,577 INFO L225 Difference]: With dead ends: 1173 [2021-11-13 02:34:04,577 INFO L226 Difference]: Without dead ends: 696 [2021-11-13 02:34:04,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:34:04,582 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 2072 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 4056 mSolverCounterSat, 824 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10835.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2072 SdHoareTripleChecker+Valid, 3301 SdHoareTripleChecker+Invalid, 4883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.21ms SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 4056 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11556.98ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:04,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2072 Valid, 3301 Invalid, 4883 Unknown, 0 Unchecked, 34.21ms Time], IncrementalHoareTripleChecker [824 Valid, 4056 Invalid, 3 Unknown, 0 Unchecked, 11556.98ms Time] [2021-11-13 02:34:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-11-13 02:34:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 561. [2021-11-13 02:34:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 435 states have (on average 1.5954022988505747) internal successors, (694), 454 states have internal predecessors, (694), 98 states have call successors, (98), 27 states have call predecessors, (98), 27 states have return successors, (109), 92 states have call predecessors, (109), 93 states have call successors, (109) [2021-11-13 02:34:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 901 transitions. [2021-11-13 02:34:04,619 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 901 transitions. Word has length 136 [2021-11-13 02:34:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:04,620 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 901 transitions. [2021-11-13 02:34:04,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-13 02:34:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 901 transitions. [2021-11-13 02:34:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 02:34:04,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:04,625 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] [2021-11-13 02:34:04,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:04,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:04,852 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:04,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1628364760, now seen corresponding path program 1 times [2021-11-13 02:34:04,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:04,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253211025] [2021-11-13 02:34:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:04,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:04,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:04,854 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:04,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 02:34:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:05,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:34:05,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:34:05,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:34:06,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:06,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253211025] [2021-11-13 02:34:06,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253211025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:06,295 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:06,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-13 02:34:06,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061243083] [2021-11-13 02:34:06,296 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:06,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:34:06,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:06,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:34:06,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:34:06,297 INFO L87 Difference]: Start difference. First operand 561 states and 901 transitions. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-13 02:34:08,319 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:10,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:12,332 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 [] [2021-11-13 02:34:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:19,095 INFO L93 Difference]: Finished difference Result 1958 states and 3314 transitions. [2021-11-13 02:34:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 02:34:19,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) Word has length 137 [2021-11-13 02:34:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:19,108 INFO L225 Difference]: With dead ends: 1958 [2021-11-13 02:34:19,108 INFO L226 Difference]: Without dead ends: 1477 [2021-11-13 02:34:19,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:34:19,114 INFO L933 BasicCegarLoop]: 1432 mSDtfsCounter, 3643 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 5220 mSolverCounterSat, 1146 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11588.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3727 SdHoareTripleChecker+Valid, 3731 SdHoareTripleChecker+Invalid, 6369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.73ms SdHoareTripleChecker+Time, 1146 IncrementalHoareTripleChecker+Valid, 5220 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12485.03ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:19,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3727 Valid, 3731 Invalid, 6369 Unknown, 0 Unchecked, 34.73ms Time], IncrementalHoareTripleChecker [1146 Valid, 5220 Invalid, 3 Unknown, 0 Unchecked, 12485.03ms Time] [2021-11-13 02:34:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-11-13 02:34:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1388. [2021-11-13 02:34:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1068 states have (on average 1.6264044943820224) internal successors, (1737), 1116 states have internal predecessors, (1737), 252 states have call successors, (252), 66 states have call predecessors, (252), 67 states have return successors, (276), 242 states have call predecessors, (276), 247 states have call successors, (276) [2021-11-13 02:34:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2265 transitions. [2021-11-13 02:34:19,188 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2265 transitions. Word has length 137 [2021-11-13 02:34:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:19,188 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 2265 transitions. [2021-11-13 02:34:19,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-13 02:34:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2265 transitions. [2021-11-13 02:34:19,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 02:34:19,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:19,192 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] [2021-11-13 02:34:19,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:19,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:19,407 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2109389614, now seen corresponding path program 1 times [2021-11-13 02:34:19,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:19,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470326205] [2021-11-13 02:34:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:19,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:19,409 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:19,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 02:34:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:19,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:34:19,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:34:22,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:34:25,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:25,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470326205] [2021-11-13 02:34:25,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470326205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:25,471 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:25,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-13 02:34:25,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374730530] [2021-11-13 02:34:25,471 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:25,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:34:25,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:25,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:34:25,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:34:25,473 INFO L87 Difference]: Start difference. First operand 1388 states and 2265 transitions. Second operand has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-13 02:34:27,492 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 [] [2021-11-13 02:34:29,498 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:31,505 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:52,628 INFO L93 Difference]: Finished difference Result 4628 states and 7734 transitions. [2021-11-13 02:34:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:34:52,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 139 [2021-11-13 02:34:52,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:52,652 INFO L225 Difference]: With dead ends: 4628 [2021-11-13 02:34:52,652 INFO L226 Difference]: Without dead ends: 3320 [2021-11-13 02:34:52,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:34:52,658 INFO L933 BasicCegarLoop]: 1043 mSDtfsCounter, 3565 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 4976 mSolverCounterSat, 919 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23018.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3636 SdHoareTripleChecker+Valid, 2860 SdHoareTripleChecker+Invalid, 5898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.79ms SdHoareTripleChecker+Time, 919 IncrementalHoareTripleChecker+Valid, 4976 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26558.31ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:52,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3636 Valid, 2860 Invalid, 5898 Unknown, 0 Unchecked, 31.79ms Time], IncrementalHoareTripleChecker [919 Valid, 4976 Invalid, 3 Unknown, 0 Unchecked, 26558.31ms Time] [2021-11-13 02:34:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2021-11-13 02:34:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2908. [2021-11-13 02:34:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2211 states have (on average 1.637720488466757) internal successors, (3621), 2309 states have internal predecessors, (3621), 577 states have call successors, (577), 114 states have call predecessors, (577), 119 states have return successors, (634), 543 states have call predecessors, (634), 572 states have call successors, (634) [2021-11-13 02:34:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4832 transitions. [2021-11-13 02:34:52,878 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4832 transitions. Word has length 139 [2021-11-13 02:34:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:52,879 INFO L470 AbstractCegarLoop]: Abstraction has 2908 states and 4832 transitions. [2021-11-13 02:34:52,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-13 02:34:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4832 transitions. [2021-11-13 02:34:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:34:52,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:52,882 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, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:52,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:53,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:53,105 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:53,105 INFO L85 PathProgramCache]: Analyzing trace with hash 164239037, now seen corresponding path program 1 times [2021-11-13 02:34:53,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:53,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538818684] [2021-11-13 02:34:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:53,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:53,107 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:53,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 02:34:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:53,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:34:53,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:34:54,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:34:54,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:54,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538818684] [2021-11-13 02:34:54,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538818684] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:54,699 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:54,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-13 02:34:54,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331235246] [2021-11-13 02:34:54,700 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:54,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:34:54,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:54,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:34:54,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:34:54,703 INFO L87 Difference]: Start difference. First operand 2908 states and 4832 transitions. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:34:56,732 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:58,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:00,745 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:02,751 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:04,757 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:06,763 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:21,149 INFO L93 Difference]: Finished difference Result 10664 states and 18285 transitions. [2021-11-13 02:35:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 02:35:21,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) Word has length 143 [2021-11-13 02:35:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:21,222 INFO L225 Difference]: With dead ends: 10664 [2021-11-13 02:35:21,223 INFO L226 Difference]: Without dead ends: 7836 [2021-11-13 02:35:21,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-13 02:35:21,243 INFO L933 BasicCegarLoop]: 1779 mSDtfsCounter, 4956 mSDsluCounter, 3622 mSDsCounter, 0 mSdLazyCounter, 9559 mSolverCounterSat, 2015 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23947.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5069 SdHoareTripleChecker+Valid, 5401 SdHoareTripleChecker+Invalid, 11580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 81.62ms SdHoareTripleChecker+Time, 2015 IncrementalHoareTripleChecker+Valid, 9559 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25582.88ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:21,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5069 Valid, 5401 Invalid, 11580 Unknown, 0 Unchecked, 81.62ms Time], IncrementalHoareTripleChecker [2015 Valid, 9559 Invalid, 6 Unknown, 0 Unchecked, 25582.88ms Time] [2021-11-13 02:35:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7836 states. [2021-11-13 02:35:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7836 to 4688. [2021-11-13 02:35:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 3497 states have (on average 1.6251072347726623) internal successors, (5683), 3672 states have internal predecessors, (5683), 991 states have call successors, (991), 172 states have call predecessors, (991), 199 states have return successors, (1136), 964 states have call predecessors, (1136), 986 states have call successors, (1136) [2021-11-13 02:35:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 7810 transitions. [2021-11-13 02:35:21,752 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 7810 transitions. Word has length 143 [2021-11-13 02:35:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:21,752 INFO L470 AbstractCegarLoop]: Abstraction has 4688 states and 7810 transitions. [2021-11-13 02:35:21,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:35:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 7810 transitions. [2021-11-13 02:35:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 02:35:21,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:21,757 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:21,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-13 02:35:21,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:21,960 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:21,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:21,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1115996212, now seen corresponding path program 1 times [2021-11-13 02:35:21,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:21,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854411718] [2021-11-13 02:35:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:21,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:21,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:21,965 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:21,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 02:35:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:22,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:35:22,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:35:23,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:35:23,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:23,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854411718] [2021-11-13 02:35:23,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854411718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:23,532 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:23,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 02:35:23,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621220978] [2021-11-13 02:35:23,533 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:23,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:35:23,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:35:23,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:35:23,534 INFO L87 Difference]: Start difference. First operand 4688 states and 7810 transitions. Second operand has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:35:25,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:27,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:32,447 INFO L93 Difference]: Finished difference Result 15829 states and 27043 transitions. [2021-11-13 02:35:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:35:32,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 144 [2021-11-13 02:35:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:32,525 INFO L225 Difference]: With dead ends: 15829 [2021-11-13 02:35:32,525 INFO L226 Difference]: Without dead ends: 11224 [2021-11-13 02:35:32,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:35:32,547 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 3231 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 923 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7575.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3343 SdHoareTripleChecker+Valid, 2807 SdHoareTripleChecker+Invalid, 3481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.81ms SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8152.14ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:32,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3343 Valid, 2807 Invalid, 3481 Unknown, 0 Unchecked, 25.81ms Time], IncrementalHoareTripleChecker [923 Valid, 2556 Invalid, 2 Unknown, 0 Unchecked, 8152.14ms Time] [2021-11-13 02:35:32,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11224 states. [2021-11-13 02:35:33,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11224 to 8916. [2021-11-13 02:35:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8916 states, 6509 states have (on average 1.616530957136273) internal successors, (10522), 6873 states have internal predecessors, (10522), 2048 states have call successors, (2048), 288 states have call predecessors, (2048), 358 states have return successors, (2408), 2024 states have call predecessors, (2408), 2043 states have call successors, (2408) [2021-11-13 02:35:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8916 states to 8916 states and 14978 transitions. [2021-11-13 02:35:33,370 INFO L78 Accepts]: Start accepts. Automaton has 8916 states and 14978 transitions. Word has length 144 [2021-11-13 02:35:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:33,371 INFO L470 AbstractCegarLoop]: Abstraction has 8916 states and 14978 transitions. [2021-11-13 02:35:33,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:35:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 8916 states and 14978 transitions. [2021-11-13 02:35:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 02:35:33,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:33,376 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:33,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:33,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:33,592 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:33,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1788715552, now seen corresponding path program 1 times [2021-11-13 02:35:33,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:33,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52592424] [2021-11-13 02:35:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:33,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:33,595 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:33,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 02:35:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:34,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:35:34,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:35:34,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:35:35,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:35,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52592424] [2021-11-13 02:35:35,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52592424] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:35,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:35,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 02:35:35,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225975174] [2021-11-13 02:35:35,507 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:35,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:35:35,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:35,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:35:35,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:35:35,509 INFO L87 Difference]: Start difference. First operand 8916 states and 14978 transitions. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:35:37,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:39,537 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:45,336 INFO L93 Difference]: Finished difference Result 33996 states and 58638 transitions. [2021-11-13 02:35:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:35:45,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 145 [2021-11-13 02:35:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:45,534 INFO L225 Difference]: With dead ends: 33996 [2021-11-13 02:35:45,534 INFO L226 Difference]: Without dead ends: 25165 [2021-11-13 02:35:45,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:35:45,584 INFO L933 BasicCegarLoop]: 1611 mSDtfsCounter, 3269 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 924 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7414.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3382 SdHoareTripleChecker+Valid, 2723 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.99ms SdHoareTripleChecker+Time, 924 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8012.79ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:45,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3382 Valid, 2723 Invalid, 3443 Unknown, 0 Unchecked, 23.99ms Time], IncrementalHoareTripleChecker [924 Valid, 2517 Invalid, 2 Unknown, 0 Unchecked, 8012.79ms Time] [2021-11-13 02:35:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25165 states. [2021-11-13 02:35:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25165 to 19650. [2021-11-13 02:35:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19650 states, 14074 states have (on average 1.609350575529345) internal successors, (22650), 14924 states have internal predecessors, (22650), 4861 states have call successors, (4861), 520 states have call predecessors, (4861), 714 states have return successors, (5848), 4844 states have call predecessors, (5848), 4856 states have call successors, (5848) [2021-11-13 02:35:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19650 states to 19650 states and 33359 transitions. [2021-11-13 02:35:47,809 INFO L78 Accepts]: Start accepts. Automaton has 19650 states and 33359 transitions. Word has length 145 [2021-11-13 02:35:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:47,810 INFO L470 AbstractCegarLoop]: Abstraction has 19650 states and 33359 transitions. [2021-11-13 02:35:47,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:35:47,810 INFO L276 IsEmpty]: Start isEmpty. Operand 19650 states and 33359 transitions. [2021-11-13 02:35:47,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:35:47,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:47,816 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:47,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:48,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:48,040 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:48,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1726699217, now seen corresponding path program 1 times [2021-11-13 02:35:48,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:48,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692692467] [2021-11-13 02:35:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:48,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:48,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:48,043 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:48,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 02:35:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:48,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:35:48,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:35:49,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:35:49,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:49,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692692467] [2021-11-13 02:35:49,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692692467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:49,865 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:49,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 02:35:49,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153721953] [2021-11-13 02:35:49,867 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:49,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:35:49,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:49,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:35:49,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:35:49,869 INFO L87 Difference]: Start difference. First operand 19650 states and 33359 transitions. Second operand has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:35:51,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:53,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:03,657 INFO L93 Difference]: Finished difference Result 82487 states and 143626 transitions. [2021-11-13 02:36:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:36:03,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 146 [2021-11-13 02:36:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:04,378 INFO L225 Difference]: With dead ends: 82487 [2021-11-13 02:36:04,379 INFO L226 Difference]: Without dead ends: 62926 [2021-11-13 02:36:04,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:36:04,500 INFO L933 BasicCegarLoop]: 1619 mSDtfsCounter, 2742 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 2615 mSolverCounterSat, 763 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7653.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2856 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 3380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.10ms SdHoareTripleChecker+Time, 763 IncrementalHoareTripleChecker+Valid, 2615 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8248.64ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:04,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2856 Valid, 2930 Invalid, 3380 Unknown, 0 Unchecked, 24.10ms Time], IncrementalHoareTripleChecker [763 Valid, 2615 Invalid, 2 Unknown, 0 Unchecked, 8248.64ms Time] [2021-11-13 02:36:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62926 states. [2021-11-13 02:36:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62926 to 48360. [2021-11-13 02:36:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48360 states, 34191 states have (on average 1.6043403234769384) internal successors, (54854), 36339 states have internal predecessors, (54854), 12618 states have call successors, (12618), 984 states have call predecessors, (12618), 1550 states have return successors, (15506), 12612 states have call predecessors, (15506), 12613 states have call successors, (15506) [2021-11-13 02:36:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48360 states to 48360 states and 82978 transitions. [2021-11-13 02:36:10,446 INFO L78 Accepts]: Start accepts. Automaton has 48360 states and 82978 transitions. Word has length 146 [2021-11-13 02:36:10,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:10,447 INFO L470 AbstractCegarLoop]: Abstraction has 48360 states and 82978 transitions. [2021-11-13 02:36:10,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:36:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 48360 states and 82978 transitions. [2021-11-13 02:36:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 02:36:10,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:10,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:10,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:10,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:36:10,668 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:10,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:10,668 INFO L85 PathProgramCache]: Analyzing trace with hash -109574971, now seen corresponding path program 1 times [2021-11-13 02:36:10,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:10,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469056030] [2021-11-13 02:36:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:10,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:10,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:10,671 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:10,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aaeafbb-d534-40d9-bd7f-233e4e2e65ee/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 02:36:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:11,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:36:11,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:36:11,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:36:12,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:12,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469056030] [2021-11-13 02:36:12,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469056030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:12,623 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:12,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 02:36:12,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873537671] [2021-11-13 02:36:12,624 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:12,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:36:12,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:36:12,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:36:12,626 INFO L87 Difference]: Start difference. First operand 48360 states and 82978 transitions. Second operand has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:36:14,683 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:16,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:39,713 INFO L93 Difference]: Finished difference Result 218030 states and 382592 transitions. [2021-11-13 02:36:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:36:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 147 [2021-11-13 02:36:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:41,039 INFO L225 Difference]: With dead ends: 218030 [2021-11-13 02:36:41,040 INFO L226 Difference]: Without dead ends: 169767 [2021-11-13 02:36:41,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:36:41,327 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 3782 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 1049 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7821.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3897 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 3631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.45ms SdHoareTripleChecker+Time, 1049 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8566.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:41,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3897 Valid, 2891 Invalid, 3631 Unknown, 0 Unchecked, 26.45ms Time], IncrementalHoareTripleChecker [1049 Valid, 2580 Invalid, 2 Unknown, 0 Unchecked, 8566.09ms Time] [2021-11-13 02:36:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169767 states.