./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/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 c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:50:13,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:50:13,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:50:13,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:50:13,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:50:13,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:50:13,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:50:13,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:50:13,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:50:13,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:50:13,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:50:13,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:50:13,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:50:13,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:50:13,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:50:13,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:50:13,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:50:13,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:50:13,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:50:13,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:50:13,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:50:13,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:50:13,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:50:13,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:50:13,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:50:13,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:50:13,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:50:13,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:50:13,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:50:13,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:50:13,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:50:13,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:50:13,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:50:13,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:50:13,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:50:13,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:50:13,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:50:13,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:50:13,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:50:13,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:50:13,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:50:13,923 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:50:13,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:50:13,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:50:13,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:50:13,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:50:13,952 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:50:13,952 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:50:13,953 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:50:13,953 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:50:13,953 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:50:13,953 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:50:13,953 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:50:13,953 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:50:13,954 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:50:13,954 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:50:13,954 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:50:13,954 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:50:13,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:50:13,955 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:50:13,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:50:13,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:50:13,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:50:13,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:50:13,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:50:13,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:50:13,957 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:50:13,957 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:50:13,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:50:13,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:50:13,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:50:13,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:50:13,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:50:13,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:50:13,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:50:13,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:50:13,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:50:13,959 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:50:13,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:50:13,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:50:13,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:50:13,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:50:13,960 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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d [2021-11-12 23:50:14,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:50:14,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:50:14,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:50:14,233 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:50:14,234 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:50:14,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-12 23:50:14,305 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/data/d92b12a77/ecb0aca39c3142cbae833c54eac4bab8/FLAG2a97cde8f [2021-11-12 23:50:14,956 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:50:14,957 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-12 23:50:14,989 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/data/d92b12a77/ecb0aca39c3142cbae833c54eac4bab8/FLAG2a97cde8f [2021-11-12 23:50:15,115 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/data/d92b12a77/ecb0aca39c3142cbae833c54eac4bab8 [2021-11-12 23:50:15,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:50:15,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:50:15,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:50:15,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:50:15,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:50:15,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:50:15" (1/1) ... [2021-11-12 23:50:15,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d98c80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:15, skipping insertion in model container [2021-11-12 23:50:15,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:50:15" (1/1) ... [2021-11-12 23:50:15,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:50:15,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:50:15,808 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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-12 23:50:15,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:50:15,827 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:50:15,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ac2e8b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:15, skipping insertion in model container [2021-11-12 23:50:15,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:50:15,829 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:50:15,831 INFO L158 Benchmark]: Toolchain (without parser) took 711.03ms. Allocated memory was 96.5MB in the beginning and 125.8MB in the end (delta: 29.4MB). Free memory was 61.0MB in the beginning and 88.5MB in the end (delta: -27.5MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2021-11-12 23:50:15,831 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 96.5MB. Free memory was 64.4MB in the beginning and 64.4MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:50:15,832 INFO L158 Benchmark]: CACSL2BoogieTranslator took 695.89ms. Allocated memory was 96.5MB in the beginning and 125.8MB in the end (delta: 29.4MB). Free memory was 61.0MB in the beginning and 88.5MB in the end (delta: -27.5MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2021-11-12 23:50:15,834 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 96.5MB. Free memory was 64.4MB in the beginning and 64.4MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 695.89ms. Allocated memory was 96.5MB in the beginning and 125.8MB in the end (delta: 29.4MB). Free memory was 61.0MB in the beginning and 88.5MB in the end (delta: -27.5MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2099]: 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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/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 c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:50:17,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:50:17,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:50:18,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:50:18,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:50:18,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:50:18,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:50:18,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:50:18,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:50:18,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:50:18,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:50:18,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:50:18,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:50:18,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:50:18,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:50:18,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:50:18,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:50:18,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:50:18,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:50:18,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:50:18,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:50:18,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:50:18,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:50:18,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:50:18,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:50:18,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:50:18,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:50:18,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:50:18,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:50:18,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:50:18,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:50:18,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:50:18,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:50:18,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:50:18,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:50:18,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:50:18,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:50:18,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:50:18,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:50:18,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:50:18,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:50:18,066 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:50:18,099 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:50:18,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:50:18,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:50:18,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:50:18,104 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:50:18,104 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:50:18,105 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:50:18,105 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:50:18,105 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:50:18,105 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:50:18,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:50:18,106 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:50:18,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:50:18,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:50:18,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:50:18,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:50:18,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:50:18,108 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:50:18,108 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:50:18,108 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:50:18,109 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:50:18,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:50:18,109 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:50:18,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:50:18,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:50:18,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:50:18,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:50:18,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:50:18,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:50:18,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:50:18,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:50:18,112 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:50:18,112 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:50:18,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:50:18,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:50:18,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:50:18,113 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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d [2021-11-12 23:50:18,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:50:18,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:50:18,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:50:18,497 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:50:18,498 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:50:18,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-12 23:50:18,576 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/data/f2348b01e/8a5a636bb2e64cb2b3f48ad9f813a306/FLAG9ee6a4b1b [2021-11-12 23:50:19,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:50:19,291 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2021-11-12 23:50:19,326 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/data/f2348b01e/8a5a636bb2e64cb2b3f48ad9f813a306/FLAG9ee6a4b1b [2021-11-12 23:50:19,511 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/data/f2348b01e/8a5a636bb2e64cb2b3f48ad9f813a306 [2021-11-12 23:50:19,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:50:19,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:50:19,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:50:19,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:50:19,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:50:19,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:50:19" (1/1) ... [2021-11-12 23:50:19,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@163681e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:19, skipping insertion in model container [2021-11-12 23:50:19,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:50:19" (1/1) ... [2021-11-12 23:50:19,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:50:19,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:50:20,197 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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-12 23:50:20,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:50:20,217 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:50:20,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:50:20,363 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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-12 23:50:20,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:50:20,378 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:50:20,471 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_11c2f81e-70a7-4e9e-8731-7b23370dcb30/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2021-11-12 23:50:20,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:50:20,503 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:50:20,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20 WrapperNode [2021-11-12 23:50:20,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:50:20,506 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:50:20,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:50:20,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:50:20,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20" (1/1) ... [2021-11-12 23:50:20,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20" (1/1) ... [2021-11-12 23:50:20,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:50:20,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:50:20,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:50:20,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:50:20,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20" (1/1) ... [2021-11-12 23:50:20,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20" (1/1) ... [2021-11-12 23:50:20,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20" (1/1) ... [2021-11-12 23:50:20,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20" (1/1) ... [2021-11-12 23:50:20,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20" (1/1) ... [2021-11-12 23:50:20,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20" (1/1) ... [2021-11-12 23:50:20,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20" (1/1) ... [2021-11-12 23:50:20,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:50:20,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:50:20,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:50:20,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:50:20,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20" (1/1) ... [2021-11-12 23:50:20,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:50:20,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:50:20,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:50:20,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:50:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:50:20,782 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:50:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:50:20,782 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:50:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:50:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:50:20,783 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:50:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:50:20,783 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:50:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:50:20,783 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:50:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:50:20,783 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:50:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:50:20,784 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:50:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:50:20,784 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:50:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:50:20,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:50:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:50:20,784 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:50:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:50:20,785 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:50:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:50:20,785 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:50:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:50:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:50:20,785 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:50:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:50:20,785 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:50:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2021-11-12 23:50:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2021-11-12 23:50:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:50:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:50:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:50:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:50:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:50:20,793 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:50:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:50:20,793 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:50:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:50:20,793 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:50:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:50:20,794 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:50:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:50:20,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:50:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:50:20,795 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:50:24,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:50:24,752 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:50:24,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:50:24 BoogieIcfgContainer [2021-11-12 23:50:24,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:50:24,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:50:24,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:50:24,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:50:24,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:50:19" (1/3) ... [2021-11-12 23:50:24,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e72b1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:50:24, skipping insertion in model container [2021-11-12 23:50:24,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20" (2/3) ... [2021-11-12 23:50:24,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e72b1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:50:24, skipping insertion in model container [2021-11-12 23:50:24,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:50:24" (3/3) ... [2021-11-12 23:50:24,766 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product26.cil.c [2021-11-12 23:50:24,772 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:50:24,773 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:50:24,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:50:24,844 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:50:24,844 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:50:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 550 states, 435 states have (on average 1.7080459770114942) internal successors, (743), 458 states have internal predecessors, (743), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 23:50:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-12 23:50:24,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:24,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:50:24,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:24,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1191959459, now seen corresponding path program 1 times [2021-11-12 23:50:24,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:24,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255814986] [2021-11-12 23:50:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:24,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:24,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:24,912 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:24,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:50:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:25,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:50:25,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:25,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:25,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:25,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255814986] [2021-11-12 23:50:25,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255814986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:25,840 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:25,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:50:25,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699900512] [2021-11-12 23:50:25,843 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:25,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:50:25,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:25,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:50:25,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:50:25,889 INFO L87 Difference]: Start difference. First operand has 550 states, 435 states have (on average 1.7080459770114942) internal successors, (743), 458 states have internal predecessors, (743), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-12 23:50:26,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:26,004 INFO L93 Difference]: Finished difference Result 571 states and 955 transitions. [2021-11-12 23:50:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:50:26,006 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2021-11-12 23:50:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:26,040 INFO L225 Difference]: With dead ends: 571 [2021-11-12 23:50:26,040 INFO L226 Difference]: Without dead ends: 542 [2021-11-12 23:50:26,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:50:26,050 INFO L933 BasicCegarLoop]: 916 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, 916 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:26,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 10.83ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:50:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-12 23:50:26,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-11-12 23:50:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 429 states have (on average 1.7062937062937062) internal successors, (732), 450 states have internal predecessors, (732), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 23:50:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 909 transitions. [2021-11-12 23:50:26,214 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 909 transitions. Word has length 56 [2021-11-12 23:50:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:26,216 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 909 transitions. [2021-11-12 23:50:26,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-12 23:50:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 909 transitions. [2021-11-12 23:50:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:50:26,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:26,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:50:26,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:26,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:26,441 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:26,442 INFO L85 PathProgramCache]: Analyzing trace with hash -479138185, now seen corresponding path program 1 times [2021-11-12 23:50:26,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:26,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668768812] [2021-11-12 23:50:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:26,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:26,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:26,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:26,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:50:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:26,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:27,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:27,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:27,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668768812] [2021-11-12 23:50:27,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668768812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:27,381 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:27,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:50:27,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718072393] [2021-11-12 23:50:27,382 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:27,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:50:27,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:27,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:50:27,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:27,385 INFO L87 Difference]: Start difference. First operand 542 states and 909 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:50:27,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:27,514 INFO L93 Difference]: Finished difference Result 1068 states and 1796 transitions. [2021-11-12 23:50:27,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:50:27,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 58 [2021-11-12 23:50:27,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:27,522 INFO L225 Difference]: With dead ends: 1068 [2021-11-12 23:50:27,522 INFO L226 Difference]: Without dead ends: 542 [2021-11-12 23:50:27,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:50:27,530 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 25 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.59ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:27,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 2684 Invalid, 34 Unknown, 0 Unchecked, 13.59ms Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 38.93ms Time] [2021-11-12 23:50:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-12 23:50:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-11-12 23:50:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 429 states have (on average 1.6923076923076923) internal successors, (726), 450 states have internal predecessors, (726), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 23:50:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 903 transitions. [2021-11-12 23:50:27,570 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 903 transitions. Word has length 58 [2021-11-12 23:50:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:27,570 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 903 transitions. [2021-11-12 23:50:27,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:50:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 903 transitions. [2021-11-12 23:50:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 23:50:27,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:27,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:50:27,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:27,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:27,789 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash 787490035, now seen corresponding path program 1 times [2021-11-12 23:50:27,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:27,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958048611] [2021-11-12 23:50:27,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:27,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:27,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:27,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:27,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:50:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:28,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:50:28,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:28,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:28,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:28,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958048611] [2021-11-12 23:50:28,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958048611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:28,877 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:28,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:50:28,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489103330] [2021-11-12 23:50:28,877 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:28,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:50:28,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:28,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:50:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:50:28,879 INFO L87 Difference]: Start difference. First operand 542 states and 903 transitions. Second operand has 11 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 4 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:50:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:29,063 INFO L93 Difference]: Finished difference Result 1026 states and 1713 transitions. [2021-11-12 23:50:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:50:29,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 4 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 63 [2021-11-12 23:50:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:29,070 INFO L225 Difference]: With dead ends: 1026 [2021-11-12 23:50:29,071 INFO L226 Difference]: Without dead ends: 536 [2021-11-12 23:50:29,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:50:29,075 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 214 mSDsluCounter, 4429 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 5319 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.22ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:29,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 5319 Invalid, 79 Unknown, 0 Unchecked, 14.22ms Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 100.00ms Time] [2021-11-12 23:50:29,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-12 23:50:29,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2021-11-12 23:50:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 423 states have (on average 1.6855791962174942) internal successors, (713), 444 states have internal predecessors, (713), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 23:50:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 890 transitions. [2021-11-12 23:50:29,107 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 890 transitions. Word has length 63 [2021-11-12 23:50:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:29,107 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 890 transitions. [2021-11-12 23:50:29,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 4 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:50:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 890 transitions. [2021-11-12 23:50:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-12 23:50:29,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:29,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:50:29,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:29,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:29,330 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:29,330 INFO L85 PathProgramCache]: Analyzing trace with hash 184275301, now seen corresponding path program 1 times [2021-11-12 23:50:29,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:29,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004022664] [2021-11-12 23:50:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:29,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:29,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:29,333 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:29,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:50:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:29,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:29,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:30,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:30,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:30,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004022664] [2021-11-12 23:50:30,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004022664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:30,268 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:30,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:50:30,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963177194] [2021-11-12 23:50:30,269 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:30,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:50:30,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:30,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:50:30,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:30,271 INFO L87 Difference]: Start difference. First operand 536 states and 890 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:30,458 INFO L93 Difference]: Finished difference Result 1029 states and 1714 transitions. [2021-11-12 23:50:30,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:50:30,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2021-11-12 23:50:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:30,466 INFO L225 Difference]: With dead ends: 1029 [2021-11-12 23:50:30,466 INFO L226 Difference]: Without dead ends: 536 [2021-11-12 23:50:30,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:50:30,477 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 215 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:30,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1693 Invalid, 122 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [26 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 122.42ms Time] [2021-11-12 23:50:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-12 23:50:30,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2021-11-12 23:50:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 423 states have (on average 1.6288416075650118) internal successors, (689), 444 states have internal predecessors, (689), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 23:50:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 866 transitions. [2021-11-12 23:50:30,534 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 866 transitions. Word has length 64 [2021-11-12 23:50:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:30,534 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 866 transitions. [2021-11-12 23:50:30,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 866 transitions. [2021-11-12 23:50:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-12 23:50:30,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:30,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:50:30,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:30,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:30,752 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:30,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:30,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1915797430, now seen corresponding path program 1 times [2021-11-12 23:50:30,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:30,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405908701] [2021-11-12 23:50:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:30,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:30,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:30,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:30,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:50:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:31,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:50:31,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:31,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:31,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:31,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405908701] [2021-11-12 23:50:31,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405908701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:31,810 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:31,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:50:31,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262410950] [2021-11-12 23:50:31,810 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:31,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:50:31,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:31,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:50:31,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:50:31,812 INFO L87 Difference]: Start difference. First operand 536 states and 866 transitions. Second operand has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:50:31,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:31,982 INFO L93 Difference]: Finished difference Result 1020 states and 1676 transitions. [2021-11-12 23:50:31,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:50:31,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-11-12 23:50:31,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:31,988 INFO L225 Difference]: With dead ends: 1020 [2021-11-12 23:50:31,989 INFO L226 Difference]: Without dead ends: 515 [2021-11-12 23:50:31,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:50:31,992 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 89 mSDsluCounter, 5023 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5877 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:31,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 5877 Invalid, 60 Unknown, 0 Unchecked, 32.81ms Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 87.52ms Time] [2021-11-12 23:50:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-11-12 23:50:32,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2021-11-12 23:50:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 402 states have (on average 1.6517412935323383) internal successors, (664), 423 states have internal predecessors, (664), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 23:50:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 841 transitions. [2021-11-12 23:50:32,018 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 841 transitions. Word has length 66 [2021-11-12 23:50:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:32,018 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 841 transitions. [2021-11-12 23:50:32,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:50:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 841 transitions. [2021-11-12 23:50:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:50:32,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:32,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:50:32,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:32,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:32,237 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash 656050912, now seen corresponding path program 1 times [2021-11-12 23:50:32,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:32,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347360162] [2021-11-12 23:50:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:32,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:32,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:32,240 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:32,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:50:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:50:32,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:32,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:33,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:33,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347360162] [2021-11-12 23:50:33,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347360162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:33,439 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:33,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:50:33,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390812944] [2021-11-12 23:50:33,439 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:33,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:50:33,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:33,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:50:33,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:50:33,441 INFO L87 Difference]: Start difference. First operand 515 states and 841 transitions. Second operand has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:50:33,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:33,673 INFO L93 Difference]: Finished difference Result 993 states and 1640 transitions. [2021-11-12 23:50:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:50:33,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-11-12 23:50:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:33,679 INFO L225 Difference]: With dead ends: 993 [2021-11-12 23:50:33,679 INFO L226 Difference]: Without dead ends: 515 [2021-11-12 23:50:33,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:50:33,684 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 44 mSDsluCounter, 7399 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8225 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:33,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 8225 Invalid, 116 Unknown, 0 Unchecked, 18.42ms Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 129.29ms Time] [2021-11-12 23:50:33,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-11-12 23:50:33,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2021-11-12 23:50:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 402 states have (on average 1.6492537313432836) internal successors, (663), 423 states have internal predecessors, (663), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 23:50:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 840 transitions. [2021-11-12 23:50:33,710 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 840 transitions. Word has length 69 [2021-11-12 23:50:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:33,710 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 840 transitions. [2021-11-12 23:50:33,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:50:33,711 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 840 transitions. [2021-11-12 23:50:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:50:33,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:33,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:50:33,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:33,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:33,930 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:33,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:33,930 INFO L85 PathProgramCache]: Analyzing trace with hash -234358428, now seen corresponding path program 1 times [2021-11-12 23:50:33,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:33,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407403777] [2021-11-12 23:50:33,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:33,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:33,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:33,932 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:33,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:50:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:34,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:50:34,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:35,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:35,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:35,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407403777] [2021-11-12 23:50:35,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407403777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:35,496 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:35,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 23:50:35,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791023402] [2021-11-12 23:50:35,496 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:35,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:50:35,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:50:35,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:50:35,498 INFO L87 Difference]: Start difference. First operand 515 states and 840 transitions. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-12 23:50:37,537 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:39,546 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:45,325 INFO L93 Difference]: Finished difference Result 2044 states and 3430 transitions. [2021-11-12 23:50:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:50:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2021-11-12 23:50:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:45,341 INFO L225 Difference]: With dead ends: 2044 [2021-11-12 23:50:45,342 INFO L226 Difference]: Without dead ends: 1574 [2021-11-12 23:50:45,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:50:45,346 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 4901 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 1160 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8676.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5009 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 3544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.71ms SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9487.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:45,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5009 Valid, 1892 Invalid, 3544 Unknown, 0 Unchecked, 41.71ms Time], IncrementalHoareTripleChecker [1160 Valid, 2382 Invalid, 2 Unknown, 0 Unchecked, 9487.10ms Time] [2021-11-12 23:50:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-11-12 23:50:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1370. [2021-11-12 23:50:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1085 states have (on average 1.6866359447004609) internal successors, (1830), 1124 states have internal predecessors, (1830), 234 states have call successors, (234), 49 states have call predecessors, (234), 50 states have return successors, (239), 210 states have call predecessors, (239), 229 states have call successors, (239) [2021-11-12 23:50:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 2303 transitions. [2021-11-12 23:50:45,436 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 2303 transitions. Word has length 70 [2021-11-12 23:50:45,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:45,436 INFO L470 AbstractCegarLoop]: Abstraction has 1370 states and 2303 transitions. [2021-11-12 23:50:45,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-12 23:50:45,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 2303 transitions. [2021-11-12 23:50:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:50:45,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:45,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:50:45,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:45,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:45,655 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:45,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1058684563, now seen corresponding path program 1 times [2021-11-12 23:50:45,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:45,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85282935] [2021-11-12 23:50:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:45,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:45,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:45,657 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:45,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:50:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:46,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:50:46,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:46,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:47,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:47,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85282935] [2021-11-12 23:50:47,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85282935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:47,097 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:47,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:50:47,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398204619] [2021-11-12 23:50:47,097 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:47,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:50:47,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:47,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:50:47,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:50:47,099 INFO L87 Difference]: Start difference. First operand 1370 states and 2303 transitions. Second operand has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 11 states have internal predecessors, (116), 7 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-12 23:50:49,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:51,139 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:01,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:01,349 INFO L93 Difference]: Finished difference Result 4396 states and 7432 transitions. [2021-11-12 23:51:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:51:01,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 11 states have internal predecessors, (116), 7 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 98 [2021-11-12 23:51:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:01,380 INFO L225 Difference]: With dead ends: 4396 [2021-11-12 23:51:01,380 INFO L226 Difference]: Without dead ends: 3071 [2021-11-12 23:51:01,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:51:01,410 INFO L933 BasicCegarLoop]: 1722 mSDtfsCounter, 2456 mSDsluCounter, 4009 mSDsCounter, 0 mSdLazyCounter, 7720 mSolverCounterSat, 808 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12120.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2542 SdHoareTripleChecker+Valid, 5731 SdHoareTripleChecker+Invalid, 8530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 64.19ms SdHoareTripleChecker+Time, 808 IncrementalHoareTripleChecker+Valid, 7720 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13525.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:01,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2542 Valid, 5731 Invalid, 8530 Unknown, 0 Unchecked, 64.19ms Time], IncrementalHoareTripleChecker [808 Valid, 7720 Invalid, 2 Unknown, 0 Unchecked, 13525.44ms Time] [2021-11-12 23:51:01,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-11-12 23:51:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 2713. [2021-11-12 23:51:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2058 states have (on average 1.6491739552964042) internal successors, (3394), 2150 states have internal predecessors, (3394), 553 states have call successors, (553), 84 states have call predecessors, (553), 101 states have return successors, (589), 511 states have call predecessors, (589), 548 states have call successors, (589) [2021-11-12 23:51:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 4536 transitions. [2021-11-12 23:51:01,676 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 4536 transitions. Word has length 98 [2021-11-12 23:51:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:01,676 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 4536 transitions. [2021-11-12 23:51:01,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 11 states have internal predecessors, (116), 7 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-12 23:51:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 4536 transitions. [2021-11-12 23:51:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:51:01,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:01,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:01,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 23:51:01,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:01,897 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:01,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1907481295, now seen corresponding path program 1 times [2021-11-12 23:51:01,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:01,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371073811] [2021-11-12 23:51:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:01,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:01,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:01,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:01,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:51:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:02,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:51:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:02,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:03,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:03,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371073811] [2021-11-12 23:51:03,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371073811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:03,871 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:03,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 23:51:03,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723668112] [2021-11-12 23:51:03,872 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:03,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:51:03,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:03,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:51:03,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:51:03,874 INFO L87 Difference]: Start difference. First operand 2713 states and 4536 transitions. Second operand has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 12 states have internal predecessors, (134), 6 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (20), 8 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 23:51:05,898 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:07,905 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:11,480 INFO L93 Difference]: Finished difference Result 6164 states and 10499 transitions. [2021-11-12 23:51:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:51:11,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 12 states have internal predecessors, (134), 6 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (20), 8 states have call predecessors, (20), 5 states have call successors, (20) Word has length 99 [2021-11-12 23:51:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:11,523 INFO L225 Difference]: With dead ends: 6164 [2021-11-12 23:51:11,524 INFO L226 Difference]: Without dead ends: 3496 [2021-11-12 23:51:11,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:51:11,554 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 1495 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 2624 mSolverCounterSat, 583 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6741.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 3209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.51ms SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 2624 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7236.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:11,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1495 Valid, 2328 Invalid, 3209 Unknown, 0 Unchecked, 17.51ms Time], IncrementalHoareTripleChecker [583 Valid, 2624 Invalid, 2 Unknown, 0 Unchecked, 7236.30ms Time] [2021-11-12 23:51:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-11-12 23:51:11,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 2737. [2021-11-12 23:51:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2076 states have (on average 1.6435452793834298) internal successors, (3412), 2168 states have internal predecessors, (3412), 553 states have call successors, (553), 84 states have call predecessors, (553), 107 states have return successors, (655), 517 states have call predecessors, (655), 548 states have call successors, (655) [2021-11-12 23:51:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 4620 transitions. [2021-11-12 23:51:11,852 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 4620 transitions. Word has length 99 [2021-11-12 23:51:11,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:11,853 INFO L470 AbstractCegarLoop]: Abstraction has 2737 states and 4620 transitions. [2021-11-12 23:51:11,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 12 states have internal predecessors, (134), 6 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (20), 8 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 23:51:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 4620 transitions. [2021-11-12 23:51:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 23:51:11,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:11,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:11,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:12,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:12,072 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:12,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1495352814, now seen corresponding path program 1 times [2021-11-12 23:51:12,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:12,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041342801] [2021-11-12 23:51:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:12,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:12,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:12,075 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:12,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:51:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:12,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:51:12,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:12,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:13,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:13,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041342801] [2021-11-12 23:51:13,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041342801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:13,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:13,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:51:13,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924804047] [2021-11-12 23:51:13,613 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:13,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:51:13,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:13,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:51:13,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:51:13,615 INFO L87 Difference]: Start difference. First operand 2737 states and 4620 transitions. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 6 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2021-11-12 23:51:15,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:17,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:23,776 INFO L93 Difference]: Finished difference Result 8969 states and 15489 transitions. [2021-11-12 23:51:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:51:23,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 6 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 100 [2021-11-12 23:51:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:23,842 INFO L225 Difference]: With dead ends: 8969 [2021-11-12 23:51:23,842 INFO L226 Difference]: Without dead ends: 6277 [2021-11-12 23:51:23,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:51:23,873 INFO L933 BasicCegarLoop]: 1405 mSDtfsCounter, 3887 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 4010 mSolverCounterSat, 1014 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8805.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3962 SdHoareTripleChecker+Valid, 3502 SdHoareTripleChecker+Invalid, 5026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.85ms SdHoareTripleChecker+Time, 1014 IncrementalHoareTripleChecker+Valid, 4010 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9574.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:23,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3962 Valid, 3502 Invalid, 5026 Unknown, 0 Unchecked, 36.85ms Time], IncrementalHoareTripleChecker [1014 Valid, 4010 Invalid, 2 Unknown, 0 Unchecked, 9574.22ms Time] [2021-11-12 23:51:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2021-11-12 23:51:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 5971. [2021-11-12 23:51:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5971 states, 4534 states have (on average 1.6376268195853552) internal successors, (7425), 4754 states have internal predecessors, (7425), 1186 states have call successors, (1186), 212 states have call predecessors, (1186), 250 states have return successors, (1360), 1081 states have call predecessors, (1360), 1181 states have call successors, (1360) [2021-11-12 23:51:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5971 states to 5971 states and 9971 transitions. [2021-11-12 23:51:24,461 INFO L78 Accepts]: Start accepts. Automaton has 5971 states and 9971 transitions. Word has length 100 [2021-11-12 23:51:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:24,462 INFO L470 AbstractCegarLoop]: Abstraction has 5971 states and 9971 transitions. [2021-11-12 23:51:24,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 6 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2021-11-12 23:51:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5971 states and 9971 transitions. [2021-11-12 23:51:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:51:24,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:24,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:24,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:24,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:24,680 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:24,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1782125928, now seen corresponding path program 1 times [2021-11-12 23:51:24,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:24,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106024740] [2021-11-12 23:51:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:24,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:24,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:24,683 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:24,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:51:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:51:25,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:25,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:26,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:26,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106024740] [2021-11-12 23:51:26,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106024740] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:26,163 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:26,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:51:26,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611401653] [2021-11-12 23:51:26,163 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:26,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:51:26,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:26,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:51:26,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:51:26,164 INFO L87 Difference]: Start difference. First operand 5971 states and 9971 transitions. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-12 23:51:28,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:30,194 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:32,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:38,658 INFO L93 Difference]: Finished difference Result 17797 states and 30303 transitions. [2021-11-12 23:51:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:51:38,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2021-11-12 23:51:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:38,859 INFO L225 Difference]: With dead ends: 17797 [2021-11-12 23:51:38,860 INFO L226 Difference]: Without dead ends: 12749 [2021-11-12 23:51:38,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:51:38,905 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 3999 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 4211 mSolverCounterSat, 958 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10815.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4073 SdHoareTripleChecker+Valid, 2947 SdHoareTripleChecker+Invalid, 5172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.29ms SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 4211 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11600.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:38,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4073 Valid, 2947 Invalid, 5172 Unknown, 0 Unchecked, 33.29ms Time], IncrementalHoareTripleChecker [958 Valid, 4211 Invalid, 3 Unknown, 0 Unchecked, 11600.39ms Time] [2021-11-12 23:51:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12749 states. [2021-11-12 23:51:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12749 to 12046. [2021-11-12 23:51:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12046 states, 9116 states have (on average 1.6358051777095217) internal successors, (14912), 9607 states have internal predecessors, (14912), 2357 states have call successors, (2357), 407 states have call predecessors, (2357), 572 states have return successors, (3041), 2174 states have call predecessors, (3041), 2352 states have call successors, (3041) [2021-11-12 23:51:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12046 states to 12046 states and 20310 transitions. [2021-11-12 23:51:40,069 INFO L78 Accepts]: Start accepts. Automaton has 12046 states and 20310 transitions. Word has length 102 [2021-11-12 23:51:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:40,070 INFO L470 AbstractCegarLoop]: Abstraction has 12046 states and 20310 transitions. [2021-11-12 23:51:40,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-12 23:51:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 12046 states and 20310 transitions. [2021-11-12 23:51:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:51:40,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:40,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:40,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:40,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:40,288 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:40,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1068349879, now seen corresponding path program 1 times [2021-11-12 23:51:40,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:40,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687116757] [2021-11-12 23:51:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:40,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:40,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:40,291 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:40,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:51:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:40,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:51:40,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:41,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:42,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:42,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687116757] [2021-11-12 23:51:42,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687116757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:42,519 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:42,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:51:42,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985987811] [2021-11-12 23:51:42,519 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:42,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:51:42,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:42,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:51:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:51:42,521 INFO L87 Difference]: Start difference. First operand 12046 states and 20310 transitions. Second operand has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 12 states have internal predecessors, (135), 7 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-12 23:51:44,547 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:46,553 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:48,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:50,564 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:52,570 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:54,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:05,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:05,318 INFO L93 Difference]: Finished difference Result 33921 states and 57748 transitions. [2021-11-12 23:52:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:52:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 12 states have internal predecessors, (135), 7 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) Word has length 107 [2021-11-12 23:52:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:05,502 INFO L225 Difference]: With dead ends: 33921 [2021-11-12 23:52:05,503 INFO L226 Difference]: Without dead ends: 22498 [2021-11-12 23:52:05,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:52:05,564 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 4663 mSDsluCounter, 2679 mSDsCounter, 0 mSdLazyCounter, 7018 mSolverCounterSat, 1270 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19740.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4737 SdHoareTripleChecker+Valid, 3643 SdHoareTripleChecker+Invalid, 8294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.22ms SdHoareTripleChecker+Time, 1270 IncrementalHoareTripleChecker+Valid, 7018 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20914.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:05,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4737 Valid, 3643 Invalid, 8294 Unknown, 0 Unchecked, 42.22ms Time], IncrementalHoareTripleChecker [1270 Valid, 7018 Invalid, 6 Unknown, 0 Unchecked, 20914.68ms Time] [2021-11-12 23:52:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22498 states. [2021-11-12 23:52:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22498 to 22140. [2021-11-12 23:52:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22140 states, 16614 states have (on average 1.6149030937763331) internal successors, (26830), 17511 states have internal predecessors, (26830), 4423 states have call successors, (4423), 785 states have call predecessors, (4423), 1102 states have return successors, (5922), 4118 states have call predecessors, (5922), 4418 states have call successors, (5922) [2021-11-12 23:52:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22140 states to 22140 states and 37175 transitions. [2021-11-12 23:52:07,468 INFO L78 Accepts]: Start accepts. Automaton has 22140 states and 37175 transitions. Word has length 107 [2021-11-12 23:52:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:07,469 INFO L470 AbstractCegarLoop]: Abstraction has 22140 states and 37175 transitions. [2021-11-12 23:52:07,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 12 states have internal predecessors, (135), 7 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-12 23:52:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 22140 states and 37175 transitions. [2021-11-12 23:52:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:52:07,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:07,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:07,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:07,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:07,688 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:07,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:07,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2066356244, now seen corresponding path program 1 times [2021-11-12 23:52:07,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:07,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874737202] [2021-11-12 23:52:07,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:07,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:07,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:07,691 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:07,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:52:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:08,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:08,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:08,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:08,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:08,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874737202] [2021-11-12 23:52:08,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874737202] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:08,926 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:08,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:52:08,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268419358] [2021-11-12 23:52:08,927 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:08,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:52:08,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:08,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:52:08,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:52:08,929 INFO L87 Difference]: Start difference. First operand 22140 states and 37175 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:52:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:10,520 INFO L93 Difference]: Finished difference Result 45173 states and 77041 transitions. [2021-11-12 23:52:10,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:52:10,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 114 [2021-11-12 23:52:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:10,835 INFO L225 Difference]: With dead ends: 45173 [2021-11-12 23:52:10,846 INFO L226 Difference]: Without dead ends: 22140 [2021-11-12 23:52:10,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:52:10,941 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 436 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.30ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:10,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 2362 Invalid, 94 Unknown, 0 Unchecked, 4.30ms Time], IncrementalHoareTripleChecker [37 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 108.87ms Time] [2021-11-12 23:52:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22140 states. [2021-11-12 23:52:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22140 to 22140. [2021-11-12 23:52:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22140 states, 16614 states have (on average 1.5934753822077765) internal successors, (26474), 17511 states have internal predecessors, (26474), 4423 states have call successors, (4423), 785 states have call predecessors, (4423), 1102 states have return successors, (5922), 4118 states have call predecessors, (5922), 4418 states have call successors, (5922) [2021-11-12 23:52:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22140 states to 22140 states and 36819 transitions. [2021-11-12 23:52:12,778 INFO L78 Accepts]: Start accepts. Automaton has 22140 states and 36819 transitions. Word has length 114 [2021-11-12 23:52:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:12,779 INFO L470 AbstractCegarLoop]: Abstraction has 22140 states and 36819 transitions. [2021-11-12 23:52:12,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:52:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 22140 states and 36819 transitions. [2021-11-12 23:52:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:52:12,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:12,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:12,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:13,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:13,005 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:13,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1684031932, now seen corresponding path program 1 times [2021-11-12 23:52:13,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:13,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485529945] [2021-11-12 23:52:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:13,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:13,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:13,009 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:13,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:52:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:13,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:52:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:52:13,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:52:14,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:14,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485529945] [2021-11-12 23:52:14,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485529945] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:14,908 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:14,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 23:52:14,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389726250] [2021-11-12 23:52:14,909 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:14,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:52:14,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:14,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:52:14,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:52:14,911 INFO L87 Difference]: Start difference. First operand 22140 states and 36819 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:52:16,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:18,948 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:25,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:25,187 INFO L93 Difference]: Finished difference Result 46091 states and 77233 transitions. [2021-11-12 23:52:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:52:25,188 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) Word has length 119 [2021-11-12 23:52:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:25,389 INFO L225 Difference]: With dead ends: 46091 [2021-11-12 23:52:25,389 INFO L226 Difference]: Without dead ends: 24987 [2021-11-12 23:52:25,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:52:25,483 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 3408 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 3517 mSolverCounterSat, 879 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7889.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3484 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 4398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.79ms SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 3517 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8522.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:25,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3484 Valid, 2371 Invalid, 4398 Unknown, 0 Unchecked, 23.79ms Time], IncrementalHoareTripleChecker [879 Valid, 3517 Invalid, 2 Unknown, 0 Unchecked, 8522.07ms Time] [2021-11-12 23:52:25,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24987 states. [2021-11-12 23:52:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24987 to 23244. [2021-11-12 23:52:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23244 states, 17442 states have (on average 1.5811260176585253) internal successors, (27578), 18399 states have internal predecessors, (27578), 4537 states have call successors, (4537), 881 states have call predecessors, (4537), 1264 states have return successors, (6204), 4238 states have call predecessors, (6204), 4532 states have call successors, (6204) [2021-11-12 23:52:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23244 states to 23244 states and 38319 transitions. [2021-11-12 23:52:27,579 INFO L78 Accepts]: Start accepts. Automaton has 23244 states and 38319 transitions. Word has length 119 [2021-11-12 23:52:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:27,580 INFO L470 AbstractCegarLoop]: Abstraction has 23244 states and 38319 transitions. [2021-11-12 23:52:27,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:52:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 23244 states and 38319 transitions. [2021-11-12 23:52:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:52:27,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:27,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:27,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:27,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:27,806 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1766235047, now seen corresponding path program 1 times [2021-11-12 23:52:27,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:27,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154460263] [2021-11-12 23:52:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:27,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:27,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:27,811 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:27,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:52:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:28,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:52:28,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:52:28,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:52:30,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:30,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154460263] [2021-11-12 23:52:30,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154460263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:30,042 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:30,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:52:30,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176825177] [2021-11-12 23:52:30,043 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:30,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:52:30,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:30,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:52:30,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:52:30,044 INFO L87 Difference]: Start difference. First operand 23244 states and 38319 transitions. Second operand has 13 states, 13 states have (on average 11.923076923076923) internal successors, (155), 13 states have internal predecessors, (155), 5 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 23:52:32,067 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:34,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:36,081 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:45,467 INFO L93 Difference]: Finished difference Result 60561 states and 103904 transitions. [2021-11-12 23:52:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:52:45,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.923076923076923) internal successors, (155), 13 states have internal predecessors, (155), 5 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 4 states have call successors, (24) Word has length 124 [2021-11-12 23:52:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:45,751 INFO L225 Difference]: With dead ends: 60561 [2021-11-12 23:52:45,751 INFO L226 Difference]: Without dead ends: 35990 [2021-11-12 23:52:45,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:52:45,891 INFO L933 BasicCegarLoop]: 1104 mSDtfsCounter, 2316 mSDsluCounter, 2707 mSDsCounter, 0 mSdLazyCounter, 5098 mSolverCounterSat, 577 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12019.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2409 SdHoareTripleChecker+Valid, 3811 SdHoareTripleChecker+Invalid, 5678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.27ms SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 5098 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12879.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:45,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2409 Valid, 3811 Invalid, 5678 Unknown, 0 Unchecked, 28.27ms Time], IncrementalHoareTripleChecker [577 Valid, 5098 Invalid, 3 Unknown, 0 Unchecked, 12879.61ms Time] [2021-11-12 23:52:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35990 states. [2021-11-12 23:52:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35990 to 34076. [2021-11-12 23:52:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34076 states, 25494 states have (on average 1.5721346199105672) internal successors, (40080), 26979 states have internal predecessors, (40080), 6775 states have call successors, (6775), 1319 states have call predecessors, (6775), 1806 states have return successors, (9899), 6184 states have call predecessors, (9899), 6770 states have call successors, (9899) [2021-11-12 23:52:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34076 states to 34076 states and 56754 transitions. [2021-11-12 23:52:48,505 INFO L78 Accepts]: Start accepts. Automaton has 34076 states and 56754 transitions. Word has length 124 [2021-11-12 23:52:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:48,506 INFO L470 AbstractCegarLoop]: Abstraction has 34076 states and 56754 transitions. [2021-11-12 23:52:48,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.923076923076923) internal successors, (155), 13 states have internal predecessors, (155), 5 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 23:52:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 34076 states and 56754 transitions. [2021-11-12 23:52:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:52:48,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:48,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:48,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:48,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:48,728 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:48,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1687726051, now seen corresponding path program 1 times [2021-11-12 23:52:48,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:48,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294486954] [2021-11-12 23:52:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:48,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:48,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:48,731 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:48,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:52:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:49,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:52:49,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:52:49,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:52:50,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:50,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294486954] [2021-11-12 23:52:50,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294486954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:50,631 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:50,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:52:50,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550607064] [2021-11-12 23:52:50,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:50,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:52:50,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:50,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:52:50,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:52:50,634 INFO L87 Difference]: Start difference. First operand 34076 states and 56754 transitions. Second operand has 13 states, 13 states have (on average 11.538461538461538) internal successors, (150), 11 states have internal predecessors, (150), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 9 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 23:52:52,657 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:54,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:07,992 INFO L93 Difference]: Finished difference Result 92872 states and 157857 transitions. [2021-11-12 23:53:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:53:07,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.538461538461538) internal successors, (150), 11 states have internal predecessors, (150), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 9 states have call predecessors, (24), 5 states have call successors, (24) Word has length 124 [2021-11-12 23:53:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:08,557 INFO L225 Difference]: With dead ends: 92872 [2021-11-12 23:53:08,557 INFO L226 Difference]: Without dead ends: 59829 [2021-11-12 23:53:08,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:53:08,693 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 3690 mSDsluCounter, 3122 mSDsCounter, 0 mSdLazyCounter, 7432 mSolverCounterSat, 1001 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12215.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3761 SdHoareTripleChecker+Valid, 4006 SdHoareTripleChecker+Invalid, 8435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.93ms SdHoareTripleChecker+Time, 1001 IncrementalHoareTripleChecker+Valid, 7432 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13346.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:08,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3761 Valid, 4006 Invalid, 8435 Unknown, 0 Unchecked, 42.93ms Time], IncrementalHoareTripleChecker [1001 Valid, 7432 Invalid, 2 Unknown, 0 Unchecked, 13346.99ms Time] [2021-11-12 23:53:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59829 states. [2021-11-12 23:53:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59829 to 59599. [2021-11-12 23:53:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59599 states, 44394 states have (on average 1.5796053520746047) internal successors, (70125), 46904 states have internal predecessors, (70125), 12308 states have call successors, (12308), 2391 states have call predecessors, (12308), 2896 states have return successors, (16858), 11106 states have call predecessors, (16858), 12303 states have call successors, (16858) [2021-11-12 23:53:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59599 states to 59599 states and 99291 transitions. [2021-11-12 23:53:12,991 INFO L78 Accepts]: Start accepts. Automaton has 59599 states and 99291 transitions. Word has length 124 [2021-11-12 23:53:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:12,992 INFO L470 AbstractCegarLoop]: Abstraction has 59599 states and 99291 transitions. [2021-11-12 23:53:12,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.538461538461538) internal successors, (150), 11 states have internal predecessors, (150), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 9 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 23:53:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand 59599 states and 99291 transitions. [2021-11-12 23:53:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:53:12,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:12,998 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:53:13,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:13,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:13,198 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:13,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1921622203, now seen corresponding path program 1 times [2021-11-12 23:53:13,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:13,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232819474] [2021-11-12 23:53:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:13,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:13,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:13,200 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:13,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:53:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:13,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:53:13,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:53:14,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:53:14,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:14,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232819474] [2021-11-12 23:53:14,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232819474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:14,627 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:14,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-12 23:53:14,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696310889] [2021-11-12 23:53:14,627 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:14,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:53:14,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:14,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:53:14,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:53:14,629 INFO L87 Difference]: Start difference. First operand 59599 states and 99291 transitions. Second operand has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 4 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:53:16,653 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:18,660 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:24,007 INFO L93 Difference]: Finished difference Result 60173 states and 100520 transitions. [2021-11-12 23:53:24,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:53:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 4 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) Word has length 125 [2021-11-12 23:53:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:24,328 INFO L225 Difference]: With dead ends: 60173 [2021-11-12 23:53:24,328 INFO L226 Difference]: Without dead ends: 60158 [2021-11-12 23:53:24,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:53:24,365 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 975 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5204.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.82ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5389.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:24,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 3411 Invalid, 856 Unknown, 0 Unchecked, 8.82ms Time], IncrementalHoareTripleChecker [75 Valid, 779 Invalid, 2 Unknown, 0 Unchecked, 5389.23ms Time] [2021-11-12 23:53:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60158 states. [2021-11-12 23:53:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60158 to 59744. [2021-11-12 23:53:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59744 states, 44518 states have (on average 1.5787995866840379) internal successors, (70285), 47018 states have internal predecessors, (70285), 12329 states have call successors, (12329), 2391 states have call predecessors, (12329), 2896 states have return successors, (16902), 11137 states have call predecessors, (16902), 12324 states have call successors, (16902) [2021-11-12 23:53:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59744 states to 59744 states and 99516 transitions. [2021-11-12 23:53:29,374 INFO L78 Accepts]: Start accepts. Automaton has 59744 states and 99516 transitions. Word has length 125 [2021-11-12 23:53:29,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:29,375 INFO L470 AbstractCegarLoop]: Abstraction has 59744 states and 99516 transitions. [2021-11-12 23:53:29,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 4 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:53:29,375 INFO L276 IsEmpty]: Start isEmpty. Operand 59744 states and 99516 transitions. [2021-11-12 23:53:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:53:29,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:29,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:29,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:29,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:29,604 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:29,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1417255894, now seen corresponding path program 1 times [2021-11-12 23:53:29,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:29,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537251092] [2021-11-12 23:53:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:29,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:29,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:29,609 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:29,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11c2f81e-70a7-4e9e-8731-7b23370dcb30/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:53:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:30,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:53:30,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:53:30,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:53:30,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:30,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537251092] [2021-11-12 23:53:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537251092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:30,813 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:30,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 23:53:30,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314071699] [2021-11-12 23:53:30,813 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:30,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:53:30,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:30,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:53:30,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:53:30,815 INFO L87 Difference]: Start difference. First operand 59744 states and 99516 transitions. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 8 states have internal predecessors, (153), 4 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (23), 6 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 23:53:32,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:37,489 INFO L93 Difference]: Finished difference Result 60973 states and 101399 transitions. [2021-11-12 23:53:37,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:53:37,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 8 states have internal predecessors, (153), 4 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (23), 6 states have call predecessors, (23), 3 states have call successors, (23) Word has length 131 [2021-11-12 23:53:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:38,008 INFO L225 Difference]: With dead ends: 60973 [2021-11-12 23:53:38,009 INFO L226 Difference]: Without dead ends: 60958 [2021-11-12 23:53:38,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:53:38,068 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 955 mSDsluCounter, 3557 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2541.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 4443 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.86ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2648.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:38,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 4443 Invalid, 323 Unknown, 0 Unchecked, 8.86ms Time], IncrementalHoareTripleChecker [48 Valid, 274 Invalid, 1 Unknown, 0 Unchecked, 2648.07ms Time] [2021-11-12 23:53:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60958 states.