./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.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_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/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_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/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_913b565d-c918-4a74-8ad8-5f1c600368b8/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 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:50:22,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:50:22,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:50:22,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:50:22,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:50:22,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:50:22,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:50:22,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:50:22,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:50:22,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:50:22,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:50:22,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:50:22,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:50:22,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:50:22,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:50:22,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:50:22,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:50:22,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:50:22,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:50:22,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:50:22,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:50:22,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:50:22,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:50:22,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:50:22,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:50:22,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:50:22,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:50:22,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:50:22,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:50:22,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:50:22,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:50:22,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:50:22,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:50:22,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:50:22,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:50:22,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:50:22,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:50:22,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:50:22,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:50:22,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:50:22,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:50:22,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:50:22,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:50:22,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:50:22,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:50:22,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:50:22,879 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:50:22,880 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:50:22,880 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:50:22,880 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:50:22,880 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:50:22,881 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:50:22,881 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:50:22,881 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:50:22,882 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:50:22,882 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:50:22,882 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:50:22,883 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:50:22,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:50:22,884 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:50:22,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:50:22,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:50:22,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:50:22,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:50:22,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:50:22,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:50:22,885 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:50:22,886 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:50:22,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:50:22,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:50:22,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:50:22,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:50:22,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:50:22,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:22,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:50:22,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:50:22,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:50:22,889 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:50:22,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:50:22,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:50:22,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:50:22,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:50:22,890 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_913b565d-c918-4a74-8ad8-5f1c600368b8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2021-11-12 22:50:23,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:50:23,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:50:23,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:50:23,193 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:50:23,195 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:50:23,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-12 22:50:23,256 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/data/658a8a149/fc88ff63b47246a7be4d994559dff4c8/FLAG8a917fc9e [2021-11-12 22:50:23,849 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:50:23,849 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-12 22:50:23,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/data/658a8a149/fc88ff63b47246a7be4d994559dff4c8/FLAG8a917fc9e [2021-11-12 22:50:24,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/data/658a8a149/fc88ff63b47246a7be4d994559dff4c8 [2021-11-12 22:50:24,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:50:24,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:50:24,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:24,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:50:24,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:50:24,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:24" (1/1) ... [2021-11-12 22:50:24,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2033eed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:24, skipping insertion in model container [2021-11-12 22:50:24,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:24" (1/1) ... [2021-11-12 22:50:24,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:50:24,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:24,631 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_913b565d-c918-4a74-8ad8-5f1c600368b8/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-12 22:50:24,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:24,654 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:50:24,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f03b7c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:24, skipping insertion in model container [2021-11-12 22:50:24,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:24,655 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:50:24,657 INFO L158 Benchmark]: Toolchain (without parser) took 573.47ms. Allocated memory is still 123.7MB. Free memory was 77.6MB in the beginning and 85.7MB in the end (delta: -8.1MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-11-12 22:50:24,658 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 123.7MB. Free memory is still 96.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:50:24,659 INFO L158 Benchmark]: CACSL2BoogieTranslator took 571.06ms. Allocated memory is still 123.7MB. Free memory was 77.3MB in the beginning and 85.7MB in the end (delta: -8.4MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-11-12 22:50:24,660 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 123.7MB. Free memory is still 96.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 571.06ms. Allocated memory is still 123.7MB. Free memory was 77.3MB in the beginning and 85.7MB in the end (delta: -8.4MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: 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_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/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_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/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_913b565d-c918-4a74-8ad8-5f1c600368b8/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 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:50:26,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:50:26,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:50:26,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:50:26,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:50:26,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:50:26,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:50:26,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:50:26,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:50:26,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:50:26,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:50:26,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:50:26,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:50:26,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:50:26,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:50:26,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:50:26,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:50:26,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:50:26,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:50:26,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:50:26,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:50:26,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:50:26,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:50:26,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:50:26,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:50:26,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:50:26,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:50:26,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:50:26,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:50:26,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:50:26,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:50:26,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:50:26,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:50:26,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:50:26,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:50:26,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:50:26,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:50:26,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:50:26,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:50:26,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:50:26,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:50:26,911 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:50:26,948 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:50:26,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:50:26,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:50:26,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:50:26,950 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:50:26,950 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:50:26,951 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:50:26,951 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:50:26,951 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:50:26,952 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:50:26,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:50:26,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:50:26,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:50:26,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:50:26,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:50:26,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:50:26,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:50:26,955 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:50:26,958 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:50:26,959 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:50:26,959 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:50:26,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:50:26,960 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:50:26,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:50:26,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:50:26,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:50:26,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:50:26,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:26,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:50:26,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:50:26,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:50:26,962 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:50:26,962 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:26,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:50:26,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:50:26,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:50:26,964 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_913b565d-c918-4a74-8ad8-5f1c600368b8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2021-11-12 22:50:27,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:50:27,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:50:27,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:50:27,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:50:27,342 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:50:27,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-12 22:50:27,406 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/data/48b9a64de/ecb2485e81744be0bf11da5971a9c870/FLAGfbb85e18d [2021-11-12 22:50:28,088 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:50:28,088 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-12 22:50:28,113 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/data/48b9a64de/ecb2485e81744be0bf11da5971a9c870/FLAGfbb85e18d [2021-11-12 22:50:28,318 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/data/48b9a64de/ecb2485e81744be0bf11da5971a9c870 [2021-11-12 22:50:28,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:50:28,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:50:28,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:28,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:50:28,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:50:28,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:28" (1/1) ... [2021-11-12 22:50:28,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760d3e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:28, skipping insertion in model container [2021-11-12 22:50:28,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:28" (1/1) ... [2021-11-12 22:50:28,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:50:28,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:28,913 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_913b565d-c918-4a74-8ad8-5f1c600368b8/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-12 22:50:28,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:28,939 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:50:28,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:29,044 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_913b565d-c918-4a74-8ad8-5f1c600368b8/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-12 22:50:29,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:29,056 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:50:29,217 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_913b565d-c918-4a74-8ad8-5f1c600368b8/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-12 22:50:29,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:29,238 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:50:29,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29 WrapperNode [2021-11-12 22:50:29,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:29,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:50:29,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:50:29,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:50:29,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29" (1/1) ... [2021-11-12 22:50:29,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29" (1/1) ... [2021-11-12 22:50:29,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:50:29,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:50:29,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:50:29,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:50:29,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29" (1/1) ... [2021-11-12 22:50:29,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29" (1/1) ... [2021-11-12 22:50:29,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29" (1/1) ... [2021-11-12 22:50:29,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29" (1/1) ... [2021-11-12 22:50:29,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29" (1/1) ... [2021-11-12 22:50:29,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29" (1/1) ... [2021-11-12 22:50:29,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29" (1/1) ... [2021-11-12 22:50:29,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:50:29,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:50:29,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:50:29,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:50:29,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29" (1/1) ... [2021-11-12 22:50:29,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:29,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:29,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:50:29,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:50:29,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:50:29,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:50:29,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:50:29,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:50:29,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:50:29,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:50:29,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:50:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:50:29,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:50:29,844 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 22:50:38,134 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-12 22:50:38,134 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-12 22:50:38,152 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:50:38,153 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:50:38,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:50:38 BoogieIcfgContainer [2021-11-12 22:50:38,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:50:38,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:50:38,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:50:38,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:50:38,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:50:28" (1/3) ... [2021-11-12 22:50:38,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94c7a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:50:38, skipping insertion in model container [2021-11-12 22:50:38,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:29" (2/3) ... [2021-11-12 22:50:38,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94c7a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:50:38, skipping insertion in model container [2021-11-12 22:50:38,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:50:38" (3/3) ... [2021-11-12 22:50:38,164 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.15.i.cil-1.c [2021-11-12 22:50:38,169 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:50:38,169 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:50:38,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:50:38,224 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:50:38,225 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:50:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-12 22:50:38,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:38,258 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] [2021-11-12 22:50:38,259 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:38,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1630857892, now seen corresponding path program 1 times [2021-11-12 22:50:38,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:38,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018142723] [2021-11-12 22:50:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:38,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:38,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:38,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:38,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:50:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:38,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:50:38,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:38,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:50:38,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:50:38,889 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:38,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 22:50:38,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:38,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 22:50:38,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-12 22:50:39,448 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-12 22:50:39,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 1289 treesize of output 1241 [2021-11-12 22:50:39,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:39,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 22:50:39,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:39,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 22:50:39,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-12 22:50:39,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-12 22:50:39,931 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-12 22:50:39,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 22:50:39,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:39,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 22:50:40,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-12 22:50:40,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-12 22:50:40,164 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 22:50:40,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:40,368 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:40,371 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-12 22:50:40,378 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:40,381 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 22:50:40,519 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:40,521 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-12 22:50:40,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:40,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-12 22:50:40,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:40,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-12 22:50:40,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:40,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-12 22:50:40,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:40,596 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-12 22:50:40,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:40,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-12 22:50:41,143 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 22:50:41,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:41,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018142723] [2021-11-12 22:50:41,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018142723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:41,145 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:41,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:50:41,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064657835] [2021-11-12 22:50:41,147 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:41,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:50:41,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:41,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:50:41,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:50:41,196 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:43,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:48,214 INFO L93 Difference]: Finished difference Result 307 states and 519 transitions. [2021-11-12 22:50:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:50:48,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-12 22:50:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:48,228 INFO L225 Difference]: With dead ends: 307 [2021-11-12 22:50:48,228 INFO L226 Difference]: Without dead ends: 140 [2021-11-12 22:50:48,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:50:48,234 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 16 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6732.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.64ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 6928.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:48,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 849 Invalid, 183 Unknown, 0 Unchecked, 7.64ms Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 1 Unknown, 65 Unchecked, 6928.67ms Time] [2021-11-12 22:50:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-12 22:50:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-12 22:50:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.5467625899280575) internal successors, (215), 139 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 215 transitions. [2021-11-12 22:50:48,277 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 215 transitions. Word has length 45 [2021-11-12 22:50:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:48,278 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 215 transitions. [2021-11-12 22:50:48,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 215 transitions. [2021-11-12 22:50:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-12 22:50:48,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:48,281 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] [2021-11-12 22:50:48,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:48,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:48,496 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:48,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1766716126, now seen corresponding path program 1 times [2021-11-12 22:50:48,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:48,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339109370] [2021-11-12 22:50:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:48,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:48,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:48,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:48,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:50:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:48,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:50:48,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:48,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:48,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:48,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:48,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:48,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:50:49,284 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:50:49,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:50:52,542 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:50:52,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:51:00,277 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:51:00,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:51:00,368 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 22:51:00,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:08,679 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 22:51:08,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:08,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339109370] [2021-11-12 22:51:08,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339109370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:08,680 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:08,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-12 22:51:08,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112800272] [2021-11-12 22:51:08,681 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:08,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:51:08,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:51:08,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-12 22:51:08,683 INFO L87 Difference]: Start difference. First operand 140 states and 215 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:10,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:14,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:16,472 INFO L93 Difference]: Finished difference Result 285 states and 441 transitions. [2021-11-12 22:51:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:51:16,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-12 22:51:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:16,476 INFO L225 Difference]: With dead ends: 285 [2021-11-12 22:51:16,477 INFO L226 Difference]: Without dead ends: 155 [2021-11-12 22:51:16,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-12 22:51:16,479 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 15 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7578.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 7767.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:16,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 720 Invalid, 281 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 1 Unknown, 192 Unchecked, 7767.58ms Time] [2021-11-12 22:51:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-12 22:51:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-11-12 22:51:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.56) internal successors, (234), 150 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 234 transitions. [2021-11-12 22:51:16,494 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 234 transitions. Word has length 45 [2021-11-12 22:51:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:16,494 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 234 transitions. [2021-11-12 22:51:16,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 234 transitions. [2021-11-12 22:51:16,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 22:51:16,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:16,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:16,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:51:16,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:16,699 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:16,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:16,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1817968786, now seen corresponding path program 1 times [2021-11-12 22:51:16,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:16,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694888698] [2021-11-12 22:51:16,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:16,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:16,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:16,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:16,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:51:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:17,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:17,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:17,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:17,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:17,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:17,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:17,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:17,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:17,594 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:51:17,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:51:20,765 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:51:20,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:51:28,072 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:51:28,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:51:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:28,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:28,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:28,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694888698] [2021-11-12 22:51:28,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694888698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:28,500 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:28,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:51:28,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410257159] [2021-11-12 22:51:28,500 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:28,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:51:28,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:51:28,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:51:28,502 INFO L87 Difference]: Start difference. First operand 151 states and 234 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:30,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:33,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:33,482 INFO L93 Difference]: Finished difference Result 301 states and 467 transitions. [2021-11-12 22:51:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:51:33,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 22:51:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:33,485 INFO L225 Difference]: With dead ends: 301 [2021-11-12 22:51:33,486 INFO L226 Difference]: Without dead ends: 171 [2021-11-12 22:51:33,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:51:33,489 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 38 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4825.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.76ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 4962.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:33,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 646 Invalid, 248 Unknown, 0 Unchecked, 2.76ms Time], IncrementalHoareTripleChecker [27 Valid, 84 Invalid, 1 Unknown, 136 Unchecked, 4962.68ms Time] [2021-11-12 22:51:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-12 22:51:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2021-11-12 22:51:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5602409638554218) internal successors, (259), 166 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 259 transitions. [2021-11-12 22:51:33,508 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 259 transitions. Word has length 58 [2021-11-12 22:51:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:33,509 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 259 transitions. [2021-11-12 22:51:33,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 259 transitions. [2021-11-12 22:51:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 22:51:33,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:33,512 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] [2021-11-12 22:51:33,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:33,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:33,729 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:33,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:33,730 INFO L85 PathProgramCache]: Analyzing trace with hash 329403111, now seen corresponding path program 1 times [2021-11-12 22:51:33,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:33,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29567358] [2021-11-12 22:51:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:33,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:33,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:33,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:33,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:51:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:34,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:34,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:34,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:34,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:34,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:34,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:34,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:34,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:34,680 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:51:34,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:51:37,939 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:51:37,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:51:44,665 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:51:44,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:51:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:44,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:45,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:45,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29567358] [2021-11-12 22:51:45,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29567358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:45,187 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:45,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:51:45,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642110350] [2021-11-12 22:51:45,188 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:45,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:51:45,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:45,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:51:45,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:51:45,192 INFO L87 Difference]: Start difference. First operand 167 states and 259 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:47,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:50,148 INFO L93 Difference]: Finished difference Result 324 states and 504 transitions. [2021-11-12 22:51:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:51:50,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 22:51:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:50,152 INFO L225 Difference]: With dead ends: 324 [2021-11-12 22:51:50,152 INFO L226 Difference]: Without dead ends: 178 [2021-11-12 22:51:50,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:51:50,153 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 20 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4796.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.24ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 4937.76ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:50,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 726 Invalid, 322 Unknown, 0 Unchecked, 3.24ms Time], IncrementalHoareTripleChecker [28 Valid, 89 Invalid, 1 Unknown, 204 Unchecked, 4937.76ms Time] [2021-11-12 22:51:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-12 22:51:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-12 22:51:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5423728813559323) internal successors, (273), 177 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 273 transitions. [2021-11-12 22:51:50,170 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 273 transitions. Word has length 59 [2021-11-12 22:51:50,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:50,171 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 273 transitions. [2021-11-12 22:51:50,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 273 transitions. [2021-11-12 22:51:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 22:51:50,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:50,173 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:51:50,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-12 22:51:50,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:50,373 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:50,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2078660741, now seen corresponding path program 1 times [2021-11-12 22:51:50,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:50,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450916327] [2021-11-12 22:51:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:50,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:50,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:50,376 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:50,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:51:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:50,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:51:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:50,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:50,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:50,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:50,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:50,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:50,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:51,205 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:51:51,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:51:54,472 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:51:54,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:52:01,326 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:52:01,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:52:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:01,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:01,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:01,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450916327] [2021-11-12 22:52:01,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450916327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:01,833 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:01,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:52:01,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882141387] [2021-11-12 22:52:01,833 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:01,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:52:01,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:52:01,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:52:01,835 INFO L87 Difference]: Start difference. First operand 178 states and 273 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:03,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:07,026 INFO L93 Difference]: Finished difference Result 348 states and 536 transitions. [2021-11-12 22:52:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:52:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 22:52:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:07,030 INFO L225 Difference]: With dead ends: 348 [2021-11-12 22:52:07,030 INFO L226 Difference]: Without dead ends: 191 [2021-11-12 22:52:07,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:52:07,031 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 20 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5006.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.29ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 5173.19ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:07,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 925 Invalid, 329 Unknown, 0 Unchecked, 3.29ms Time], IncrementalHoareTripleChecker [25 Valid, 100 Invalid, 1 Unknown, 203 Unchecked, 5173.19ms Time] [2021-11-12 22:52:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-12 22:52:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-12 22:52:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5263157894736843) internal successors, (290), 190 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 290 transitions. [2021-11-12 22:52:07,045 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 290 transitions. Word has length 59 [2021-11-12 22:52:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:07,045 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 290 transitions. [2021-11-12 22:52:07,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 290 transitions. [2021-11-12 22:52:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 22:52:07,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:07,049 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:07,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:07,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:07,268 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:07,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1364189778, now seen corresponding path program 1 times [2021-11-12 22:52:07,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:07,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313638586] [2021-11-12 22:52:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:07,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:07,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:07,271 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:07,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:52:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:07,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:52:07,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:07,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:07,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:07,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:07,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:07,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:52:08,100 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:52:08,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:52:11,429 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:52:11,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:52:19,046 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:52:19,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:52:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:19,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:19,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:19,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313638586] [2021-11-12 22:52:19,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313638586] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:19,584 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:19,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:52:19,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238963472] [2021-11-12 22:52:19,585 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:19,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:52:19,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:19,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:52:19,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:52:19,587 INFO L87 Difference]: Start difference. First operand 191 states and 290 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:20,457 INFO L93 Difference]: Finished difference Result 363 states and 553 transitions. [2021-11-12 22:52:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:52:20,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 22:52:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:20,460 INFO L225 Difference]: With dead ends: 363 [2021-11-12 22:52:20,460 INFO L226 Difference]: Without dead ends: 193 [2021-11-12 22:52:20,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:52:20,462 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 18 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 845.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.46ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 859.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:20,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 618 Invalid, 105 Unknown, 0 Unchecked, 1.46ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 101 Unchecked, 859.36ms Time] [2021-11-12 22:52:20,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-12 22:52:20,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2021-11-12 22:52:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5210526315789474) internal successors, (289), 190 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2021-11-12 22:52:20,474 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 59 [2021-11-12 22:52:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:20,474 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2021-11-12 22:52:20,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2021-11-12 22:52:20,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 22:52:20,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:20,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:20,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 22:52:20,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:20,695 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:20,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:20,695 INFO L85 PathProgramCache]: Analyzing trace with hash -639030510, now seen corresponding path program 1 times [2021-11-12 22:52:20,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:20,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922941666] [2021-11-12 22:52:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:20,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:20,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:20,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:20,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:52:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:21,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:52:21,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:21,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:21,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:21,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:21,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:21,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:21,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:52:21,702 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:52:21,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:52:24,938 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:52:24,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:52:32,249 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:52:32,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:52:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:32,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:32,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:32,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922941666] [2021-11-12 22:52:32,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922941666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:32,648 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:32,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:52:32,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997081799] [2021-11-12 22:52:32,649 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:32,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:52:32,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:32,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:52:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:52:32,650 INFO L87 Difference]: Start difference. First operand 191 states and 289 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:33,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:34,366 INFO L93 Difference]: Finished difference Result 362 states and 551 transitions. [2021-11-12 22:52:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:52:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 22:52:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:34,369 INFO L225 Difference]: With dead ends: 362 [2021-11-12 22:52:34,369 INFO L226 Difference]: Without dead ends: 192 [2021-11-12 22:52:34,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:52:34,371 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 16 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1680.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1704.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:34,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 823 Invalid, 108 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 101 Unchecked, 1704.37ms Time] [2021-11-12 22:52:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-12 22:52:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-11-12 22:52:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5157894736842106) internal successors, (288), 190 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 288 transitions. [2021-11-12 22:52:34,382 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 288 transitions. Word has length 59 [2021-11-12 22:52:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:34,382 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 288 transitions. [2021-11-12 22:52:34,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 288 transitions. [2021-11-12 22:52:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 22:52:34,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:34,384 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] [2021-11-12 22:52:34,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:34,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:34,605 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash -623672389, now seen corresponding path program 1 times [2021-11-12 22:52:34,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:34,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714472444] [2021-11-12 22:52:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:34,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:34,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:34,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:34,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:52:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:35,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:52:35,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:35,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:35,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:35,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:35,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:35,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:35,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:52:35,438 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:52:35,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:52:38,629 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:52:38,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:52:45,612 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:52:45,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:52:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:45,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:46,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:46,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714472444] [2021-11-12 22:52:46,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714472444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:46,131 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:46,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:52:46,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719249937] [2021-11-12 22:52:46,132 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:46,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:52:46,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:46,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:52:46,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:52:46,133 INFO L87 Difference]: Start difference. First operand 191 states and 288 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:48,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:49,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:51,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:51,369 INFO L93 Difference]: Finished difference Result 373 states and 566 transitions. [2021-11-12 22:52:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:52:51,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-12 22:52:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:51,373 INFO L225 Difference]: With dead ends: 373 [2021-11-12 22:52:51,373 INFO L226 Difference]: Without dead ends: 203 [2021-11-12 22:52:51,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:52:51,374 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 26 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5062.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.30ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 5217.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:51,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 538 Invalid, 150 Unknown, 0 Unchecked, 2.30ms Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 1 Unknown, 36 Unchecked, 5217.64ms Time] [2021-11-12 22:52:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-12 22:52:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 193. [2021-11-12 22:52:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.5052083333333333) internal successors, (289), 192 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 289 transitions. [2021-11-12 22:52:51,385 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 289 transitions. Word has length 60 [2021-11-12 22:52:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:51,385 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 289 transitions. [2021-11-12 22:52:51,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 289 transitions. [2021-11-12 22:52:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 22:52:51,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:51,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:51,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:51,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:51,600 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:51,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1498911040, now seen corresponding path program 1 times [2021-11-12 22:52:51,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:51,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541831688] [2021-11-12 22:52:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:51,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:51,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:51,605 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:51,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:52:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:52,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:52:52,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:52,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:52,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:52,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:52,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:52,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:52,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:52:52,434 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:52:52,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:52:55,609 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:52:55,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:53:02,600 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:53:02,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:53:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:02,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:03,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:03,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541831688] [2021-11-12 22:53:03,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541831688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:03,021 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:03,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:53:03,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060706370] [2021-11-12 22:53:03,022 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:03,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:53:03,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:03,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:53:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:53:03,024 INFO L87 Difference]: Start difference. First operand 193 states and 289 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:05,048 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:07,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:07,509 INFO L93 Difference]: Finished difference Result 367 states and 556 transitions. [2021-11-12 22:53:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:53:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-12 22:53:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:07,514 INFO L225 Difference]: With dead ends: 367 [2021-11-12 22:53:07,514 INFO L226 Difference]: Without dead ends: 195 [2021-11-12 22:53:07,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:53:07,515 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 21 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4330.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.23ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 4470.51ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:07,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 624 Invalid, 242 Unknown, 0 Unchecked, 2.23ms Time], IncrementalHoareTripleChecker [25 Valid, 87 Invalid, 1 Unknown, 129 Unchecked, 4470.51ms Time] [2021-11-12 22:53:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-12 22:53:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-12 22:53:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.4948453608247423) internal successors, (290), 194 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 290 transitions. [2021-11-12 22:53:07,525 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 290 transitions. Word has length 61 [2021-11-12 22:53:07,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:07,525 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 290 transitions. [2021-11-12 22:53:07,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 290 transitions. [2021-11-12 22:53:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 22:53:07,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:07,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:07,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:07,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:07,743 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:07,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:07,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1596742752, now seen corresponding path program 1 times [2021-11-12 22:53:07,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:07,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311904312] [2021-11-12 22:53:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:07,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:07,746 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:07,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:53:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:08,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:08,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:08,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:08,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:08,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:08,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:08,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:08,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:08,780 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 22:53:08,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 22:53:11,999 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 22:53:11,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 22:53:19,078 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 22:53:19,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 22:53:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:19,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:19,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:19,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311904312] [2021-11-12 22:53:19,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311904312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:19,464 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:19,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:53:19,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806327138] [2021-11-12 22:53:19,465 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:19,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:53:19,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:19,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:53:19,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:53:19,466 INFO L87 Difference]: Start difference. First operand 195 states and 290 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:21,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:25,186 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:27,097 INFO L93 Difference]: Finished difference Result 380 states and 570 transitions. [2021-11-12 22:53:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:53:27,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-12 22:53:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:27,105 INFO L225 Difference]: With dead ends: 380 [2021-11-12 22:53:27,105 INFO L226 Difference]: Without dead ends: 206 [2021-11-12 22:53:27,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 22:53:27,106 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 31 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7430.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.99ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 7616.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:27,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 860 Invalid, 297 Unknown, 0 Unchecked, 1.99ms Time], IncrementalHoareTripleChecker [32 Valid, 118 Invalid, 1 Unknown, 146 Unchecked, 7616.11ms Time] [2021-11-12 22:53:27,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-12 22:53:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2021-11-12 22:53:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.4820512820512821) internal successors, (289), 195 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 289 transitions. [2021-11-12 22:53:27,115 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 289 transitions. Word has length 62 [2021-11-12 22:53:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:27,115 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 289 transitions. [2021-11-12 22:53:27,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 289 transitions. [2021-11-12 22:53:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 22:53:27,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:27,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:27,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:27,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:27,320 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2086351112, now seen corresponding path program 1 times [2021-11-12 22:53:27,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:27,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766664671] [2021-11-12 22:53:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:27,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:27,321 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:27,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:53:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:27,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:27,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:27,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:27,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:27,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:27,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:27,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:27,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:28,152 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 22:53:28,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 22:53:29,152 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:53:29,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 22:53:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:29,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:29,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:29,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766664671] [2021-11-12 22:53:29,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766664671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:29,440 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:29,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:53:29,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232676291] [2021-11-12 22:53:29,440 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:29,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:29,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:29,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:29,441 INFO L87 Difference]: Start difference. First operand 196 states and 289 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:31,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:33,479 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:38,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:39,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:44,647 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:48,292 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:51,041 INFO L93 Difference]: Finished difference Result 403 states and 600 transitions. [2021-11-12 22:53:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:53:51,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-12 22:53:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:51,049 INFO L225 Difference]: With dead ends: 403 [2021-11-12 22:53:51,049 INFO L226 Difference]: Without dead ends: 228 [2021-11-12 22:53:51,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:53:51,050 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 21 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21083.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.28ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21522.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:51,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 638 Invalid, 254 Unknown, 0 Unchecked, 2.28ms Time], IncrementalHoareTripleChecker [4 Valid, 248 Invalid, 2 Unknown, 0 Unchecked, 21522.36ms Time] [2021-11-12 22:53:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-12 22:53:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 218. [2021-11-12 22:53:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.4792626728110598) internal successors, (321), 217 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 321 transitions. [2021-11-12 22:53:51,060 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 321 transitions. Word has length 62 [2021-11-12 22:53:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:51,061 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 321 transitions. [2021-11-12 22:53:51,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 321 transitions. [2021-11-12 22:53:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 22:53:51,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:51,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:53:51,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:51,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:51,278 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:51,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1800933116, now seen corresponding path program 1 times [2021-11-12 22:53:51,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:51,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794489398] [2021-11-12 22:53:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:51,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:51,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:51,280 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:51,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:53:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:51,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:51,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:51,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:51,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:51,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:51,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:51,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:51,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:52,194 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 22:53:52,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 22:53:52,959 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:53:52,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 22:53:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:53,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:53:53,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:53,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794489398] [2021-11-12 22:53:53,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794489398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:53,301 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:53,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:53:53,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533250579] [2021-11-12 22:53:53,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:53,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:53:53,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:53:53,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:53:53,302 INFO L87 Difference]: Start difference. First operand 218 states and 321 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:53:55,322 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:59,738 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:02,292 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:07,112 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:08,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:13,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:14,919 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:20,187 INFO L93 Difference]: Finished difference Result 526 states and 789 transitions. [2021-11-12 22:54:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:54:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-12 22:54:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:20,190 INFO L225 Difference]: With dead ends: 526 [2021-11-12 22:54:20,190 INFO L226 Difference]: Without dead ends: 329 [2021-11-12 22:54:20,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:54:20,192 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 188 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 66 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26114.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.02ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26768.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:20,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 636 Invalid, 543 Unknown, 0 Unchecked, 4.02ms Time], IncrementalHoareTripleChecker [66 Valid, 476 Invalid, 1 Unknown, 0 Unchecked, 26768.43ms Time] [2021-11-12 22:54:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-12 22:54:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 221. [2021-11-12 22:54:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.4772727272727273) internal successors, (325), 220 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2021-11-12 22:54:20,203 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 76 [2021-11-12 22:54:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:20,203 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2021-11-12 22:54:20,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2021-11-12 22:54:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 22:54:20,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:20,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:20,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-12 22:54:20,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:20,421 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:20,421 INFO L85 PathProgramCache]: Analyzing trace with hash -202287172, now seen corresponding path program 1 times [2021-11-12 22:54:20,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:20,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849231997] [2021-11-12 22:54:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:20,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:20,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:20,423 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:20,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:54:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:20,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:20,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:20,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:20,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:20,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:20,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:21,336 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 22:54:21,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 22:54:22,061 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:54:22,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 22:54:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:22,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:22,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:22,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849231997] [2021-11-12 22:54:22,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849231997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:22,421 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:22,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:54:22,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300497933] [2021-11-12 22:54:22,422 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:22,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:54:22,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:54:22,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:22,424 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:24,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:26,474 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:31,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:34,999 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:36,967 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:38,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:40,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:43,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:44,486 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:47,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:49,556 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:52,301 INFO L93 Difference]: Finished difference Result 545 states and 813 transitions. [2021-11-12 22:54:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:54:52,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-12 22:54:52,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:52,305 INFO L225 Difference]: With dead ends: 545 [2021-11-12 22:54:52,305 INFO L226 Difference]: Without dead ends: 345 [2021-11-12 22:54:52,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:54:52,307 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 168 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 59 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29119.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.55ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29742.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:52,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 521 Invalid, 444 Unknown, 0 Unchecked, 3.55ms Time], IncrementalHoareTripleChecker [59 Valid, 381 Invalid, 4 Unknown, 0 Unchecked, 29742.96ms Time] [2021-11-12 22:54:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-12 22:54:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 238. [2021-11-12 22:54:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.459915611814346) internal successors, (346), 237 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 346 transitions. [2021-11-12 22:54:52,318 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 346 transitions. Word has length 76 [2021-11-12 22:54:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:52,319 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 346 transitions. [2021-11-12 22:54:52,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 346 transitions. [2021-11-12 22:54:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:54:52,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:52,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:52,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:52,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:52,528 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:52,528 INFO L85 PathProgramCache]: Analyzing trace with hash -563287765, now seen corresponding path program 1 times [2021-11-12 22:54:52,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:52,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242500966] [2021-11-12 22:54:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:52,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:52,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:52,530 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:52,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:54:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:54:53,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:53,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:53,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:53,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:53,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:53,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:53,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:53,229 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:54:53,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:54:53,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:53,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:53,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:53,644 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:54:53,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:54:55,728 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:54:55,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:54:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:54:55,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:54:56,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:56,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242500966] [2021-11-12 22:54:56,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242500966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:56,137 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:56,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:54:56,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781786208] [2021-11-12 22:54:56,138 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:56,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:54:56,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:54:56,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:56,140 INFO L87 Difference]: Start difference. First operand 238 states and 346 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:58,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:00,911 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:04,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:08,503 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:10,653 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:12,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:18,042 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:26,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:26,792 INFO L93 Difference]: Finished difference Result 684 states and 1013 transitions. [2021-11-12 22:55:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:26,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-12 22:55:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:26,797 INFO L225 Difference]: With dead ends: 684 [2021-11-12 22:55:26,797 INFO L226 Difference]: Without dead ends: 467 [2021-11-12 22:55:26,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:55:26,799 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 387 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 90 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29756.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.44ms SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30526.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:26,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 684 Invalid, 611 Unknown, 0 Unchecked, 5.44ms Time], IncrementalHoareTripleChecker [90 Valid, 518 Invalid, 3 Unknown, 0 Unchecked, 30526.08ms Time] [2021-11-12 22:55:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-11-12 22:55:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 292. [2021-11-12 22:55:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.4879725085910653) internal successors, (433), 291 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 433 transitions. [2021-11-12 22:55:26,816 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 433 transitions. Word has length 84 [2021-11-12 22:55:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:26,817 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 433 transitions. [2021-11-12 22:55:26,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 433 transitions. [2021-11-12 22:55:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 22:55:26,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:26,819 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:26,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 22:55:27,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:27,036 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:27,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2033323436, now seen corresponding path program 1 times [2021-11-12 22:55:27,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:27,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739838400] [2021-11-12 22:55:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:27,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:27,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:27,038 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:27,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:55:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:27,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:55:27,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:27,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:27,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:27,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:27,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:27,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:27,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:27,765 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:55:27,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:55:27,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:27,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:27,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:28,148 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:55:28,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:55:30,401 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:55:30,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:55:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:55:30,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:55:30,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:30,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739838400] [2021-11-12 22:55:30,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739838400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:30,928 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:30,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:55:30,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323478866] [2021-11-12 22:55:30,929 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:30,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:55:30,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:55:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:55:30,930 INFO L87 Difference]: Start difference. First operand 292 states and 433 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:32,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:43,887 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:46,666 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:48,251 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:49,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:50,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:53,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:57,407 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:00,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:00,430 INFO L93 Difference]: Finished difference Result 772 states and 1170 transitions. [2021-11-12 22:56:00,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:56:00,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-12 22:56:00,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:00,436 INFO L225 Difference]: With dead ends: 772 [2021-11-12 22:56:00,437 INFO L226 Difference]: Without dead ends: 501 [2021-11-12 22:56:00,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:00,438 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 353 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 81 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28701.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.79ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29365.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:00,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 551 Invalid, 484 Unknown, 0 Unchecked, 3.79ms Time], IncrementalHoareTripleChecker [81 Valid, 401 Invalid, 2 Unknown, 0 Unchecked, 29365.69ms Time] [2021-11-12 22:56:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-12 22:56:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 336. [2021-11-12 22:56:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.5462686567164179) internal successors, (518), 335 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 518 transitions. [2021-11-12 22:56:00,454 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 518 transitions. Word has length 85 [2021-11-12 22:56:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:00,454 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 518 transitions. [2021-11-12 22:56:00,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 518 transitions. [2021-11-12 22:56:00,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 22:56:00,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:00,457 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:00,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:00,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:00,672 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1665671371, now seen corresponding path program 1 times [2021-11-12 22:56:00,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:00,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469312169] [2021-11-12 22:56:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:00,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:00,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:00,674 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:00,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:56:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:01,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:01,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:01,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:01,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:01,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:01,301 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:56:01,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:56:01,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:01,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:01,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:01,658 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:56:01,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:56:03,223 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:56:03,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:56:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:56:03,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:56:03,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:03,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469312169] [2021-11-12 22:56:03,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469312169] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:03,894 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:03,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:56:03,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717180910] [2021-11-12 22:56:03,894 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:03,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:56:03,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:56:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:56:03,896 INFO L87 Difference]: Start difference. First operand 336 states and 518 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:05,924 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:08,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:17,076 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:19,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:20,397 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:25,010 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:27,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:30,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:30,238 INFO L93 Difference]: Finished difference Result 856 states and 1318 transitions. [2021-11-12 22:56:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:56:30,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-12 22:56:30,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:30,243 INFO L225 Difference]: With dead ends: 856 [2021-11-12 22:56:30,243 INFO L226 Difference]: Without dead ends: 541 [2021-11-12 22:56:30,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:30,244 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 379 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25554.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.77ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26209.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:30,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 550 Invalid, 475 Unknown, 0 Unchecked, 3.77ms Time], IncrementalHoareTripleChecker [72 Valid, 401 Invalid, 2 Unknown, 0 Unchecked, 26209.92ms Time] [2021-11-12 22:56:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-12 22:56:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 366. [2021-11-12 22:56:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.5424657534246575) internal successors, (563), 365 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:30,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 563 transitions. [2021-11-12 22:56:30,260 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 563 transitions. Word has length 112 [2021-11-12 22:56:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:30,260 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 563 transitions. [2021-11-12 22:56:30,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:30,261 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 563 transitions. [2021-11-12 22:56:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:56:30,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:30,263 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:30,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-12 22:56:30,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:30,479 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash -726605541, now seen corresponding path program 1 times [2021-11-12 22:56:30,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:30,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412770349] [2021-11-12 22:56:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:30,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:30,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:30,482 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:30,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:56:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:31,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:31,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:31,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:31,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:31,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:31,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:31,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:31,215 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:56:31,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:56:31,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:31,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:31,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:31,566 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:56:31,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:56:33,191 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:56:33,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:56:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:56:33,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:56:33,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:33,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412770349] [2021-11-12 22:56:33,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412770349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:33,768 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:33,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:56:33,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676182186] [2021-11-12 22:56:33,769 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:33,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:56:33,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:56:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:56:33,771 INFO L87 Difference]: Start difference. First operand 366 states and 563 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:56:35,803 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:37,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:42,057 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:51,720 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:56,856 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:59,629 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:02,489 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:03,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:05,056 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:06,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:11,587 INFO L93 Difference]: Finished difference Result 875 states and 1342 transitions. [2021-11-12 22:57:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:57:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-12 22:57:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:11,591 INFO L225 Difference]: With dead ends: 875 [2021-11-12 22:57:11,591 INFO L226 Difference]: Without dead ends: 530 [2021-11-12 22:57:11,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:11,593 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 233 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 74 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36847.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.13ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37677.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:11,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 692 Invalid, 590 Unknown, 0 Unchecked, 4.13ms Time], IncrementalHoareTripleChecker [74 Valid, 513 Invalid, 3 Unknown, 0 Unchecked, 37677.97ms Time] [2021-11-12 22:57:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-12 22:57:11,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 366. [2021-11-12 22:57:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.5342465753424657) internal successors, (560), 365 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:57:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 560 transitions. [2021-11-12 22:57:11,608 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 560 transitions. Word has length 113 [2021-11-12 22:57:11,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:11,608 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 560 transitions. [2021-11-12 22:57:11,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:57:11,609 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 560 transitions. [2021-11-12 22:57:11,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:57:11,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:11,611 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:11,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-12 22:57:11,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:11,847 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:11,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:11,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1821991616, now seen corresponding path program 1 times [2021-11-12 22:57:11,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:11,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585493111] [2021-11-12 22:57:11,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:11,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:11,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:11,849 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:11,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:57:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:12,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:57:12,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:12,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:12,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:12,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:12,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:12,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:12,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:12,464 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:57:12,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:57:12,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:12,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:12,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:12,808 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:57:12,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:57:14,359 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:57:14,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:57:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:57:14,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:57:14,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:14,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585493111] [2021-11-12 22:57:14,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585493111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:14,941 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:14,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:57:14,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839623934] [2021-11-12 22:57:14,942 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:14,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:57:14,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:14,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:57:14,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:57:14,943 INFO L87 Difference]: Start difference. First operand 366 states and 560 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:57:16,978 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:18,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:21,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:24,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:26,350 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:36,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:41,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:42,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:46,847 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:51,506 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:51,920 INFO L93 Difference]: Finished difference Result 911 states and 1400 transitions. [2021-11-12 22:57:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:57:51,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-12 22:57:51,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:51,923 INFO L225 Difference]: With dead ends: 911 [2021-11-12 22:57:51,923 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 22:57:51,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:51,925 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 199 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 50 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36012.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.94ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36846.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:51,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 820 Invalid, 628 Unknown, 0 Unchecked, 3.94ms Time], IncrementalHoareTripleChecker [50 Valid, 574 Invalid, 4 Unknown, 0 Unchecked, 36846.40ms Time] [2021-11-12 22:57:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 22:57:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 416. [2021-11-12 22:57:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.5349397590361447) internal successors, (637), 415 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:57:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 637 transitions. [2021-11-12 22:57:51,942 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 637 transitions. Word has length 113 [2021-11-12 22:57:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:51,942 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 637 transitions. [2021-11-12 22:57:51,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:57:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 637 transitions. [2021-11-12 22:57:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:57:51,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:51,944 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:51,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-12 22:57:52,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:52,161 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:52,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:52,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1964206957, now seen corresponding path program 1 times [2021-11-12 22:57:52,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:52,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685725060] [2021-11-12 22:57:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:52,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:52,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:52,163 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:52,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:57:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:52,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:57:52,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:52,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:52,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:52,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:52,835 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:57:52,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:57:52,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:52,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:52,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:53,182 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:57:53,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:57:55,007 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:57:55,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:57:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:57:55,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:57:55,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:55,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685725060] [2021-11-12 22:57:55,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685725060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:55,528 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:55,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:57:55,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62786865] [2021-11-12 22:57:55,529 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:55,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:57:55,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:55,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:57:55,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:57:55,530 INFO L87 Difference]: Start difference. First operand 416 states and 637 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:57:57,551 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:12,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:17,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:19,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:23,735 INFO L93 Difference]: Finished difference Result 1012 states and 1546 transitions. [2021-11-12 22:58:23,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:58:23,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-12 22:58:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:23,739 INFO L225 Difference]: With dead ends: 1012 [2021-11-12 22:58:23,739 INFO L226 Difference]: Without dead ends: 617 [2021-11-12 22:58:23,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:58:23,740 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 344 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27389.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.81ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28089.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:23,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 628 Invalid, 597 Unknown, 0 Unchecked, 3.81ms Time], IncrementalHoareTripleChecker [80 Valid, 516 Invalid, 1 Unknown, 0 Unchecked, 28089.46ms Time] [2021-11-12 22:58:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-12 22:58:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 453. [2021-11-12 22:58:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.5309734513274336) internal successors, (692), 452 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 692 transitions. [2021-11-12 22:58:23,755 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 692 transitions. Word has length 118 [2021-11-12 22:58:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:23,756 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 692 transitions. [2021-11-12 22:58:23,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 692 transitions. [2021-11-12 22:58:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:58:23,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:23,758 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:23,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-12 22:58:23,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:23,971 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash -99507122, now seen corresponding path program 1 times [2021-11-12 22:58:23,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:23,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973083653] [2021-11-12 22:58:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:23,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:23,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:23,973 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:23,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:58:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:24,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:58:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:24,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:24,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:24,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:24,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:24,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:24,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:24,583 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:58:24,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:58:24,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:24,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:24,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:24,922 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:58:24,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:58:26,809 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:58:26,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:58:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:58:26,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:58:27,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:27,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973083653] [2021-11-12 22:58:27,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973083653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:27,342 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:27,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:58:27,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244254253] [2021-11-12 22:58:27,342 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:27,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:58:27,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:27,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:58:27,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:58:27,343 INFO L87 Difference]: Start difference. First operand 453 states and 692 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:29,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:41,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:43,482 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:52,651 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:54,148 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:55,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:55,667 INFO L93 Difference]: Finished difference Result 1044 states and 1591 transitions. [2021-11-12 22:58:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:58:55,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-12 22:58:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:55,670 INFO L225 Difference]: With dead ends: 1044 [2021-11-12 22:58:55,671 INFO L226 Difference]: Without dead ends: 612 [2021-11-12 22:58:55,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:58:55,672 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 287 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 79 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27508.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.68ms SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28201.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:55,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 642 Invalid, 601 Unknown, 0 Unchecked, 3.68ms Time], IncrementalHoareTripleChecker [79 Valid, 521 Invalid, 1 Unknown, 0 Unchecked, 28201.01ms Time] [2021-11-12 22:58:55,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-12 22:58:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 453. [2021-11-12 22:58:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.5243362831858407) internal successors, (689), 452 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 689 transitions. [2021-11-12 22:58:55,690 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 689 transitions. Word has length 119 [2021-11-12 22:58:55,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:55,691 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 689 transitions. [2021-11-12 22:58:55,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 689 transitions. [2021-11-12 22:58:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:58:55,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:55,693 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:55,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:55,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:55,910 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:55,910 INFO L85 PathProgramCache]: Analyzing trace with hash 28083966, now seen corresponding path program 1 times [2021-11-12 22:58:55,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:55,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609154483] [2021-11-12 22:58:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:55,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:55,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:55,912 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:55,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:58:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:58:56,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:58:56,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:58:56,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:56,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609154483] [2021-11-12 22:58:56,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609154483] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:56,856 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:56,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:58:56,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284437447] [2021-11-12 22:58:56,856 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:56,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:58:56,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:58:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:58:56,858 INFO L87 Difference]: Start difference. First operand 453 states and 689 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:57,354 INFO L93 Difference]: Finished difference Result 1685 states and 2583 transitions. [2021-11-12 22:58:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:58:57,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-12 22:58:57,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:57,360 INFO L225 Difference]: With dead ends: 1685 [2021-11-12 22:58:57,360 INFO L226 Difference]: Without dead ends: 1253 [2021-11-12 22:58:57,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:58:57,362 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 384 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 448.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 469.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:57,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 605 Invalid, 94 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [29 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 469.02ms Time] [2021-11-12 22:58:57,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-11-12 22:58:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1245. [2021-11-12 22:58:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 1.5257234726688103) internal successors, (1898), 1244 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1898 transitions. [2021-11-12 22:58:57,417 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1898 transitions. Word has length 127 [2021-11-12 22:58:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:57,417 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 1898 transitions. [2021-11-12 22:58:57,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1898 transitions. [2021-11-12 22:58:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:58:57,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:57,421 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:57,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:57,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:57,635 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash 841592010, now seen corresponding path program 1 times [2021-11-12 22:58:57,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:57,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061377482] [2021-11-12 22:58:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:57,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:57,637 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:57,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:58:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:57,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:58:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:58:58,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:58:58,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:58,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061377482] [2021-11-12 22:58:58,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061377482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:58,442 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:58,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:58:58,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653903422] [2021-11-12 22:58:58,443 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:58,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:58:58,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:58,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:58:58,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:58:58,444 INFO L87 Difference]: Start difference. First operand 1245 states and 1898 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:59,306 INFO L93 Difference]: Finished difference Result 2496 states and 3809 transitions. [2021-11-12 22:58:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:58:59,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-12 22:58:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:59,314 INFO L225 Difference]: With dead ends: 2496 [2021-11-12 22:58:59,315 INFO L226 Difference]: Without dead ends: 1272 [2021-11-12 22:58:59,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:58:59,317 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 15 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 811.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 830.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:59,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 414 Invalid, 29 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 830.91ms Time] [2021-11-12 22:58:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-11-12 22:58:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1272. [2021-11-12 22:58:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 1.5208497246262784) internal successors, (1933), 1271 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1933 transitions. [2021-11-12 22:58:59,371 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1933 transitions. Word has length 128 [2021-11-12 22:58:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:59,372 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1933 transitions. [2021-11-12 22:58:59,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1933 transitions. [2021-11-12 22:58:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:58:59,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:59,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:59,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:59,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:59,589 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:59,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1300268468, now seen corresponding path program 1 times [2021-11-12 22:58:59,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:59,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945561343] [2021-11-12 22:58:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:59,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:59,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:59,593 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:59,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:58:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:59,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:58:59,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 22:59:00,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 22:59:00,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:00,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945561343] [2021-11-12 22:59:00,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945561343] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:00,592 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:00,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:59:00,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413829655] [2021-11-12 22:59:00,593 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:00,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:59:00,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:00,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:59:00,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:59:00,594 INFO L87 Difference]: Start difference. First operand 1272 states and 1933 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:00,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:00,667 INFO L93 Difference]: Finished difference Result 2525 states and 3845 transitions. [2021-11-12 22:59:00,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:59:00,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-12 22:59:00,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:00,674 INFO L225 Difference]: With dead ends: 2525 [2021-11-12 22:59:00,674 INFO L226 Difference]: Without dead ends: 1274 [2021-11-12 22:59:00,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:59:00,676 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 4 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:00,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 393 Invalid, 27 Unknown, 0 Unchecked, 0.40ms Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 44.89ms Time] [2021-11-12 22:59:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-11-12 22:59:00,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1274. [2021-11-12 22:59:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 1.5200314218381776) internal successors, (1935), 1273 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1935 transitions. [2021-11-12 22:59:00,740 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1935 transitions. Word has length 128 [2021-11-12 22:59:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:00,740 INFO L470 AbstractCegarLoop]: Abstraction has 1274 states and 1935 transitions. [2021-11-12 22:59:00,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1935 transitions. [2021-11-12 22:59:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 22:59:00,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:00,743 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:00,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:00,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:00,951 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:00,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:00,951 INFO L85 PathProgramCache]: Analyzing trace with hash 821528815, now seen corresponding path program 1 times [2021-11-12 22:59:00,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:00,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24858878] [2021-11-12 22:59:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:00,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:00,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:00,953 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:00,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:59:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:59:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:01,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:01,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:01,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:01,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:01,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:01,747 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:59:01,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:59:01,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:01,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:01,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:02,094 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:59:02,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:59:04,147 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:59:04,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:59:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:59:04,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:59:05,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:05,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24858878] [2021-11-12 22:59:05,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24858878] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:05,311 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:05,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 22:59:05,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899085402] [2021-11-12 22:59:05,312 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:05,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:59:05,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:59:05,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:59:05,312 INFO L87 Difference]: Start difference. First operand 1274 states and 1935 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:07,331 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:08,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:16,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:18,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:18,608 INFO L93 Difference]: Finished difference Result 2740 states and 4153 transitions. [2021-11-12 22:59:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:59:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-12 22:59:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:18,618 INFO L225 Difference]: With dead ends: 2740 [2021-11-12 22:59:18,618 INFO L226 Difference]: Without dead ends: 1489 [2021-11-12 22:59:18,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:59:18,620 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 98 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12850.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13202.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:18,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 501 Invalid, 238 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [10 Valid, 227 Invalid, 1 Unknown, 0 Unchecked, 13202.08ms Time] [2021-11-12 22:59:18,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-11-12 22:59:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1401. [2021-11-12 22:59:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 1.5157142857142858) internal successors, (2122), 1400 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 2122 transitions. [2021-11-12 22:59:18,685 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 2122 transitions. Word has length 130 [2021-11-12 22:59:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:18,686 INFO L470 AbstractCegarLoop]: Abstraction has 1401 states and 2122 transitions. [2021-11-12 22:59:18,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 2122 transitions. [2021-11-12 22:59:18,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 22:59:18,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:18,688 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:18,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:18,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:18,905 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:18,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:18,905 INFO L85 PathProgramCache]: Analyzing trace with hash 235252593, now seen corresponding path program 1 times [2021-11-12 22:59:18,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:18,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036627619] [2021-11-12 22:59:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:18,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:18,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:18,907 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:18,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:59:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:19,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:59:19,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:19,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:19,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:19,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:19,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:19,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:19,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:19,620 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 22:59:19,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-12 22:59:19,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:19,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:19,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:19,963 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:59:19,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-12 22:59:21,077 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:59:21,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-12 22:59:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:59:21,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:59:21,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:21,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036627619] [2021-11-12 22:59:21,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036627619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:21,952 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:21,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 22:59:21,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204200249] [2021-11-12 22:59:21,953 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:21,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:59:21,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:59:21,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:59:21,953 INFO L87 Difference]: Start difference. First operand 1401 states and 2122 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:23,978 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:25,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:34,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:35,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:39,695 INFO L93 Difference]: Finished difference Result 2888 states and 4370 transitions. [2021-11-12 22:59:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:59:39,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-12 22:59:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:39,702 INFO L225 Difference]: With dead ends: 2888 [2021-11-12 22:59:39,703 INFO L226 Difference]: Without dead ends: 1510 [2021-11-12 22:59:39,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:59:39,704 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 25 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17218.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17646.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:39,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 702 Invalid, 268 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 17646.11ms Time] [2021-11-12 22:59:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2021-11-12 22:59:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1473. [2021-11-12 22:59:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 1.5108695652173914) internal successors, (2224), 1472 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2224 transitions. [2021-11-12 22:59:39,770 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2224 transitions. Word has length 130 [2021-11-12 22:59:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:39,770 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 2224 transitions. [2021-11-12 22:59:39,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2224 transitions. [2021-11-12 22:59:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 22:59:39,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:39,773 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:59:39,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:39,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:39,990 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash 840142354, now seen corresponding path program 1 times [2021-11-12 22:59:39,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:39,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281334149] [2021-11-12 22:59:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:39,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:39,992 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:39,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:59:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:40,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:59:40,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:40,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:40,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:40,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:40,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:40,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:40,642 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:59:40,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 22:59:40,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:40,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:40,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:40,972 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:59:40,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:59:42,287 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:59:42,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 22:59:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 22:59:42,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 22:59:42,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:42,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281334149] [2021-11-12 22:59:42,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281334149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:42,937 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:42,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:59:42,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156347679] [2021-11-12 22:59:42,937 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:42,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:59:42,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:42,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:59:42,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:42,939 INFO L87 Difference]: Start difference. First operand 1473 states and 2224 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:44,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:46,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:00,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:06,020 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 23:00:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:08,311 INFO L93 Difference]: Finished difference Result 3436 states and 5157 transitions. [2021-11-12 23:00:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:00:08,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-12 23:00:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:08,319 INFO L225 Difference]: With dead ends: 3436 [2021-11-12 23:00:08,320 INFO L226 Difference]: Without dead ends: 1986 [2021-11-12 23:00:08,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:00:08,326 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 274 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24645.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.08ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25226.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:08,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 548 Invalid, 484 Unknown, 0 Unchecked, 3.08ms Time], IncrementalHoareTripleChecker [72 Valid, 409 Invalid, 3 Unknown, 0 Unchecked, 25226.55ms Time] [2021-11-12 23:00:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-11-12 23:00:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1641. [2021-11-12 23:00:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 1.4993902439024391) internal successors, (2459), 1640 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2459 transitions. [2021-11-12 23:00:08,393 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2459 transitions. Word has length 137 [2021-11-12 23:00:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:08,393 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2459 transitions. [2021-11-12 23:00:08,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2459 transitions. [2021-11-12 23:00:08,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-12 23:00:08,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:08,396 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:00:08,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:08,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:08,616 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1913692044, now seen corresponding path program 1 times [2021-11-12 23:00:08,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:08,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408039331] [2021-11-12 23:00:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:08,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:08,620 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:08,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:00:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:09,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:00:09,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:09,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:09,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:09,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:09,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:09,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:09,310 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:00:09,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:00:09,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:09,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:09,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:09,639 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:00:09,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:00:11,008 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:00:11,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:00:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:00:11,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:00:11,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:11,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408039331] [2021-11-12 23:00:11,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408039331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:11,598 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:11,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:00:11,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011682728] [2021-11-12 23:00:11,598 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:11,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:00:11,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:11,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:00:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:00:11,600 INFO L87 Difference]: Start difference. First operand 1641 states and 2459 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:13,626 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 23:00:15,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:28,550 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:30,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:34,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:35,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:39,897 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:41,926 INFO L93 Difference]: Finished difference Result 3532 states and 5261 transitions. [2021-11-12 23:00:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:00:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-12 23:00:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:41,933 INFO L225 Difference]: With dead ends: 3532 [2021-11-12 23:00:41,934 INFO L226 Difference]: Without dead ends: 1914 [2021-11-12 23:00:41,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:00:41,935 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 202 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29474.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30169.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:41,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 601 Invalid, 572 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [72 Valid, 498 Invalid, 2 Unknown, 0 Unchecked, 30169.22ms Time] [2021-11-12 23:00:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-11-12 23:00:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1641. [2021-11-12 23:00:41,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 1.4853658536585366) internal successors, (2436), 1640 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2436 transitions. [2021-11-12 23:00:41,999 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2436 transitions. Word has length 138 [2021-11-12 23:00:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:41,999 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2436 transitions. [2021-11-12 23:00:42,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2436 transitions. [2021-11-12 23:00:42,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:00:42,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:42,003 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:00:42,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-12 23:00:42,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:42,216 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:42,216 INFO L85 PathProgramCache]: Analyzing trace with hash -967520492, now seen corresponding path program 1 times [2021-11-12 23:00:42,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:42,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364156433] [2021-11-12 23:00:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:42,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:42,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:42,218 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:42,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:00:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:42,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:00:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:42,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:42,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:42,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:42,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:42,947 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:00:42,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:00:43,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:43,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:43,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:43,303 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:00:43,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:00:45,037 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:00:45,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:00:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:00:45,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:00:45,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:45,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364156433] [2021-11-12 23:00:45,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364156433] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:45,700 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:45,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:00:45,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664004958] [2021-11-12 23:00:45,701 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:45,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:00:45,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:45,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:00:45,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:00:45,701 INFO L87 Difference]: Start difference. First operand 1641 states and 2436 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:47,732 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:49,742 WARN L515 Checker$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 23:00:51,750 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:08,332 WARN L515 Checker$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 23:01:09,653 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:14,733 WARN L515 Checker$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 23:01:20,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:20,424 INFO L93 Difference]: Finished difference Result 3652 states and 5389 transitions. [2021-11-12 23:01:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:01:20,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-12 23:01:20,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:20,433 INFO L225 Difference]: With dead ends: 3652 [2021-11-12 23:01:20,433 INFO L226 Difference]: Without dead ends: 2034 [2021-11-12 23:01:20,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:01:20,436 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 194 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 67 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33850.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.33ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34565.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:20,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 618 Invalid, 574 Unknown, 0 Unchecked, 3.33ms Time], IncrementalHoareTripleChecker [67 Valid, 502 Invalid, 5 Unknown, 0 Unchecked, 34565.12ms Time] [2021-11-12 23:01:20,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-11-12 23:01:20,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1746. [2021-11-12 23:01:20,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 1.4767908309455586) internal successors, (2577), 1745 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2577 transitions. [2021-11-12 23:01:20,488 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2577 transitions. Word has length 150 [2021-11-12 23:01:20,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:20,489 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 2577 transitions. [2021-11-12 23:01:20,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2577 transitions. [2021-11-12 23:01:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:01:20,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:20,491 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:01:20,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:20,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:20,709 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:20,709 INFO L85 PathProgramCache]: Analyzing trace with hash 410226837, now seen corresponding path program 1 times [2021-11-12 23:01:20,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:20,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121683179] [2021-11-12 23:01:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:20,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:20,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:20,711 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:20,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:01:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:21,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:01:21,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:21,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:21,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:21,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:21,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:21,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:21,446 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:01:21,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:01:21,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:21,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:21,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:21,798 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:01:21,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:01:23,562 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:01:23,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:01:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:01:23,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:01:24,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:24,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121683179] [2021-11-12 23:01:24,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121683179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:01:24,287 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:24,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:01:24,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662656288] [2021-11-12 23:01:24,288 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:24,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:01:24,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:01:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:01:24,289 INFO L87 Difference]: Start difference. First operand 1746 states and 2577 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:26,324 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:29,560 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:37,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:39,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:47,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:49,067 WARN L515 Checker$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 23:01:50,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:51,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:51,203 INFO L93 Difference]: Finished difference Result 3736 states and 5491 transitions. [2021-11-12 23:01:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:01:51,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-12 23:01:51,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:51,211 INFO L225 Difference]: With dead ends: 3736 [2021-11-12 23:01:51,211 INFO L226 Difference]: Without dead ends: 2013 [2021-11-12 23:01:51,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:01:51,213 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 253 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 76 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26092.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.41ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26745.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:51,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 625 Invalid, 592 Unknown, 0 Unchecked, 3.41ms Time], IncrementalHoareTripleChecker [76 Valid, 514 Invalid, 2 Unknown, 0 Unchecked, 26745.61ms Time] [2021-11-12 23:01:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2021-11-12 23:01:51,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1746. [2021-11-12 23:01:51,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 1.4681948424068767) internal successors, (2562), 1745 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2562 transitions. [2021-11-12 23:01:51,294 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2562 transitions. Word has length 151 [2021-11-12 23:01:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:51,294 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 2562 transitions. [2021-11-12 23:01:51,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2562 transitions. [2021-11-12 23:01:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 23:01:51,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:51,296 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:51,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:51,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:51,497 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash -650934266, now seen corresponding path program 1 times [2021-11-12 23:01:51,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:51,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561733191] [2021-11-12 23:01:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:51,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:51,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:51,499 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:51,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:01:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:01:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:52,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:52,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:52,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:52,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:52,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:52,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:52,205 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:01:52,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:01:52,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:52,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:52,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:52,545 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:01:52,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:01:53,605 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:01:53,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:01:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:01:53,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:01:54,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:54,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561733191] [2021-11-12 23:01:54,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561733191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:01:54,257 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:54,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:01:54,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87931985] [2021-11-12 23:01:54,258 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:54,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:01:54,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:01:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:01:54,259 INFO L87 Difference]: Start difference. First operand 1746 states and 2562 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:56,302 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 23:01:58,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:00,324 WARN L515 Checker$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 23:02:02,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:10,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:14,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:16,354 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:17,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:19,093 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:26,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:28,800 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:29,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:30,674 INFO L93 Difference]: Finished difference Result 3736 states and 5461 transitions. [2021-11-12 23:02:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:02:30,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-12 23:02:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:30,682 INFO L225 Difference]: With dead ends: 3736 [2021-11-12 23:02:30,682 INFO L226 Difference]: Without dead ends: 2013 [2021-11-12 23:02:30,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:02:30,684 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 201 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 65 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35427.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.76ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36249.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:30,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 779 Invalid, 700 Unknown, 0 Unchecked, 3.76ms Time], IncrementalHoareTripleChecker [65 Valid, 632 Invalid, 3 Unknown, 0 Unchecked, 36249.98ms Time] [2021-11-12 23:02:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2021-11-12 23:02:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1746. [2021-11-12 23:02:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 1.4498567335243553) internal successors, (2530), 1745 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:30,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2530 transitions. [2021-11-12 23:02:30,740 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2530 transitions. Word has length 152 [2021-11-12 23:02:30,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:30,740 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 2530 transitions. [2021-11-12 23:02:30,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2530 transitions. [2021-11-12 23:02:30,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 23:02:30,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:30,742 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:02:30,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:30,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:02:30,943 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1689518840, now seen corresponding path program 1 times [2021-11-12 23:02:30,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:30,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254442954] [2021-11-12 23:02:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:30,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:30,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:30,945 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:30,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:02:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:31,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:02:31,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:31,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:31,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:31,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:31,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:31,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:31,915 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:02:31,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 23:02:33,145 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:02:33,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 23:02:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:02:33,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:02:33,672 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:33,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254442954] [2021-11-12 23:02:33,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254442954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:02:33,672 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:02:33,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:02:33,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890618981] [2021-11-12 23:02:33,672 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:02:33,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:02:33,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:33,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:02:33,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:02:33,673 INFO L87 Difference]: Start difference. First operand 1746 states and 2530 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:35,694 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 23:02:41,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:44,617 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:44,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:44,729 INFO L93 Difference]: Finished difference Result 3587 states and 5201 transitions. [2021-11-12 23:02:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:02:44,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-12 23:02:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:44,740 INFO L225 Difference]: With dead ends: 3587 [2021-11-12 23:02:44,740 INFO L226 Difference]: Without dead ends: 1864 [2021-11-12 23:02:44,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:02:44,742 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 54 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10664.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10935.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:44,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 589 Invalid, 175 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [6 Valid, 168 Invalid, 1 Unknown, 0 Unchecked, 10935.62ms Time] [2021-11-12 23:02:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-11-12 23:02:44,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1824. [2021-11-12 23:02:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 1.448710916072408) internal successors, (2641), 1823 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2641 transitions. [2021-11-12 23:02:44,801 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2641 transitions. Word has length 152 [2021-11-12 23:02:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:44,802 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 2641 transitions. [2021-11-12 23:02:44,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2641 transitions. [2021-11-12 23:02:44,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 23:02:44,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:44,803 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:02:44,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:45,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:02:45,006 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:45,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1116644251, now seen corresponding path program 1 times [2021-11-12 23:02:45,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:45,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118465308] [2021-11-12 23:02:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:45,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:45,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:45,008 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:45,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:02:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:45,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:02:45,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:45,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:45,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:45,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:45,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:45,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:45,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:45,886 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:02:45,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:02:45,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:45,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:45,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:46,293 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:02:46,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:02:47,461 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:02:47,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:02:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:02:47,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:02:48,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:48,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118465308] [2021-11-12 23:02:48,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118465308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:02:48,136 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:02:48,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:02:48,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995272500] [2021-11-12 23:02:48,136 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:02:48,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:02:48,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:48,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:02:48,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:02:48,137 INFO L87 Difference]: Start difference. First operand 1824 states and 2641 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:50,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:52,172 WARN L515 Checker$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 23:03:04,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:10,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:12,713 INFO L93 Difference]: Finished difference Result 3892 states and 5619 transitions. [2021-11-12 23:03:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:03:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-12 23:03:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:12,721 INFO L225 Difference]: With dead ends: 3892 [2021-11-12 23:03:12,721 INFO L226 Difference]: Without dead ends: 2091 [2021-11-12 23:03:12,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:03:12,724 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 246 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 70 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23834.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.01ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24412.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:12,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 511 Invalid, 487 Unknown, 0 Unchecked, 3.01ms Time], IncrementalHoareTripleChecker [70 Valid, 415 Invalid, 2 Unknown, 0 Unchecked, 24412.94ms Time] [2021-11-12 23:03:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-11-12 23:03:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1824. [2021-11-12 23:03:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 1.4311574328030718) internal successors, (2609), 1823 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:03:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2609 transitions. [2021-11-12 23:03:12,798 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2609 transitions. Word has length 158 [2021-11-12 23:03:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:12,798 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 2609 transitions. [2021-11-12 23:03:12,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:03:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2609 transitions. [2021-11-12 23:03:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-12 23:03:12,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:12,801 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:03:12,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-12 23:03:13,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:03:13,013 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:13,013 INFO L85 PathProgramCache]: Analyzing trace with hash -180639295, now seen corresponding path program 1 times [2021-11-12 23:03:13,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:13,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188237224] [2021-11-12 23:03:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:13,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:13,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:13,016 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:13,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:03:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:13,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:03:13,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:13,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:13,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:13,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:13,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:13,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:13,930 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:03:13,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:03:14,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:14,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:14,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:14,298 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:03:14,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:03:15,629 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:03:15,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:03:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:03:15,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:03:16,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:03:16,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188237224] [2021-11-12 23:03:16,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188237224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:03:16,306 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:03:16,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:03:16,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921194571] [2021-11-12 23:03:16,306 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:03:16,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:03:16,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:03:16,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:03:16,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:03:16,307 INFO L87 Difference]: Start difference. First operand 1824 states and 2609 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:03:18,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:27,622 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:30,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:35,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:37,641 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 23:03:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:38,336 INFO L93 Difference]: Finished difference Result 3922 states and 5591 transitions. [2021-11-12 23:03:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:03:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-12 23:03:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:38,342 INFO L225 Difference]: With dead ends: 3922 [2021-11-12 23:03:38,342 INFO L226 Difference]: Without dead ends: 2121 [2021-11-12 23:03:38,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:03:38,345 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 263 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 71 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21326.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.98ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21862.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:38,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 490 Invalid, 473 Unknown, 0 Unchecked, 2.98ms Time], IncrementalHoareTripleChecker [71 Valid, 400 Invalid, 2 Unknown, 0 Unchecked, 21862.22ms Time] [2021-11-12 23:03:38,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-11-12 23:03:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1824. [2021-11-12 23:03:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 1.4152495885902359) internal successors, (2580), 1823 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:03:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2580 transitions. [2021-11-12 23:03:38,416 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2580 transitions. Word has length 159 [2021-11-12 23:03:38,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:38,417 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 2580 transitions. [2021-11-12 23:03:38,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:03:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2580 transitions. [2021-11-12 23:03:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 23:03:38,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:38,418 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:03:38,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:38,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:03:38,619 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:38,619 INFO L85 PathProgramCache]: Analyzing trace with hash 619554789, now seen corresponding path program 1 times [2021-11-12 23:03:38,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:38,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225459024] [2021-11-12 23:03:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:38,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:38,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:38,621 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:38,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:03:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:39,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:03:39,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:39,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:39,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:39,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:39,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:39,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:39,300 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:03:39,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:03:39,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:39,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:39,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:39,657 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:03:39,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:03:41,242 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:03:41,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:03:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:03:41,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:03:41,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:03:41,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225459024] [2021-11-12 23:03:41,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225459024] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:03:41,956 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:03:41,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:03:41,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532278562] [2021-11-12 23:03:41,956 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:03:41,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:03:41,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:03:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:03:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:03:41,957 INFO L87 Difference]: Start difference. First operand 1824 states and 2580 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:03:43,976 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 23:03:45,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:02,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:04,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:09,116 WARN L515 Checker$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 23:04:10,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:11,252 INFO L93 Difference]: Finished difference Result 3950 states and 5573 transitions. [2021-11-12 23:04:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:11,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-12 23:04:11,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:11,257 INFO L225 Difference]: With dead ends: 3950 [2021-11-12 23:04:11,257 INFO L226 Difference]: Without dead ends: 2149 [2021-11-12 23:04:11,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:04:11,258 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 242 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 71 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28440.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.41ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29114.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:11,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 631 Invalid, 595 Unknown, 0 Unchecked, 3.41ms Time], IncrementalHoareTripleChecker [71 Valid, 522 Invalid, 2 Unknown, 0 Unchecked, 29114.10ms Time] [2021-11-12 23:04:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-11-12 23:04:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1867. [2021-11-12 23:04:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.4056806002143623) internal successors, (2623), 1866 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:11,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2623 transitions. [2021-11-12 23:04:11,343 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2623 transitions. Word has length 161 [2021-11-12 23:04:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:11,344 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2623 transitions. [2021-11-12 23:04:11,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2623 transitions. [2021-11-12 23:04:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-12 23:04:11,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:11,347 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:11,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:11,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:11,560 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:11,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:11,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1378495708, now seen corresponding path program 1 times [2021-11-12 23:04:11,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:11,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104716447] [2021-11-12 23:04:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:11,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:11,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:11,562 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:11,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_913b565d-c918-4a74-8ad8-5f1c600368b8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:04:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:12,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:04:12,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:12,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:12,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:12,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:12,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:04:12,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:12,263 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:04:12,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:04:12,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:12,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:12,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:12,604 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:04:12,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:04:14,322 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:04:14,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:04:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:04:14,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:04:15,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:15,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104716447] [2021-11-12 23:04:15,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104716447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:15,033 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:15,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:04:15,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040015569] [2021-11-12 23:04:15,033 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:15,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:04:15,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:15,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:04:15,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:04:15,034 INFO L87 Difference]: Start difference. First operand 1867 states and 2623 transitions. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:17,054 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 []