./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8 --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 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:54:24,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:54:24,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:54:24,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:54:24,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:54:24,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:54:24,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:54:24,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:54:24,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:54:24,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:54:24,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:54:24,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:54:24,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:54:24,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:54:24,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:54:24,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:54:24,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:54:24,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:54:24,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:54:24,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:54:24,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:54:24,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:54:24,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:54:24,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:54:24,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:54:24,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:54:24,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:54:24,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:54:24,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:54:24,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:54:24,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:54:24,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:54:24,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:54:24,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:54:24,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:54:24,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:54:24,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:54:24,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:54:24,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:54:24,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:54:24,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:54:24,787 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:54:24,844 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:54:24,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:54:24,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:54:24,850 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:54:24,851 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:54:24,851 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:54:24,851 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:54:24,852 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:54:24,859 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:54:24,859 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:54:24,859 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:54:24,860 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:54:24,860 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:54:24,860 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:54:24,860 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:54:24,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:54:24,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:54:24,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:54:24,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:54:24,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:54:24,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:54:24,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:54:24,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:54:24,863 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:54:24,863 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:54:24,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:54:24,864 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:54:24,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:54:24,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:54:24,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:54:24,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:54:24,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:54:24,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:54:24,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:54:24,866 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:54:24,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:54:24,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:54:24,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:54:24,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:54:24,867 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_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2021-11-07 00:54:25,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:54:25,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:54:25,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:54:25,249 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:54:25,250 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:54:25,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-07 00:54:25,343 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/data/bb2e27441/17b632984c8f445398d79cafa4a616f6/FLAGf2554c872 [2021-11-07 00:54:26,072 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:54:26,073 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-07 00:54:26,093 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/data/bb2e27441/17b632984c8f445398d79cafa4a616f6/FLAGf2554c872 [2021-11-07 00:54:26,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/data/bb2e27441/17b632984c8f445398d79cafa4a616f6 [2021-11-07 00:54:26,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:54:26,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:54:26,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:54:26,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:54:26,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:54:26,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:54:26" (1/1) ... [2021-11-07 00:54:26,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b439181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:26, skipping insertion in model container [2021-11-07 00:54:26,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:54:26" (1/1) ... [2021-11-07 00:54:26,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:54:26,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:54:26,872 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_534cf765-a772-4b0e-b5c6-720d5492377d/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-07 00:54:26,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:54:26,902 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) [2021-11-07 00:54:26,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@794630d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:26, skipping insertion in model container [2021-11-07 00:54:26,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:54:26,904 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:54:26,906 INFO L168 Benchmark]: Toolchain (without parser) took 674.02 ms. Allocated memory is still 92.3 MB. Free memory was 69.4 MB in the beginning and 57.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:54:26,907 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 92.3 MB. Free memory was 67.9 MB in the beginning and 67.9 MB in the end (delta: 22.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:54:26,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 671.61 ms. Allocated memory is still 92.3 MB. Free memory was 69.2 MB in the beginning and 57.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:54:26,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 92.3 MB. Free memory was 67.9 MB in the beginning and 67.9 MB in the end (delta: 22.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 671.61 ms. Allocated memory is still 92.3 MB. Free memory was 69.2 MB in the beginning and 57.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * 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_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8 --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 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:54:29,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:54:29,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:54:29,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:54:29,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:54:29,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:54:29,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:54:29,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:54:29,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:54:29,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:54:29,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:54:29,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:54:29,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:54:29,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:54:29,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:54:29,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:54:29,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:54:29,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:54:29,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:54:29,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:54:29,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:54:29,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:54:29,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:54:29,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:54:29,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:54:29,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:54:29,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:54:29,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:54:29,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:54:29,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:54:29,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:54:29,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:54:29,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:54:29,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:54:29,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:54:29,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:54:29,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:54:29,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:54:29,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:54:29,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:54:29,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:54:29,796 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:54:29,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:54:29,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:54:29,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:54:29,851 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:54:29,851 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:54:29,852 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:54:29,852 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:54:29,852 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:54:29,852 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:54:29,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:54:29,856 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:54:29,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:54:29,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:54:29,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:54:29,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:54:29,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:54:29,858 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:54:29,858 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:54:29,858 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:54:29,859 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:54:29,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:54:29,859 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:54:29,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:54:29,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:54:29,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:54:29,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:54:29,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:54:29,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:54:29,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:54:29,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:54:29,862 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:54:29,862 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:54:29,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:54:29,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:54:29,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:54:29,863 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_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2021-11-07 00:54:30,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:54:30,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:54:30,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:54:30,377 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:54:30,377 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:54:30,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-07 00:54:30,469 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/data/8c0ed3bb5/732572764ffa4e8db0a7f64f0308e14b/FLAG6c31d9b9d [2021-11-07 00:54:31,197 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:54:31,197 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-07 00:54:31,225 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/data/8c0ed3bb5/732572764ffa4e8db0a7f64f0308e14b/FLAG6c31d9b9d [2021-11-07 00:54:31,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/data/8c0ed3bb5/732572764ffa4e8db0a7f64f0308e14b [2021-11-07 00:54:31,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:54:31,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:54:31,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:54:31,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:54:31,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:54:31,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:54:31" (1/1) ... [2021-11-07 00:54:31,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd11d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:31, skipping insertion in model container [2021-11-07 00:54:31,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:54:31" (1/1) ... [2021-11-07 00:54:31,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:54:31,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:54:31,982 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_534cf765-a772-4b0e-b5c6-720d5492377d/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-07 00:54:32,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:54:32,039 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:54:32,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:54:32,232 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_534cf765-a772-4b0e-b5c6-720d5492377d/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-07 00:54:32,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:54:32,260 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:54:32,450 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_534cf765-a772-4b0e-b5c6-720d5492377d/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-07 00:54:32,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:54:32,488 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:54:32,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32 WrapperNode [2021-11-07 00:54:32,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:54:32,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:54:32,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:54:32,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:54:32,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32" (1/1) ... [2021-11-07 00:54:32,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32" (1/1) ... [2021-11-07 00:54:32,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:54:32,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:54:32,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:54:32,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:54:32,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32" (1/1) ... [2021-11-07 00:54:32,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32" (1/1) ... [2021-11-07 00:54:32,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32" (1/1) ... [2021-11-07 00:54:32,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32" (1/1) ... [2021-11-07 00:54:32,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32" (1/1) ... [2021-11-07 00:54:32,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32" (1/1) ... [2021-11-07 00:54:32,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32" (1/1) ... [2021-11-07 00:54:32,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:54:32,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:54:32,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:54:32,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:54:32,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32" (1/1) ... [2021-11-07 00:54:32,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:54:32,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:54:32,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:54:32,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:54:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:54:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 00:54:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:54:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 00:54:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 00:54:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 00:54:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:54:32,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:54:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 00:54:33,168 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 00:54:43,530 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 00:54:43,530 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 00:54:43,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:54:43,540 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 00:54:43,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:54:43 BoogieIcfgContainer [2021-11-07 00:54:43,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:54:43,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:54:43,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:54:43,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:54:43,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:54:31" (1/3) ... [2021-11-07 00:54:43,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3603b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:54:43, skipping insertion in model container [2021-11-07 00:54:43,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:54:32" (2/3) ... [2021-11-07 00:54:43,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3603b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:54:43, skipping insertion in model container [2021-11-07 00:54:43,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:54:43" (3/3) ... [2021-11-07 00:54:43,554 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-1.c [2021-11-07 00:54:43,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:54:43,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 00:54:43,620 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:54:43,628 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 [2021-11-07 00:54:43,628 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 00:54:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 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) [2021-11-07 00:54:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 00:54:43,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:43,664 INFO L513 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] [2021-11-07 00:54:43,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:43,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1590777092, now seen corresponding path program 1 times [2021-11-07 00:54:43,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:43,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025357040] [2021-11-07 00:54:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:43,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:43,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:43,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:43,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:54:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:44,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 00:54:44,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:44,533 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 [2021-11-07 00:54:44,547 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 [2021-11-07 00:54:44,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:54:44,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 00:54:44,674 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:54:44,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-07 00:54:44,728 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 [2021-11-07 00:54:45,306 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-07 00:54:45,307 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 717 treesize of output 669 [2021-11-07 00:54:45,382 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:54:45,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 00:54:45,397 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 221 treesize of output 210 [2021-11-07 00:54:45,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,521 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 129 treesize of output 101 [2021-11-07 00:54:45,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,559 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 [2021-11-07 00:54:45,710 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 00:54:45,710 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 [2021-11-07 00:54:45,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:54:45,751 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 [2021-11-07 00:54:45,804 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 [2021-11-07 00:54:45,810 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 [2021-11-07 00:54:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:46,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:46,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:54:46,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 00:54:46,288 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:54:46,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 00:54:46,480 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:54:46,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-07 00:54:46,493 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:54:46,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-07 00:54:46,510 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:54:46,514 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-07 00:54:46,534 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:54:46,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-07 00:54:46,568 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:54:46,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-07 00:54:46,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 00:54:46,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-07 00:54:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:47,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:47,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025357040] [2021-11-07 00:54:47,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025357040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:47,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:47,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:54:47,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66353797] [2021-11-07 00:54:47,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:54:47,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:47,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:54:47,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:54:47,236 INFO L87 Difference]: Start difference. First operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 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) [2021-11-07 00:55:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:11,886 INFO L93 Difference]: Finished difference Result 317 states and 539 transitions. [2021-11-07 00:55:11,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:55:11,889 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 [2021-11-07 00:55:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:11,903 INFO L225 Difference]: With dead ends: 317 [2021-11-07 00:55:11,903 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 00:55:11,907 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:55:11,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 00:55:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-07 00:55:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5625) internal successors, (225), 144 states have internal predecessors, (225), 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) [2021-11-07 00:55:11,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 225 transitions. [2021-11-07 00:55:11,961 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 225 transitions. Word has length 45 [2021-11-07 00:55:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:11,962 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 225 transitions. [2021-11-07 00:55:11,962 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) [2021-11-07 00:55:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 225 transitions. [2021-11-07 00:55:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 00:55:11,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:11,966 INFO L513 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] [2021-11-07 00:55:11,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:12,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:55:12,184 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:12,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:12,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1806796926, now seen corresponding path program 1 times [2021-11-07 00:55:12,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:12,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913346313] [2021-11-07 00:55:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:12,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:12,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:12,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:12,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:55:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:12,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:55:12,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:12,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:12,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:12,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:12,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:12,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:55:13,371 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 00:55:13,371 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 [2021-11-07 00:55:17,032 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 00:55:17,033 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 [2021-11-07 00:55:25,359 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 00:55:25,360 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 [2021-11-07 00:55:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:25,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:33,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:55:33,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913346313] [2021-11-07 00:55:33,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913346313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:33,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:33,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-07 00:55:33,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778935017] [2021-11-07 00:55:33,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:55:33,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:33,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:55:33,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-07 00:55:33,885 INFO L87 Difference]: Start difference. First operand 145 states and 225 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) [2021-11-07 00:55:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:56,913 INFO L93 Difference]: Finished difference Result 308 states and 478 transitions. [2021-11-07 00:55:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:55:56,915 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 [2021-11-07 00:55:56,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:56,918 INFO L225 Difference]: With dead ends: 308 [2021-11-07 00:55:56,918 INFO L226 Difference]: Without dead ends: 173 [2021-11-07 00:55:56,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-07 00:55:56,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-07 00:55:56,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2021-11-07 00:55:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5741935483870968) internal successors, (244), 155 states have internal predecessors, (244), 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) [2021-11-07 00:55:56,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 244 transitions. [2021-11-07 00:55:56,935 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 244 transitions. Word has length 45 [2021-11-07 00:55:56,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:56,936 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 244 transitions. [2021-11-07 00:55:56,936 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) [2021-11-07 00:55:56,937 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 244 transitions. [2021-11-07 00:55:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 00:55:56,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:56,940 INFO L513 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] [2021-11-07 00:55:56,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:55:57,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:55:57,148 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:57,149 INFO L85 PathProgramCache]: Analyzing trace with hash 774668882, now seen corresponding path program 1 times [2021-11-07 00:55:57,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:55:57,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915982243] [2021-11-07 00:55:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:57,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:55:57,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:55:57,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:55:57,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:55:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:55:57,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:57,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:55:57,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:55:58,379 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 00:55:58,380 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 [2021-11-07 00:56:01,841 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 00:56:01,842 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 [2021-11-07 00:56:09,168 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 00:56:09,168 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 [2021-11-07 00:56:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:09,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:56:09,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:09,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915982243] [2021-11-07 00:56:09,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915982243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:09,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:09,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 00:56:09,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814337164] [2021-11-07 00:56:09,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 00:56:09,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 00:56:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 00:56:09,712 INFO L87 Difference]: Start difference. First operand 156 states and 244 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) [2021-11-07 00:56:52,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:52,550 INFO L93 Difference]: Finished difference Result 433 states and 675 transitions. [2021-11-07 00:56:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:56:52,552 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 [2021-11-07 00:56:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:52,555 INFO L225 Difference]: With dead ends: 433 [2021-11-07 00:56:52,556 INFO L226 Difference]: Without dead ends: 298 [2021-11-07 00:56:52,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 00:56:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-07 00:56:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 172. [2021-11-07 00:56:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5730994152046784) internal successors, (269), 171 states have internal predecessors, (269), 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) [2021-11-07 00:56:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 269 transitions. [2021-11-07 00:56:52,582 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 269 transitions. Word has length 58 [2021-11-07 00:56:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:52,582 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 269 transitions. [2021-11-07 00:56:52,582 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) [2021-11-07 00:56:52,583 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 269 transitions. [2021-11-07 00:56:52,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 00:56:52,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:52,586 INFO L513 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] [2021-11-07 00:56:52,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:52,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:52,801 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:52,802 INFO L85 PathProgramCache]: Analyzing trace with hash -713896793, now seen corresponding path program 1 times [2021-11-07 00:56:52,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:52,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724126530] [2021-11-07 00:56:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:52,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:52,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:52,804 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:52,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:56:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:53,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:53,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:53,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:53,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:53,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:56:53,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:56:54,140 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 00:56:54,140 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 [2021-11-07 00:56:57,602 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 00:56:57,602 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 [2021-11-07 00:57:04,407 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 00:57:04,408 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 [2021-11-07 00:57:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:04,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:05,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:05,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724126530] [2021-11-07 00:57:05,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724126530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:05,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:05,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 00:57:05,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931778490] [2021-11-07 00:57:05,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 00:57:05,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:05,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 00:57:05,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 00:57:05,042 INFO L87 Difference]: Start difference. First operand 172 states and 269 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) [2021-11-07 00:57:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:44,894 INFO L93 Difference]: Finished difference Result 479 states and 750 transitions. [2021-11-07 00:57:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:57:44,896 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 [2021-11-07 00:57:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:44,898 INFO L225 Difference]: With dead ends: 479 [2021-11-07 00:57:44,899 INFO L226 Difference]: Without dead ends: 328 [2021-11-07 00:57:44,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 00:57:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-07 00:57:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 194. [2021-11-07 00:57:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.5544041450777202) internal successors, (300), 193 states have internal predecessors, (300), 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) [2021-11-07 00:57:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 300 transitions. [2021-11-07 00:57:44,919 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 300 transitions. Word has length 59 [2021-11-07 00:57:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:44,919 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 300 transitions. [2021-11-07 00:57:44,920 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) [2021-11-07 00:57:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 300 transitions. [2021-11-07 00:57:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 00:57:44,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:44,924 INFO L513 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] [2021-11-07 00:57:44,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:45,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:45,135 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:45,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1173006651, now seen corresponding path program 1 times [2021-11-07 00:57:45,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:45,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503467445] [2021-11-07 00:57:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:45,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:45,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:45,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:45,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:57:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:45,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:57:45,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:45,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:45,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:45,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:45,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:57:45,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:57:46,457 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 00:57:46,458 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 [2021-11-07 00:57:49,851 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 00:57:49,851 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 [2021-11-07 00:57:56,825 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 00:57:56,825 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 [2021-11-07 00:57:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:57,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:57,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:57,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503467445] [2021-11-07 00:57:57,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503467445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:57,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:57,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 00:57:57,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665843415] [2021-11-07 00:57:57,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 00:57:57,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:57,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 00:57:57,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 00:57:57,422 INFO L87 Difference]: Start difference. First operand 194 states and 300 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) [2021-11-07 00:58:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:30,348 INFO L93 Difference]: Finished difference Result 499 states and 773 transitions. [2021-11-07 00:58:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:58:30,351 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 [2021-11-07 00:58:30,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:30,353 INFO L225 Difference]: With dead ends: 499 [2021-11-07 00:58:30,353 INFO L226 Difference]: Without dead ends: 326 [2021-11-07 00:58:30,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 00:58:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-07 00:58:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 207. [2021-11-07 00:58:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.5388349514563107) internal successors, (317), 206 states have internal predecessors, (317), 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) [2021-11-07 00:58:30,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 317 transitions. [2021-11-07 00:58:30,381 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 317 transitions. Word has length 59 [2021-11-07 00:58:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:30,381 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 317 transitions. [2021-11-07 00:58:30,381 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) [2021-11-07 00:58:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 317 transitions. [2021-11-07 00:58:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 00:58:30,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:30,391 INFO L513 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] [2021-11-07 00:58:30,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:30,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:30,592 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash 320889874, now seen corresponding path program 1 times [2021-11-07 00:58:30,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:30,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619537252] [2021-11-07 00:58:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:30,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:30,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:30,594 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:30,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:58:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:31,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:58:31,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:31,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:31,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:31,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:31,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:58:31,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:58:31,726 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 00:58:31,726 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 [2021-11-07 00:58:35,141 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 00:58:35,143 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 [2021-11-07 00:58:42,836 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 00:58:42,836 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 [2021-11-07 00:58:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:43,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:43,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:43,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619537252] [2021-11-07 00:58:43,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619537252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:43,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:43,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 00:58:43,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777860810] [2021-11-07 00:58:43,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 00:58:43,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 00:58:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 00:58:43,463 INFO L87 Difference]: Start difference. First operand 207 states and 317 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) [2021-11-07 00:59:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:32,051 INFO L93 Difference]: Finished difference Result 548 states and 844 transitions. [2021-11-07 00:59:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:59:32,053 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 [2021-11-07 00:59:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:32,055 INFO L225 Difference]: With dead ends: 548 [2021-11-07 00:59:32,056 INFO L226 Difference]: Without dead ends: 362 [2021-11-07 00:59:32,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 00:59:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-07 00:59:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 225. [2021-11-07 00:59:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5446428571428572) internal successors, (346), 224 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) [2021-11-07 00:59:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 346 transitions. [2021-11-07 00:59:32,073 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 346 transitions. Word has length 59 [2021-11-07 00:59:32,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:32,073 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 346 transitions. [2021-11-07 00:59:32,073 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) [2021-11-07 00:59:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 346 transitions. [2021-11-07 00:59:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 00:59:32,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:32,076 INFO L513 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] [2021-11-07 00:59:32,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:32,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:32,287 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1682330414, now seen corresponding path program 1 times [2021-11-07 00:59:32,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:32,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983042159] [2021-11-07 00:59:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:32,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:32,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:32,290 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:32,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:59:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:33,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:59:33,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:33,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:59:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:59:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:59:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:59:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 00:59:33,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 00:59:33,459 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 00:59:33,460 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 [2021-11-07 00:59:37,032 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 00:59:37,032 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 [2021-11-07 00:59:44,770 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 00:59:44,771 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 [2021-11-07 00:59:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:44,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:45,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:45,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983042159] [2021-11-07 00:59:45,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983042159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:45,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:45,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 00:59:45,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809660352] [2021-11-07 00:59:45,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 00:59:45,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:45,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 00:59:45,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 00:59:45,309 INFO L87 Difference]: Start difference. First operand 225 states and 346 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) [2021-11-07 01:00:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:20,882 INFO L93 Difference]: Finished difference Result 554 states and 858 transitions. [2021-11-07 01:00:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:00:20,884 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 [2021-11-07 01:00:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:20,887 INFO L225 Difference]: With dead ends: 554 [2021-11-07 01:00:20,887 INFO L226 Difference]: Without dead ends: 350 [2021-11-07 01:00:20,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:00:20,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-07 01:00:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 230. [2021-11-07 01:00:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5458515283842795) internal successors, (354), 229 states have internal predecessors, (354), 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) [2021-11-07 01:00:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 354 transitions. [2021-11-07 01:00:20,929 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 354 transitions. Word has length 59 [2021-11-07 01:00:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:20,929 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 354 transitions. [2021-11-07 01:00:20,930 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) [2021-11-07 01:00:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 354 transitions. [2021-11-07 01:00:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:00:20,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:20,932 INFO L513 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] [2021-11-07 01:00:20,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:21,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:21,142 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:00:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1666972293, now seen corresponding path program 1 times [2021-11-07 01:00:21,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:21,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798980678] [2021-11-07 01:00:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:21,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:21,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:21,144 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:21,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:00:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:21,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:00:21,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:21,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:00:21,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:00:21,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:00:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:00:21,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:00:21,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:00:22,270 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:00:22,270 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 [2021-11-07 01:00:25,623 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:00:25,623 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 [2021-11-07 01:00:32,477 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:00:32,477 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 [2021-11-07 01:00:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:32,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:32,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:32,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798980678] [2021-11-07 01:00:32,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798980678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:32,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:32,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:00:32,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758450986] [2021-11-07 01:00:32,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:00:32,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:00:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:00:32,958 INFO L87 Difference]: Start difference. First operand 230 states and 354 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) [2021-11-07 01:01:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:18,649 INFO L93 Difference]: Finished difference Result 550 states and 850 transitions. [2021-11-07 01:01:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:01:18,651 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 [2021-11-07 01:01:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:18,653 INFO L225 Difference]: With dead ends: 550 [2021-11-07 01:01:18,653 INFO L226 Difference]: Without dead ends: 341 [2021-11-07 01:01:18,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:01:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-07 01:01:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 231. [2021-11-07 01:01:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.5304347826086957) internal successors, (352), 230 states have internal predecessors, (352), 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) [2021-11-07 01:01:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 352 transitions. [2021-11-07 01:01:18,667 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 352 transitions. Word has length 60 [2021-11-07 01:01:18,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:18,667 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 352 transitions. [2021-11-07 01:01:18,668 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) [2021-11-07 01:01:18,668 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 352 transitions. [2021-11-07 01:01:18,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:01:18,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:18,669 INFO L513 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] [2021-11-07 01:01:18,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:18,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:18,878 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:01:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:18,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1752756352, now seen corresponding path program 1 times [2021-11-07 01:01:18,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:18,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571452893] [2021-11-07 01:01:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:18,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:18,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:18,880 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:18,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:01:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:19,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:01:19,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:19,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:19,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:19,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:19,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:19,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:01:20,190 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:01:20,190 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 [2021-11-07 01:01:23,622 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:01:23,623 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 [2021-11-07 01:01:30,821 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:01:30,821 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 [2021-11-07 01:01:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:31,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:31,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:31,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571452893] [2021-11-07 01:01:31,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571452893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:31,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:31,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:01:31,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372516809] [2021-11-07 01:01:31,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:01:31,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:31,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:01:31,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:01:31,414 INFO L87 Difference]: Start difference. First operand 231 states and 352 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) [2021-11-07 01:02:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:07,715 INFO L93 Difference]: Finished difference Result 564 states and 863 transitions. [2021-11-07 01:02:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:02:07,717 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 [2021-11-07 01:02:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:07,720 INFO L225 Difference]: With dead ends: 564 [2021-11-07 01:02:07,720 INFO L226 Difference]: Without dead ends: 354 [2021-11-07 01:02:07,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:02:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-07 01:02:07,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 245. [2021-11-07 01:02:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.5081967213114753) internal successors, (368), 244 states have internal predecessors, (368), 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) [2021-11-07 01:02:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 368 transitions. [2021-11-07 01:02:07,733 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 368 transitions. Word has length 61 [2021-11-07 01:02:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:07,734 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 368 transitions. [2021-11-07 01:02:07,734 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) [2021-11-07 01:02:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 368 transitions. [2021-11-07 01:02:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:02:07,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:07,736 INFO L513 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] [2021-11-07 01:02:07,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:07,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:07,951 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:07,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1654924640, now seen corresponding path program 1 times [2021-11-07 01:02:07,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:07,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070459002] [2021-11-07 01:02:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:07,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:07,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:07,954 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:07,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:02:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:08,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:02:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:08,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:08,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:08,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:08,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:08,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:09,382 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:02:09,383 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 [2021-11-07 01:02:12,788 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:02:12,788 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 [2021-11-07 01:02:19,961 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:02:19,962 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 [2021-11-07 01:02:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:20,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:20,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:20,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070459002] [2021-11-07 01:02:20,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070459002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:20,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:20,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:02:20,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499981252] [2021-11-07 01:02:20,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:02:20,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:20,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:02:20,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:02:20,486 INFO L87 Difference]: Start difference. First operand 245 states and 368 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) [2021-11-07 01:03:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:13,771 INFO L93 Difference]: Finished difference Result 578 states and 881 transitions. [2021-11-07 01:03:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:03:13,772 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 [2021-11-07 01:03:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:13,774 INFO L225 Difference]: With dead ends: 578 [2021-11-07 01:03:13,775 INFO L226 Difference]: Without dead ends: 354 [2021-11-07 01:03:13,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:03:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-07 01:03:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 245. [2021-11-07 01:03:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.4918032786885247) internal successors, (364), 244 states have internal predecessors, (364), 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) [2021-11-07 01:03:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 364 transitions. [2021-11-07 01:03:13,787 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 364 transitions. Word has length 62 [2021-11-07 01:03:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:13,788 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 364 transitions. [2021-11-07 01:03:13,788 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) [2021-11-07 01:03:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 364 transitions. [2021-11-07 01:03:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:03:13,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:13,790 INFO L513 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] [2021-11-07 01:03:13,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:14,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:14,004 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:14,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:14,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1043051208, now seen corresponding path program 1 times [2021-11-07 01:03:14,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:14,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671203838] [2021-11-07 01:03:14,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:14,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:14,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:14,006 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:14,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:03:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:14,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:03:14,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:15,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:15,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:15,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:15,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:15,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:15,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:15,440 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:03:15,440 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 [2021-11-07 01:03:16,664 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:03:16,664 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 [2021-11-07 01:03:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:16,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:17,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:17,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671203838] [2021-11-07 01:03:17,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671203838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:17,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:17,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:03:17,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148391709] [2021-11-07 01:03:17,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:17,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:17,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:17,056 INFO L87 Difference]: Start difference. First operand 245 states and 364 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) [2021-11-07 01:03:36,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:36,394 INFO L93 Difference]: Finished difference Result 498 states and 745 transitions. [2021-11-07 01:03:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:36,402 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 [2021-11-07 01:03:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:36,405 INFO L225 Difference]: With dead ends: 498 [2021-11-07 01:03:36,405 INFO L226 Difference]: Without dead ends: 274 [2021-11-07 01:03:36,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:03:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-07 01:03:36,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 267. [2021-11-07 01:03:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.481203007518797) internal successors, (394), 266 states have internal predecessors, (394), 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) [2021-11-07 01:03:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 394 transitions. [2021-11-07 01:03:36,421 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 394 transitions. Word has length 62 [2021-11-07 01:03:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:36,425 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 394 transitions. [2021-11-07 01:03:36,425 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) [2021-11-07 01:03:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 394 transitions. [2021-11-07 01:03:36,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:03:36,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:36,427 INFO L513 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] [2021-11-07 01:03:36,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:36,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:36,643 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash -970686709, now seen corresponding path program 1 times [2021-11-07 01:03:36,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:36,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049911278] [2021-11-07 01:03:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:36,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:36,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:36,646 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:36,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:03:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:37,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:03:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:37,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:37,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:37,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:37,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:37,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:37,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:37,841 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:03:37,843 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 [2021-11-07 01:03:37,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:37,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:37,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:38,192 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:03:38,192 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 [2021-11-07 01:03:40,553 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:03:40,553 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 [2021-11-07 01:03:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:03:40,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:03:41,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:41,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049911278] [2021-11-07 01:03:41,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049911278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:41,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:41,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:03:41,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342953773] [2021-11-07 01:03:41,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:03:41,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:41,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:03:41,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:03:41,049 INFO L87 Difference]: Start difference. First operand 267 states and 394 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) [2021-11-07 01:04:08,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:08,914 INFO L93 Difference]: Finished difference Result 753 states and 1130 transitions. [2021-11-07 01:04:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:04:08,916 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 [2021-11-07 01:04:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:08,919 INFO L225 Difference]: With dead ends: 753 [2021-11-07 01:04:08,920 INFO L226 Difference]: Without dead ends: 507 [2021-11-07 01:04:08,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:04:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-07 01:04:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 321. [2021-11-07 01:04:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.503125) internal successors, (481), 320 states have internal predecessors, (481), 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) [2021-11-07 01:04:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 481 transitions. [2021-11-07 01:04:08,937 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 481 transitions. Word has length 84 [2021-11-07 01:04:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:08,938 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 481 transitions. [2021-11-07 01:04:08,938 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) [2021-11-07 01:04:08,939 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 481 transitions. [2021-11-07 01:04:08,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:04:08,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:08,940 INFO L513 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] [2021-11-07 01:04:08,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:09,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:09,156 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:04:09,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:09,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1086434060, now seen corresponding path program 1 times [2021-11-07 01:04:09,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:09,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958235463] [2021-11-07 01:04:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:09,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:09,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:09,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:09,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:04:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:10,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:10,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:10,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:10,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:10,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:10,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:10,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:10,555 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:04:10,556 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 [2021-11-07 01:04:10,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:10,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:10,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:10,962 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:04:10,962 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 [2021-11-07 01:04:13,574 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:04:13,575 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 [2021-11-07 01:04:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:04:13,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:04:14,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:14,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958235463] [2021-11-07 01:04:14,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958235463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:14,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:14,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:04:14,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670137227] [2021-11-07 01:04:14,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:04:14,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:14,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:04:14,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:04:14,079 INFO L87 Difference]: Start difference. First operand 321 states and 481 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) [2021-11-07 01:04:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:48,825 INFO L93 Difference]: Finished difference Result 819 states and 1245 transitions. [2021-11-07 01:04:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:04:48,827 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 [2021-11-07 01:04:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:48,830 INFO L225 Difference]: With dead ends: 819 [2021-11-07 01:04:48,830 INFO L226 Difference]: Without dead ends: 519 [2021-11-07 01:04:48,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:04:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-07 01:04:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 343. [2021-11-07 01:04:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.5321637426900585) internal successors, (524), 342 states have internal predecessors, (524), 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) [2021-11-07 01:04:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 524 transitions. [2021-11-07 01:04:48,865 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 524 transitions. Word has length 85 [2021-11-07 01:04:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:48,865 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 524 transitions. [2021-11-07 01:04:48,866 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) [2021-11-07 01:04:48,866 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 524 transitions. [2021-11-07 01:04:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:04:48,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:48,868 INFO L513 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] [2021-11-07 01:04:48,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:49,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:49,083 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:04:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:49,084 INFO L85 PathProgramCache]: Analyzing trace with hash -400637440, now seen corresponding path program 1 times [2021-11-07 01:04:49,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:49,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974887225] [2021-11-07 01:04:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:49,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:49,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:49,086 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:49,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:04:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:50,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:50,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:50,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:50,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:50,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:50,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:50,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:50,644 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:04:50,645 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 [2021-11-07 01:04:50,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:50,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:50,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:51,059 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:04:51,059 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 [2021-11-07 01:04:53,083 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:04:53,083 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 [2021-11-07 01:04:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:04:53,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:04:53,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:53,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974887225] [2021-11-07 01:04:53,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974887225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:53,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:53,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:04:53,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879067108] [2021-11-07 01:04:53,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:04:53,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:53,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:04:53,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:04:53,754 INFO L87 Difference]: Start difference. First operand 343 states and 524 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) [2021-11-07 01:05:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:31,646 INFO L93 Difference]: Finished difference Result 864 states and 1336 transitions. [2021-11-07 01:05:31,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:05:31,647 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 [2021-11-07 01:05:31,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:31,651 INFO L225 Difference]: With dead ends: 864 [2021-11-07 01:05:31,651 INFO L226 Difference]: Without dead ends: 542 [2021-11-07 01:05:31,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:05:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-07 01:05:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 382. [2021-11-07 01:05:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.5459317585301837) internal successors, (589), 381 states have internal predecessors, (589), 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) [2021-11-07 01:05:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 589 transitions. [2021-11-07 01:05:31,670 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 589 transitions. Word has length 113 [2021-11-07 01:05:31,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:31,670 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 589 transitions. [2021-11-07 01:05:31,671 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) [2021-11-07 01:05:31,671 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 589 transitions. [2021-11-07 01:05:31,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:05:31,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:31,674 INFO L513 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, 1] [2021-11-07 01:05:31,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:31,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:31,887 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:05:31,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1898698953, now seen corresponding path program 1 times [2021-11-07 01:05:31,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:31,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488451875] [2021-11-07 01:05:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:31,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:31,889 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:31,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:05:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:33,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:33,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:05:33,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:05:33,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:33,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488451875] [2021-11-07 01:05:33,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488451875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:33,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:33,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:05:33,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538749278] [2021-11-07 01:05:33,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:05:33,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:33,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:05:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:05:33,904 INFO L87 Difference]: Start difference. First operand 382 states and 589 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 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) [2021-11-07 01:05:34,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:34,322 INFO L93 Difference]: Finished difference Result 1425 states and 2224 transitions. [2021-11-07 01:05:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:05:34,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 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 [2021-11-07 01:05:34,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:34,329 INFO L225 Difference]: With dead ends: 1425 [2021-11-07 01:05:34,329 INFO L226 Difference]: Without dead ends: 1064 [2021-11-07 01:05:34,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:05:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-11-07 01:05:34,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1056. [2021-11-07 01:05:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 1.5459715639810427) internal successors, (1631), 1055 states have internal predecessors, (1631), 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) [2021-11-07 01:05:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1631 transitions. [2021-11-07 01:05:34,367 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1631 transitions. Word has length 119 [2021-11-07 01:05:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:34,368 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1631 transitions. [2021-11-07 01:05:34,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 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) [2021-11-07 01:05:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1631 transitions. [2021-11-07 01:05:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:05:34,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:34,371 INFO L513 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, 1] [2021-11-07 01:05:34,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:34,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:34,588 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:05:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1972621621, now seen corresponding path program 1 times [2021-11-07 01:05:34,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:34,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168171752] [2021-11-07 01:05:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:34,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:34,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:34,591 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:34,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:05:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:36,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:36,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:36,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:36,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:36,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:36,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:05:36,396 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:05:36,396 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 [2021-11-07 01:05:36,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:05:36,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:05:36,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:05:36,820 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:05:36,820 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 [2021-11-07 01:05:39,135 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:05:39,136 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 [2021-11-07 01:05:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:05:39,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:05:39,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:39,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168171752] [2021-11-07 01:05:39,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168171752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:39,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:39,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:05:39,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093926160] [2021-11-07 01:05:39,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:05:39,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:39,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:05:39,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:05:39,830 INFO L87 Difference]: Start difference. First operand 1056 states and 1631 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) [2021-11-07 01:06:14,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:14,537 INFO L93 Difference]: Finished difference Result 2712 states and 4153 transitions. [2021-11-07 01:06:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:06:14,539 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 119 [2021-11-07 01:06:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:14,547 INFO L225 Difference]: With dead ends: 2712 [2021-11-07 01:06:14,547 INFO L226 Difference]: Without dead ends: 1677 [2021-11-07 01:06:14,549 INFO L786 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 [2021-11-07 01:06:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-11-07 01:06:14,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1167. [2021-11-07 01:06:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 1.5480274442538593) internal successors, (1805), 1166 states have internal predecessors, (1805), 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) [2021-11-07 01:06:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1805 transitions. [2021-11-07 01:06:14,604 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1805 transitions. Word has length 119 [2021-11-07 01:06:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:14,604 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1805 transitions. [2021-11-07 01:06:14,605 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) [2021-11-07 01:06:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1805 transitions. [2021-11-07 01:06:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 01:06:14,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:14,609 INFO L513 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, 1] [2021-11-07 01:06:14,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:06:14,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:14,815 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:14,816 INFO L85 PathProgramCache]: Analyzing trace with hash -796665206, now seen corresponding path program 1 times [2021-11-07 01:06:14,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:14,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621166088] [2021-11-07 01:06:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:14,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:14,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:14,818 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:14,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:06:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:06:16,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:16,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:16,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:16,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:16,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:17,031 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:06:17,031 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 [2021-11-07 01:06:17,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:17,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:17,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:17,463 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:06:17,464 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 [2021-11-07 01:06:19,864 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:06:19,864 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 [2021-11-07 01:06:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:06:20,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:06:20,585 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:20,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621166088] [2021-11-07 01:06:20,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621166088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:20,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:20,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:06:20,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171374334] [2021-11-07 01:06:20,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:06:20,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:06:20,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:06:20,587 INFO L87 Difference]: Start difference. First operand 1167 states and 1805 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 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) [2021-11-07 01:06:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:53,728 INFO L93 Difference]: Finished difference Result 2806 states and 4297 transitions. [2021-11-07 01:06:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:06:53,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 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 120 [2021-11-07 01:06:53,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:53,737 INFO L225 Difference]: With dead ends: 2806 [2021-11-07 01:06:53,737 INFO L226 Difference]: Without dead ends: 1660 [2021-11-07 01:06:53,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:06:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-11-07 01:06:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1167. [2021-11-07 01:06:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 1.5428816466552315) internal successors, (1799), 1166 states have internal predecessors, (1799), 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) [2021-11-07 01:06:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1799 transitions. [2021-11-07 01:06:53,809 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1799 transitions. Word has length 120 [2021-11-07 01:06:53,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:53,810 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1799 transitions. [2021-11-07 01:06:53,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 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) [2021-11-07 01:06:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1799 transitions. [2021-11-07 01:06:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 01:06:53,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:53,815 INFO L513 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] [2021-11-07 01:06:53,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:54,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:54,037 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:54,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1259356732, now seen corresponding path program 1 times [2021-11-07 01:06:54,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:54,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796736170] [2021-11-07 01:06:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:54,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:54,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:54,039 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:54,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:06:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:55,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:06:55,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 01:06:55,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 01:06:56,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:56,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796736170] [2021-11-07 01:06:56,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796736170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:56,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:56,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:06:56,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725405616] [2021-11-07 01:06:56,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:06:56,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:56,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:06:56,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:06:56,295 INFO L87 Difference]: Start difference. First operand 1167 states and 1799 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-11-07 01:06:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:58,435 INFO L93 Difference]: Finished difference Result 2340 states and 3611 transitions. [2021-11-07 01:06:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:06:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 [2021-11-07 01:06:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:58,442 INFO L225 Difference]: With dead ends: 2340 [2021-11-07 01:06:58,442 INFO L226 Difference]: Without dead ends: 1194 [2021-11-07 01:06:58,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:06:58,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-07 01:06:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1194. [2021-11-07 01:06:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 1.537300922045264) internal successors, (1834), 1193 states have internal predecessors, (1834), 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) [2021-11-07 01:06:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1834 transitions. [2021-11-07 01:06:58,513 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1834 transitions. Word has length 127 [2021-11-07 01:06:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:58,514 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 1834 transitions. [2021-11-07 01:06:58,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-11-07 01:06:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1834 transitions. [2021-11-07 01:06:58,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 01:06:58,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:58,519 INFO L513 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] [2021-11-07 01:06:58,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:58,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:58,735 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:58,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:58,736 INFO L85 PathProgramCache]: Analyzing trace with hash 636075130, now seen corresponding path program 1 times [2021-11-07 01:06:58,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:58,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184627690] [2021-11-07 01:06:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:58,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:58,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:58,739 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:58,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:07:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:00,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:07:00,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-07 01:07:00,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-07 01:07:01,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:01,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184627690] [2021-11-07 01:07:01,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184627690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:01,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:01,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:07:01,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557477051] [2021-11-07 01:07:01,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:07:01,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:01,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:07:01,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:07:01,012 INFO L87 Difference]: Start difference. First operand 1194 states and 1834 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-11-07 01:07:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:01,124 INFO L93 Difference]: Finished difference Result 2369 states and 3647 transitions. [2021-11-07 01:07:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:07:01,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 [2021-11-07 01:07:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:01,131 INFO L225 Difference]: With dead ends: 2369 [2021-11-07 01:07:01,131 INFO L226 Difference]: Without dead ends: 1196 [2021-11-07 01:07:01,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:07:01,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-11-07 01:07:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1196. [2021-11-07 01:07:01,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 1195 states have (on average 1.5364016736401673) internal successors, (1836), 1195 states have internal predecessors, (1836), 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) [2021-11-07 01:07:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1836 transitions. [2021-11-07 01:07:01,200 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1836 transitions. Word has length 127 [2021-11-07 01:07:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:01,201 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 1836 transitions. [2021-11-07 01:07:01,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-11-07 01:07:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1836 transitions. [2021-11-07 01:07:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-07 01:07:01,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:01,205 INFO L513 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] [2021-11-07 01:07:01,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:07:01,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:07:01,431 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:07:01,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:01,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1640288805, now seen corresponding path program 1 times [2021-11-07 01:07:01,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:07:01,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098148640] [2021-11-07 01:07:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:01,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:07:01,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:07:01,433 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:07:01,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:07:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:03,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:07:03,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:03,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:03,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:03,591 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:07:03,591 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 [2021-11-07 01:07:03,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:03,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:04,080 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:07:04,080 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 [2021-11-07 01:07:06,688 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:07:06,688 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 [2021-11-07 01:07:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:07:06,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:07:08,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:08,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098148640] [2021-11-07 01:07:08,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098148640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:08,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:08,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-07 01:07:08,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712471323] [2021-11-07 01:07:08,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:07:08,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:08,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:07:08,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:07:08,239 INFO L87 Difference]: Start difference. First operand 1196 states and 1836 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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) [2021-11-07 01:07:33,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:33,395 INFO L93 Difference]: Finished difference Result 2601 states and 3986 transitions. [2021-11-07 01:07:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:07:33,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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 129 [2021-11-07 01:07:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:33,404 INFO L225 Difference]: With dead ends: 2601 [2021-11-07 01:07:33,404 INFO L226 Difference]: Without dead ends: 1428 [2021-11-07 01:07:33,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 250 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:07:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-07 01:07:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1323. [2021-11-07 01:07:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 1.5347957639939485) internal successors, (2029), 1322 states have internal predecessors, (2029), 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) [2021-11-07 01:07:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 2029 transitions. [2021-11-07 01:07:33,464 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 2029 transitions. Word has length 129 [2021-11-07 01:07:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:33,464 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 2029 transitions. [2021-11-07 01:07:33,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 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) [2021-11-07 01:07:33,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 2029 transitions. [2021-11-07 01:07:33,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-07 01:07:33,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:33,467 INFO L513 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] [2021-11-07 01:07:33,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 01:07:33,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:07:33,690 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:07:33,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:33,690 INFO L85 PathProgramCache]: Analyzing trace with hash -318285981, now seen corresponding path program 1 times [2021-11-07 01:07:33,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:07:33,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345252942] [2021-11-07 01:07:33,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:33,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:07:33,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:07:33,692 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:07:33,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:07:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:35,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:07:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:35,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:35,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:35,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:35,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:35,762 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-07 01:07:35,763 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 [2021-11-07 01:07:35,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:35,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:35,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:36,098 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:07:36,098 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 [2021-11-07 01:07:37,266 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:07:37,267 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 [2021-11-07 01:07:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:07:37,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:07:38,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:38,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345252942] [2021-11-07 01:07:38,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345252942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:38,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:38,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-07 01:07:38,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823499409] [2021-11-07 01:07:38,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:07:38,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:38,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:07:38,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:07:38,193 INFO L87 Difference]: Start difference. First operand 1323 states and 2029 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-11-07 01:07:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:53,959 INFO L93 Difference]: Finished difference Result 2734 states and 4188 transitions. [2021-11-07 01:07:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:07:53,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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 129 [2021-11-07 01:07:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:53,966 INFO L225 Difference]: With dead ends: 2734 [2021-11-07 01:07:53,966 INFO L226 Difference]: Without dead ends: 1434 [2021-11-07 01:07:53,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 250 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:07:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-11-07 01:07:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1395. [2021-11-07 01:07:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 1.5286944045911048) internal successors, (2131), 1394 states have internal predecessors, (2131), 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) [2021-11-07 01:07:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2131 transitions. [2021-11-07 01:07:54,016 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2131 transitions. Word has length 129 [2021-11-07 01:07:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:54,016 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 2131 transitions. [2021-11-07 01:07:54,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-11-07 01:07:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2131 transitions. [2021-11-07 01:07:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 01:07:54,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:54,019 INFO L513 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, 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] [2021-11-07 01:07:54,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:07:54,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:07:54,235 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:07:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1658101417, now seen corresponding path program 1 times [2021-11-07 01:07:54,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:07:54,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741714183] [2021-11-07 01:07:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:54,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:07:54,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:07:54,256 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:07:54,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_534cf765-a772-4b0e-b5c6-720d5492377d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:07:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:56,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:07:56,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:56,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:56,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:56,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:56,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:56,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:56,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:56,617 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:07:56,617 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 [2021-11-07 01:07:56,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:56,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:56,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:57,016 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:07:57,017 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 [2021-11-07 01:07:58,563 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:07:58,564 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 [2021-11-07 01:07:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 01:07:58,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 01:07:59,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:59,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741714183] [2021-11-07 01:07:59,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741714183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:59,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:59,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:07:59,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522740644] [2021-11-07 01:07:59,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:07:59,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:59,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:07:59,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:07:59,233 INFO L87 Difference]: Start difference. First operand 1395 states and 2131 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)