./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 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/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_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs --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-0f8a17c [2021-11-19 14:32:07,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:32:07,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:32:07,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:32:07,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:32:07,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:32:07,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:32:07,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:32:07,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:32:07,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:32:07,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:32:07,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:32:07,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:32:07,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:32:07,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:32:07,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:32:07,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:32:07,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:32:07,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:32:07,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:32:07,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:32:07,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:32:07,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:32:07,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:32:07,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:32:07,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:32:07,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:32:07,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:32:07,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:32:07,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:32:07,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:32:07,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:32:07,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:32:07,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:32:07,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:32:07,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:32:07,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:32:07,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:32:07,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:32:07,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:32:07,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:32:07,373 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:32:07,406 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:32:07,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:32:07,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:32:07,408 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:32:07,408 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:32:07,409 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:32:07,409 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:32:07,409 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:32:07,410 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:32:07,410 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:32:07,410 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:32:07,410 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:32:07,411 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:32:07,411 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:32:07,411 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:32:07,412 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:32:07,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:32:07,413 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:32:07,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:32:07,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:32:07,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:32:07,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:32:07,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:32:07,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:32:07,415 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:32:07,415 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:32:07,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:32:07,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:32:07,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:32:07,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:32:07,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:32:07,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:32:07,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:32:07,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:32:07,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:32:07,418 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:32:07,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:32:07,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:32:07,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:32:07,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:32:07,420 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_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2021-11-19 14:32:07,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:32:07,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:32:07,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:32:07,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:32:07,770 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:32:07,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-19 14:32:07,900 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/data/09cd00651/1fce1b2768814ae18e5a47dd8268da1a/FLAGce5519967 [2021-11-19 14:32:08,766 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:32:08,767 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-19 14:32:08,816 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/data/09cd00651/1fce1b2768814ae18e5a47dd8268da1a/FLAGce5519967 [2021-11-19 14:32:08,867 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/data/09cd00651/1fce1b2768814ae18e5a47dd8268da1a [2021-11-19 14:32:08,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:32:08,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:32:08,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:32:08,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:32:08,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:32:08,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:32:08" (1/1) ... [2021-11-19 14:32:08,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd2c23d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:08, skipping insertion in model container [2021-11-19 14:32:08,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:32:08" (1/1) ... [2021-11-19 14:32:08,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:32:09,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:32:09,617 WARN L230 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_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-19 14:32:09,630 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:32:09,650 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) [2021-11-19 14:32:09,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c45aa82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:09, skipping insertion in model container [2021-11-19 14:32:09,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:32:09,652 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:32:09,654 INFO L158 Benchmark]: Toolchain (without parser) took 777.64ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 55.3MB in the beginning and 80.0MB in the end (delta: -24.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:32:09,655 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 90.2MB. Free memory was 45.2MB in the beginning and 45.1MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:32:09,657 INFO L158 Benchmark]: CACSL2BoogieTranslator took 770.96ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 55.1MB in the beginning and 80.0MB in the end (delta: -24.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:32:09,660 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 90.2MB. Free memory was 45.2MB in the beginning and 45.1MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 770.96ms. Allocated memory was 90.2MB in the beginning and 115.3MB in the end (delta: 25.2MB). Free memory was 55.1MB in the beginning and 80.0MB in the end (delta: -24.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/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_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs --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-0f8a17c [2021-11-19 14:32:12,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:32:12,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:32:12,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:32:12,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:32:12,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:32:12,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:32:12,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:32:12,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:32:12,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:32:12,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:32:12,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:32:12,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:32:12,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:32:12,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:32:12,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:32:12,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:32:12,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:32:12,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:32:12,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:32:12,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:32:12,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:32:12,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:32:12,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:32:12,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:32:12,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:32:12,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:32:12,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:32:12,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:32:12,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:32:12,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:32:12,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:32:12,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:32:12,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:32:12,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:32:12,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:32:12,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:32:12,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:32:12,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:32:12,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:32:12,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:32:12,830 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:32:12,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:32:12,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:32:12,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:32:12,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:32:12,900 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:32:12,900 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:32:12,901 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:32:12,901 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:32:12,902 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:32:12,903 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:32:12,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:32:12,906 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:32:12,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:32:12,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:32:12,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:32:12,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:32:12,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:32:12,908 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:32:12,908 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:32:12,909 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:32:12,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:32:12,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:32:12,910 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:32:12,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:32:12,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:32:12,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:32:12,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:32:12,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:32:12,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:32:12,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:32:12,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:32:12,912 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:32:12,913 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:32:12,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:32:12,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:32:12,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:32:12,914 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_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2021-11-19 14:32:13,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:32:13,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:32:13,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:32:13,456 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:32:13,460 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:32:13,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-19 14:32:13,558 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/data/57048f219/207bef47a4d448f9a1004a6e0dbb5804/FLAG2543ffde0 [2021-11-19 14:32:14,526 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:32:14,532 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-19 14:32:14,576 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/data/57048f219/207bef47a4d448f9a1004a6e0dbb5804/FLAG2543ffde0 [2021-11-19 14:32:14,634 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/data/57048f219/207bef47a4d448f9a1004a6e0dbb5804 [2021-11-19 14:32:14,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:32:14,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:32:14,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:32:14,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:32:14,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:32:14,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:32:14" (1/1) ... [2021-11-19 14:32:14,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e491a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:14, skipping insertion in model container [2021-11-19 14:32:14,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:32:14" (1/1) ... [2021-11-19 14:32:14,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:32:14,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:32:15,398 WARN L230 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_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-19 14:32:15,432 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:32:15,455 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:32:15,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:32:15,648 WARN L230 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_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-19 14:32:15,659 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:32:15,674 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:32:15,892 WARN L230 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_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-19 14:32:15,895 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:32:15,940 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:32:15,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15 WrapperNode [2021-11-19 14:32:15,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:32:15,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:32:15,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:32:15,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:32:15,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15" (1/1) ... [2021-11-19 14:32:16,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15" (1/1) ... [2021-11-19 14:32:16,120 INFO L137 Inliner]: procedures = 36, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 778 [2021-11-19 14:32:16,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:32:16,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:32:16,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:32:16,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:32:16,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15" (1/1) ... [2021-11-19 14:32:16,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15" (1/1) ... [2021-11-19 14:32:16,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15" (1/1) ... [2021-11-19 14:32:16,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15" (1/1) ... [2021-11-19 14:32:16,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15" (1/1) ... [2021-11-19 14:32:16,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15" (1/1) ... [2021-11-19 14:32:16,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15" (1/1) ... [2021-11-19 14:32:16,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:32:16,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:32:16,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:32:16,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:32:16,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15" (1/1) ... [2021-11-19 14:32:16,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:32:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:32:16,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:32:16,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:32:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:32:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:32:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:32:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:32:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:32:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:32:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:32:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:32:16,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:32:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:32:16,711 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:32:16,713 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:32:16,736 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:32:29,343 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 14:32:29,343 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 14:32:29,344 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:32:29,360 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:32:29,361 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:32:29,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:32:29 BoogieIcfgContainer [2021-11-19 14:32:29,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:32:29,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:32:29,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:32:29,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:32:29,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:32:14" (1/3) ... [2021-11-19 14:32:29,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da82cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:32:29, skipping insertion in model container [2021-11-19 14:32:29,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:32:15" (2/3) ... [2021-11-19 14:32:29,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da82cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:32:29, skipping insertion in model container [2021-11-19 14:32:29,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:32:29" (3/3) ... [2021-11-19 14:32:29,375 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-1.c [2021-11-19 14:32:29,382 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:32:29,382 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:32:29,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:32:29,455 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 [2021-11-19 14:32:29,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:32:29,479 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) [2021-11-19 14:32:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 14:32:29,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:29,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:29,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1590777092, now seen corresponding path program 1 times [2021-11-19 14:32:29,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:29,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232198861] [2021-11-19 14:32:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:29,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:29,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:29,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:29,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:32:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:30,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:32:30,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:30,251 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 [2021-11-19 14:32:30,271 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 [2021-11-19 14:32:30,479 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:30,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 14:32:30,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:30,509 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 14:32:30,532 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 [2021-11-19 14:32:31,257 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-19 14:32:31,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 1289 treesize of output 1241 [2021-11-19 14:32:31,493 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:31,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 14:32:31,506 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:31,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 14:32:31,537 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 [2021-11-19 14:32:31,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:31,752 INFO L244 Elim1Store]: Index analysis took 117 ms [2021-11-19 14:32:31,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-19 14:32:31,978 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-19 14:32:31,978 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 [2021-11-19 14:32:31,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:32,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:32,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:32,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:32,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:32,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:32,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:32,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:32,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:32,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:32,026 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 [2021-11-19 14:32:32,085 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 [2021-11-19 14:32:32,092 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 [2021-11-19 14:32:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:32:32,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:32,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:32,585 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-19 14:32:32,593 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:32,596 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-19 14:32:32,801 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:32,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 14:32:32,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:32,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-19 14:32:32,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:32,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-19 14:32:32,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:32,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-19 14:32:32,921 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:32,927 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-19 14:32:32,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:32:32,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-19 14:32:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:32:33,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:33,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232198861] [2021-11-19 14:32:33,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232198861] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:33,697 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:33,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:32:33,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053228984] [2021-11-19 14:32:33,700 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:33,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:32:33,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:33,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:32:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:32:33,747 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) [2021-11-19 14:32:35,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:37,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:47,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:49,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:52,512 INFO L93 Difference]: Finished difference Result 317 states and 539 transitions. [2021-11-19 14:32:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:32:52,517 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 [2021-11-19 14:32:52,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:52,532 INFO L225 Difference]: With dead ends: 317 [2021-11-19 14:32:52,532 INFO L226 Difference]: Without dead ends: 145 [2021-11-19 14:32:52,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:32:52,544 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 18 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:52,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1355 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 3 Unknown, 62 Unchecked, 18.6s Time] [2021-11-19 14:32:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-19 14:32:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-19 14:32:52,626 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) [2021-11-19 14:32:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 225 transitions. [2021-11-19 14:32:52,638 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 225 transitions. Word has length 45 [2021-11-19 14:32:52,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:52,639 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 225 transitions. [2021-11-19 14:32:52,639 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) [2021-11-19 14:32:52,639 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 225 transitions. [2021-11-19 14:32:52,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 14:32:52,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:52,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:52,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:52,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:52,870 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:52,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:52,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1806796926, now seen corresponding path program 1 times [2021-11-19 14:32:52,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:52,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797927510] [2021-11-19 14:32:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:52,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:52,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:52,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:52,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:32:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:53,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:32:53,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:53,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:53,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:53,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:53,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:53,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:54,019 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:32:54,020 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 [2021-11-19 14:32:57,728 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:32:57,729 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 [2021-11-19 14:33:06,096 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:33:06,097 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 [2021-11-19 14:33:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:06,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:14,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:14,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797927510] [2021-11-19 14:33:14,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797927510] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:14,579 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:14,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-19 14:33:14,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847129468] [2021-11-19 14:33:14,580 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:14,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:33:14,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:14,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:33:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-19 14:33:14,583 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) [2021-11-19 14:33:16,617 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:18,046 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:21,041 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:23,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:24,130 INFO L93 Difference]: Finished difference Result 295 states and 461 transitions. [2021-11-19 14:33:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:33:24,137 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 [2021-11-19 14:33:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:24,139 INFO L225 Difference]: With dead ends: 295 [2021-11-19 14:33:24,139 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 14:33:24,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-19 14:33:24,142 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 38 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:24,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 534 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 2 Unknown, 18 Unchecked, 9.5s Time] [2021-11-19 14:33:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 14:33:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2021-11-19 14:33:24,158 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) [2021-11-19 14:33:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 244 transitions. [2021-11-19 14:33:24,160 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 244 transitions. Word has length 45 [2021-11-19 14:33:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:24,160 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 244 transitions. [2021-11-19 14:33:24,161 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) [2021-11-19 14:33:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 244 transitions. [2021-11-19 14:33:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 14:33:24,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:24,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:24,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:24,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:24,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash 774668882, now seen corresponding path program 1 times [2021-11-19 14:33:24,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:24,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89800805] [2021-11-19 14:33:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:24,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:24,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:24,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:24,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:33:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:33:25,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:25,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:25,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:25,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:25,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:25,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:25,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:33:25,524 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:33:25,525 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 [2021-11-19 14:33:29,028 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:33:29,028 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 [2021-11-19 14:33:36,663 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:33:36,663 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 [2021-11-19 14:33:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:36,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:37,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:37,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89800805] [2021-11-19 14:33:37,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89800805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:37,207 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:37,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:33:37,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983007939] [2021-11-19 14:33:37,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:37,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:33:37,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:37,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:33:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:33:37,215 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) [2021-11-19 14:33:39,247 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:43,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:43,760 INFO L93 Difference]: Finished difference Result 311 states and 487 transitions. [2021-11-19 14:33:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:33:43,762 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 [2021-11-19 14:33:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:43,764 INFO L225 Difference]: With dead ends: 311 [2021-11-19 14:33:43,764 INFO L226 Difference]: Without dead ends: 176 [2021-11-19 14:33:43,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:33:43,767 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 38 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:43,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 902 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 96 Invalid, 1 Unknown, 106 Unchecked, 6.5s Time] [2021-11-19 14:33:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-19 14:33:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2021-11-19 14:33:43,783 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) [2021-11-19 14:33:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 269 transitions. [2021-11-19 14:33:43,785 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 269 transitions. Word has length 58 [2021-11-19 14:33:43,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:43,785 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 269 transitions. [2021-11-19 14:33:43,786 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) [2021-11-19 14:33:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 269 transitions. [2021-11-19 14:33:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 14:33:43,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:43,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:43,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:43,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:43,995 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash -713896793, now seen corresponding path program 1 times [2021-11-19 14:33:43,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:43,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843260293] [2021-11-19 14:33:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:43,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:43,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:44,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:33:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:44,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:33:44,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:44,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:44,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:44,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:44,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:44,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:33:45,134 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:33:45,134 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 [2021-11-19 14:33:48,652 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:33:48,653 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 [2021-11-19 14:33:55,465 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:33:55,466 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 [2021-11-19 14:33:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:55,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:56,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:56,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843260293] [2021-11-19 14:33:56,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843260293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:56,016 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:56,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:33:56,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106431786] [2021-11-19 14:33:56,016 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:56,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:33:56,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:56,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:33:56,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:33:56,018 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) [2021-11-19 14:33:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:56,539 INFO L93 Difference]: Finished difference Result 323 states and 507 transitions. [2021-11-19 14:33:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:33:56,540 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 [2021-11-19 14:33:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:56,543 INFO L225 Difference]: With dead ends: 323 [2021-11-19 14:33:56,543 INFO L226 Difference]: Without dead ends: 172 [2021-11-19 14:33:56,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:33:56,552 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 10 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:56,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 676 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 101 Unchecked, 0.5s Time] [2021-11-19 14:33:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-19 14:33:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-11-19 14:33:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.567251461988304) internal successors, (268), 171 states have internal predecessors, (268), 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) [2021-11-19 14:33:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 268 transitions. [2021-11-19 14:33:56,594 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 268 transitions. Word has length 59 [2021-11-19 14:33:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:56,595 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 268 transitions. [2021-11-19 14:33:56,595 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) [2021-11-19 14:33:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 268 transitions. [2021-11-19 14:33:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 14:33:56,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:56,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:56,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:56,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:56,812 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:56,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:56,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1173006651, now seen corresponding path program 1 times [2021-11-19 14:33:56,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:56,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224371890] [2021-11-19 14:33:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:56,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:56,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:56,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:56,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:33:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:57,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:33:57,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:57,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:57,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:57,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:57,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:33:57,932 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:33:57,933 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 [2021-11-19 14:34:01,572 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:34:01,573 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 [2021-11-19 14:34:08,470 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:34:08,470 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 [2021-11-19 14:34:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:08,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:08,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:08,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224371890] [2021-11-19 14:34:08,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224371890] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:08,997 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:08,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:34:08,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313401060] [2021-11-19 14:34:08,998 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:08,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:34:08,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:08,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:34:08,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:09,000 INFO L87 Difference]: Start difference. First operand 172 states and 268 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) [2021-11-19 14:34:11,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:15,672 INFO L93 Difference]: Finished difference Result 358 states and 558 transitions. [2021-11-19 14:34:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:34:15,675 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 [2021-11-19 14:34:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:15,677 INFO L225 Difference]: With dead ends: 358 [2021-11-19 14:34:15,677 INFO L226 Difference]: Without dead ends: 207 [2021-11-19 14:34:15,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:15,678 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 28 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:15,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1012 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 124 Invalid, 1 Unknown, 219 Unchecked, 6.6s Time] [2021-11-19 14:34:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-19 14:34:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2021-11-19 14:34:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.5538461538461539) internal successors, (303), 195 states have internal predecessors, (303), 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) [2021-11-19 14:34:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 303 transitions. [2021-11-19 14:34:15,692 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 303 transitions. Word has length 59 [2021-11-19 14:34:15,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:15,693 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 303 transitions. [2021-11-19 14:34:15,693 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) [2021-11-19 14:34:15,693 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 303 transitions. [2021-11-19 14:34:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 14:34:15,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:15,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:15,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 14:34:15,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:15,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash 320889874, now seen corresponding path program 1 times [2021-11-19 14:34:15,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:15,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264468704] [2021-11-19 14:34:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:15,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:15,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:15,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:15,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:34:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:16,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:16,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:16,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:16,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:16,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:16,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:16,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:16,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:16,825 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:34:16,825 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 [2021-11-19 14:34:20,355 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:34:20,359 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 [2021-11-19 14:34:28,013 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:34:28,014 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 [2021-11-19 14:34:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:28,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:28,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:28,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264468704] [2021-11-19 14:34:28,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264468704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:28,590 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:28,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:34:28,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400983946] [2021-11-19 14:34:28,590 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:28,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:34:28,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:28,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:34:28,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:28,592 INFO L87 Difference]: Start difference. First operand 196 states and 303 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) [2021-11-19 14:34:30,617 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:34,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:35,285 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:35,346 INFO L93 Difference]: Finished difference Result 382 states and 594 transitions. [2021-11-19 14:34:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:34:35,350 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 [2021-11-19 14:34:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:35,352 INFO L225 Difference]: With dead ends: 382 [2021-11-19 14:34:35,352 INFO L226 Difference]: Without dead ends: 207 [2021-11-19 14:34:35,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:35,353 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 46 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:35,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 738 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 95 Invalid, 1 Unknown, 47 Unchecked, 6.7s Time] [2021-11-19 14:34:35,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-19 14:34:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 202. [2021-11-19 14:34:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.5572139303482586) internal successors, (313), 201 states have internal predecessors, (313), 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) [2021-11-19 14:34:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 313 transitions. [2021-11-19 14:34:35,367 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 313 transitions. Word has length 59 [2021-11-19 14:34:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:35,368 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 313 transitions. [2021-11-19 14:34:35,368 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) [2021-11-19 14:34:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 313 transitions. [2021-11-19 14:34:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 14:34:35,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:35,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:35,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:35,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:35,587 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:35,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:35,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1682330414, now seen corresponding path program 1 times [2021-11-19 14:34:35,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:35,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996066025] [2021-11-19 14:34:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:35,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:35,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:35,589 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:35,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:34:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:36,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:36,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:36,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:36,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:36,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:36,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:36,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:36,629 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:34:36,629 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 [2021-11-19 14:34:40,112 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:34:40,113 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 [2021-11-19 14:34:47,670 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:34:47,671 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 [2021-11-19 14:34:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:47,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:48,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:48,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996066025] [2021-11-19 14:34:48,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996066025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:48,159 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:48,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:34:48,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821694827] [2021-11-19 14:34:48,159 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:48,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:34:48,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:34:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:48,161 INFO L87 Difference]: Start difference. First operand 202 states and 313 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) [2021-11-19 14:34:50,183 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:53,147 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:57,134 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:58,284 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:58,319 INFO L93 Difference]: Finished difference Result 388 states and 603 transitions. [2021-11-19 14:34:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:34:58,320 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 [2021-11-19 14:34:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:58,322 INFO L225 Difference]: With dead ends: 388 [2021-11-19 14:34:58,323 INFO L226 Difference]: Without dead ends: 207 [2021-11-19 14:34:58,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:58,324 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 35 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:58,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 840 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 103 Invalid, 1 Unknown, 115 Unchecked, 10.1s Time] [2021-11-19 14:34:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-19 14:34:58,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 202. [2021-11-19 14:34:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.5472636815920398) internal successors, (311), 201 states have internal predecessors, (311), 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) [2021-11-19 14:34:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 311 transitions. [2021-11-19 14:34:58,338 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 311 transitions. Word has length 59 [2021-11-19 14:34:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:58,338 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 311 transitions. [2021-11-19 14:34:58,338 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) [2021-11-19 14:34:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 311 transitions. [2021-11-19 14:34:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:34:58,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:58,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:58,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:58,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:58,551 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:58,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1666972293, now seen corresponding path program 1 times [2021-11-19 14:34:58,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:58,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909929158] [2021-11-19 14:34:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:58,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:58,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:58,555 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:58,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:34:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:59,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:59,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:59,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:59,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:59,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:59,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:59,536 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:34:59,536 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 [2021-11-19 14:35:02,988 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:35:02,988 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 [2021-11-19 14:35:10,055 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:35:10,057 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 [2021-11-19 14:35:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:35:10,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:35:10,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:10,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909929158] [2021-11-19 14:35:10,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909929158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:10,678 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:35:10,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:35:10,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720964538] [2021-11-19 14:35:10,678 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:10,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:35:10,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:10,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:35:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:35:10,684 INFO L87 Difference]: Start difference. First operand 202 states and 311 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) [2021-11-19 14:35:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:11,164 INFO L93 Difference]: Finished difference Result 393 states and 608 transitions. [2021-11-19 14:35:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:35:11,167 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 [2021-11-19 14:35:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:11,169 INFO L225 Difference]: With dead ends: 393 [2021-11-19 14:35:11,169 INFO L226 Difference]: Without dead ends: 212 [2021-11-19 14:35:11,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:35:11,171 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 6 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:11,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 682 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 102 Unchecked, 0.5s Time] [2021-11-19 14:35:11,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-19 14:35:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-19 14:35:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.5308056872037914) internal successors, (323), 211 states have internal predecessors, (323), 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) [2021-11-19 14:35:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 323 transitions. [2021-11-19 14:35:11,186 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 323 transitions. Word has length 60 [2021-11-19 14:35:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:11,186 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 323 transitions. [2021-11-19 14:35:11,187 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) [2021-11-19 14:35:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 323 transitions. [2021-11-19 14:35:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:35:11,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:11,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:11,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:11,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:11,403 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:11,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1626297543, now seen corresponding path program 1 times [2021-11-19 14:35:11,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:11,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973469938] [2021-11-19 14:35:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:11,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:11,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:11,406 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:11,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:35:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:11,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:35:11,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:35:11,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:35:12,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:12,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973469938] [2021-11-19 14:35:12,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973469938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:12,147 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:35:12,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:35:12,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607602331] [2021-11-19 14:35:12,148 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:12,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:35:12,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:12,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:35:12,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:35:12,149 INFO L87 Difference]: Start difference. First operand 212 states and 323 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-11-19 14:35:12,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:12,248 INFO L93 Difference]: Finished difference Result 753 states and 1167 transitions. [2021-11-19 14:35:12,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:35:12,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 [2021-11-19 14:35:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:12,254 INFO L225 Difference]: With dead ends: 753 [2021-11-19 14:35:12,254 INFO L226 Difference]: Without dead ends: 572 [2021-11-19 14:35:12,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:35:12,256 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 405 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:12,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 889 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:35:12,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-19 14:35:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 393. [2021-11-19 14:35:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.5331632653061225) internal successors, (601), 392 states have internal predecessors, (601), 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) [2021-11-19 14:35:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 601 transitions. [2021-11-19 14:35:12,283 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 601 transitions. Word has length 60 [2021-11-19 14:35:12,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:12,283 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 601 transitions. [2021-11-19 14:35:12,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-19 14:35:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 601 transitions. [2021-11-19 14:35:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:35:12,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:12,286 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:12,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:12,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:12,503 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:12,504 INFO L85 PathProgramCache]: Analyzing trace with hash -732811205, now seen corresponding path program 1 times [2021-11-19 14:35:12,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:12,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456967700] [2021-11-19 14:35:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:12,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:12,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:12,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:12,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:35:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:13,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:35:13,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:13,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:13,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:13,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:13,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:13,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:13,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:13,674 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:35:13,675 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 [2021-11-19 14:35:17,143 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:35:17,143 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 [2021-11-19 14:35:24,201 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:35:24,202 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 [2021-11-19 14:35:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:35:24,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:35:24,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:24,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456967700] [2021-11-19 14:35:24,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456967700] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:24,717 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:35:24,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:35:24,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071551254] [2021-11-19 14:35:24,718 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:24,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:35:24,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:24,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:35:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:35:24,720 INFO L87 Difference]: Start difference. First operand 393 states and 601 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) [2021-11-19 14:35:26,744 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:36,877 INFO L93 Difference]: Finished difference Result 773 states and 1186 transitions. [2021-11-19 14:35:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:35:36,880 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 [2021-11-19 14:35:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:36,885 INFO L225 Difference]: With dead ends: 773 [2021-11-19 14:35:36,886 INFO L226 Difference]: Without dead ends: 417 [2021-11-19 14:35:36,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-19 14:35:36,889 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 36 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:36,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 927 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 130 Invalid, 1 Unknown, 170 Unchecked, 7.9s Time] [2021-11-19 14:35:36,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-19 14:35:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 395. [2021-11-19 14:35:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.5228426395939085) internal successors, (600), 394 states have internal predecessors, (600), 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) [2021-11-19 14:35:36,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 600 transitions. [2021-11-19 14:35:36,918 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 600 transitions. Word has length 60 [2021-11-19 14:35:36,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:36,919 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 600 transitions. [2021-11-19 14:35:36,919 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) [2021-11-19 14:35:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 600 transitions. [2021-11-19 14:35:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 14:35:36,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:36,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:36,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:37,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:37,135 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:37,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1752756352, now seen corresponding path program 1 times [2021-11-19 14:35:37,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:37,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60239451] [2021-11-19 14:35:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:37,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:37,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:37,138 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:37,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:35:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:35:37,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:37,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:37,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:37,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:37,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:37,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:37,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:38,244 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:35:38,245 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 [2021-11-19 14:35:41,669 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:35:41,669 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 [2021-11-19 14:35:48,788 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:35:48,789 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 [2021-11-19 14:35:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:35:48,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:35:49,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:49,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60239451] [2021-11-19 14:35:49,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60239451] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:49,285 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:35:49,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:35:49,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727647434] [2021-11-19 14:35:49,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:49,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:35:49,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:35:49,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:35:49,288 INFO L87 Difference]: Start difference. First operand 395 states and 600 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) [2021-11-19 14:35:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:50,438 INFO L93 Difference]: Finished difference Result 753 states and 1154 transitions. [2021-11-19 14:35:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:35:50,439 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 [2021-11-19 14:35:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:50,442 INFO L225 Difference]: With dead ends: 753 [2021-11-19 14:35:50,442 INFO L226 Difference]: Without dead ends: 395 [2021-11-19 14:35:50,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:35:50,444 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 7 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:50,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1004 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 193 Unchecked, 1.1s Time] [2021-11-19 14:35:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-19 14:35:50,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2021-11-19 14:35:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.517766497461929) internal successors, (598), 394 states have internal predecessors, (598), 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) [2021-11-19 14:35:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 598 transitions. [2021-11-19 14:35:50,468 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 598 transitions. Word has length 61 [2021-11-19 14:35:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:50,468 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 598 transitions. [2021-11-19 14:35:50,469 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) [2021-11-19 14:35:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 598 transitions. [2021-11-19 14:35:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 14:35:50,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:50,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:50,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:50,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:50,692 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:50,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1654924640, now seen corresponding path program 1 times [2021-11-19 14:35:50,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:50,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045164016] [2021-11-19 14:35:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:50,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:50,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:50,696 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:50,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:35:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:51,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:35:51,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:51,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:51,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:51,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:51,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:51,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:51,776 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:35:51,776 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 [2021-11-19 14:35:55,202 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:35:55,202 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 [2021-11-19 14:36:02,352 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:36:02,352 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 [2021-11-19 14:36:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:36:02,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:36:02,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:02,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045164016] [2021-11-19 14:36:02,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045164016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:02,803 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:36:02,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:36:02,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67555012] [2021-11-19 14:36:02,804 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:02,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:36:02,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:36:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:36:02,805 INFO L87 Difference]: Start difference. First operand 395 states and 598 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) [2021-11-19 14:36:04,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:11,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:11,212 INFO L93 Difference]: Finished difference Result 775 states and 1179 transitions. [2021-11-19 14:36:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:36:11,215 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 [2021-11-19 14:36:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:11,218 INFO L225 Difference]: With dead ends: 775 [2021-11-19 14:36:11,219 INFO L226 Difference]: Without dead ends: 417 [2021-11-19 14:36:11,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:36:11,220 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 34 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:11,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 838 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 121 Invalid, 1 Unknown, 150 Unchecked, 8.4s Time] [2021-11-19 14:36:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-19 14:36:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 395. [2021-11-19 14:36:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.50253807106599) internal successors, (592), 394 states have internal predecessors, (592), 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) [2021-11-19 14:36:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 592 transitions. [2021-11-19 14:36:11,253 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 592 transitions. Word has length 62 [2021-11-19 14:36:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:11,253 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 592 transitions. [2021-11-19 14:36:11,254 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) [2021-11-19 14:36:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 592 transitions. [2021-11-19 14:36:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 14:36:11,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:11,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:11,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-19 14:36:11,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:11,467 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:11,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1043051208, now seen corresponding path program 1 times [2021-11-19 14:36:11,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:11,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134697300] [2021-11-19 14:36:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:11,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:11,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:11,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:11,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:36:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:11,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:36:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:11,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:11,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:11,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:11,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:11,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:11,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:12,383 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:36:12,383 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 56 treesize of output 74 [2021-11-19 14:36:13,636 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:36:13,637 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 [2021-11-19 14:36:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:36:13,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:36:14,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:14,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134697300] [2021-11-19 14:36:14,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134697300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:14,027 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:36:14,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:36:14,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850785420] [2021-11-19 14:36:14,028 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:14,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:36:14,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:14,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:36:14,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:36:14,029 INFO L87 Difference]: Start difference. First operand 395 states and 592 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) [2021-11-19 14:36:16,056 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:18,073 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:25,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:26,506 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:30,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:33,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:35,185 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:36,537 INFO L93 Difference]: Finished difference Result 832 states and 1252 transitions. [2021-11-19 14:36:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:36:36,540 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 [2021-11-19 14:36:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:36,543 INFO L225 Difference]: With dead ends: 832 [2021-11-19 14:36:36,543 INFO L226 Difference]: Without dead ends: 474 [2021-11-19 14:36:36,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:36:36,545 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 28 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 8 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:36,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 668 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 256 Invalid, 4 Unknown, 0 Unchecked, 22.4s Time] [2021-11-19 14:36:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-19 14:36:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 438. [2021-11-19 14:36:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.494279176201373) internal successors, (653), 437 states have internal predecessors, (653), 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) [2021-11-19 14:36:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 653 transitions. [2021-11-19 14:36:36,583 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 653 transitions. Word has length 62 [2021-11-19 14:36:36,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:36,584 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 653 transitions. [2021-11-19 14:36:36,584 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) [2021-11-19 14:36:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 653 transitions. [2021-11-19 14:36:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 14:36:36,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:36,586 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:36,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:36,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:36,803 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1018679951, now seen corresponding path program 1 times [2021-11-19 14:36:36,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:36,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628947807] [2021-11-19 14:36:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:36,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:36,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:36,806 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:36,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:36:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:37,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:36:37,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:37,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:37,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:37,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:37,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:37,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:37,999 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:36:38,000 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 [2021-11-19 14:36:38,462 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:36:38,462 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 [2021-11-19 14:36:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:36:38,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:36:38,890 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:38,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628947807] [2021-11-19 14:36:38,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628947807] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:38,890 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:36:38,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:36:38,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314030172] [2021-11-19 14:36:38,891 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:38,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:36:38,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:36:38,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:36:38,892 INFO L87 Difference]: Start difference. First operand 438 states and 653 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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) [2021-11-19 14:36:40,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:46,072 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:49,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:50,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:53,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:56,691 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:59,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:01,062 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:05,677 INFO L93 Difference]: Finished difference Result 1081 states and 1637 transitions. [2021-11-19 14:37:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:37:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-19 14:37:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:05,682 INFO L225 Difference]: With dead ends: 1081 [2021-11-19 14:37:05,682 INFO L226 Difference]: Without dead ends: 680 [2021-11-19 14:37:05,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:37:05,685 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 200 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:05,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 519 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 376 Invalid, 1 Unknown, 0 Unchecked, 26.6s Time] [2021-11-19 14:37:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-19 14:37:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 438. [2021-11-19 14:37:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.4759725400457666) internal successors, (645), 437 states have internal predecessors, (645), 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) [2021-11-19 14:37:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 645 transitions. [2021-11-19 14:37:05,713 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 645 transitions. Word has length 76 [2021-11-19 14:37:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:05,713 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 645 transitions. [2021-11-19 14:37:05,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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) [2021-11-19 14:37:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 645 transitions. [2021-11-19 14:37:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 14:37:05,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:05,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:05,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:05,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:05,935 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:05,935 INFO L85 PathProgramCache]: Analyzing trace with hash 913917642, now seen corresponding path program 1 times [2021-11-19 14:37:05,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:05,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67790649] [2021-11-19 14:37:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:05,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:05,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:05,937 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:05,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:37:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:06,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:37:06,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:06,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:06,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:06,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:06,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:06,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:06,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:06,931 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:37:06,932 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 [2021-11-19 14:37:07,571 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:37:07,572 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 [2021-11-19 14:37:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:37:07,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:37:08,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:08,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67790649] [2021-11-19 14:37:08,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67790649] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:08,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:08,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:37:08,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285835328] [2021-11-19 14:37:08,031 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:08,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:37:08,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:37:08,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:37:08,033 INFO L87 Difference]: Start difference. First operand 438 states and 645 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2021-11-19 14:37:10,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:12,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:19,446 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:24,856 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:28,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:31,854 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:32,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:33,364 INFO L93 Difference]: Finished difference Result 1023 states and 1537 transitions. [2021-11-19 14:37:33,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:37:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 78 [2021-11-19 14:37:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:33,369 INFO L225 Difference]: With dead ends: 1023 [2021-11-19 14:37:33,369 INFO L226 Difference]: Without dead ends: 622 [2021-11-19 14:37:33,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:37:33,371 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 155 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 50 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:33,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 548 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 353 Invalid, 2 Unknown, 0 Unchecked, 25.2s Time] [2021-11-19 14:37:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-19 14:37:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 440. [2021-11-19 14:37:33,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.4646924829157175) internal successors, (643), 439 states have internal predecessors, (643), 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) [2021-11-19 14:37:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 643 transitions. [2021-11-19 14:37:33,400 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 643 transitions. Word has length 78 [2021-11-19 14:37:33,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:33,401 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 643 transitions. [2021-11-19 14:37:33,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2021-11-19 14:37:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 643 transitions. [2021-11-19 14:37:33,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 14:37:33,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:33,403 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:33,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:33,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:33,618 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash -970686709, now seen corresponding path program 1 times [2021-11-19 14:37:33,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:33,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981253428] [2021-11-19 14:37:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:33,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:33,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:33,622 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:33,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:37:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:34,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:37:34,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:34,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:34,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:34,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:34,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:34,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:34,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:34,536 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:37:34,536 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 [2021-11-19 14:37:34,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:34,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:34,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:34,955 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:37:34,955 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 [2021-11-19 14:37:37,383 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:37:37,383 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 [2021-11-19 14:37:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:37:37,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:37:37,878 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:37,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981253428] [2021-11-19 14:37:37,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981253428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:37,878 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:37,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:37:37,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046215881] [2021-11-19 14:37:37,879 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:37,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:37:37,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:37,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:37:37,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:37:37,880 INFO L87 Difference]: Start difference. First operand 440 states and 643 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) [2021-11-19 14:37:39,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:41,922 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:52,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:54,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:55,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:01,571 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:03,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:05,951 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:10,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:11,801 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:13,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:16,545 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:17,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:20,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:23,273 INFO L93 Difference]: Finished difference Result 1314 states and 1962 transitions. [2021-11-19 14:38:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:38:23,275 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 [2021-11-19 14:38:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:23,281 INFO L225 Difference]: With dead ends: 1314 [2021-11-19 14:38:23,281 INFO L226 Difference]: Without dead ends: 911 [2021-11-19 14:38:23,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:38:23,283 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 257 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 73 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:23,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 728 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 525 Invalid, 3 Unknown, 0 Unchecked, 45.2s Time] [2021-11-19 14:38:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-11-19 14:38:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 546. [2021-11-19 14:38:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 1.4880733944954128) internal successors, (811), 545 states have internal predecessors, (811), 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) [2021-11-19 14:38:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 811 transitions. [2021-11-19 14:38:23,320 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 811 transitions. Word has length 84 [2021-11-19 14:38:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:23,321 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 811 transitions. [2021-11-19 14:38:23,321 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) [2021-11-19 14:38:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 811 transitions. [2021-11-19 14:38:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:38:23,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:23,323 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:38:23,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:23,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:38:23,539 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:38:23,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:23,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1086434060, now seen corresponding path program 1 times [2021-11-19 14:38:23,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:23,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030704477] [2021-11-19 14:38:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:23,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:23,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:23,541 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:23,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:38:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:24,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:38:24,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:24,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:24,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:24,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:24,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:24,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:24,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:24,291 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:38:24,291 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 [2021-11-19 14:38:24,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:24,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:24,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:24,708 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:38:24,708 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 [2021-11-19 14:38:27,226 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:38:27,226 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 [2021-11-19 14:38:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:38:27,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:38:27,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:27,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030704477] [2021-11-19 14:38:27,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030704477] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:38:27,711 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:38:27,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:38:27,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127850258] [2021-11-19 14:38:27,712 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:27,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:38:27,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:38:27,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:38:27,713 INFO L87 Difference]: Start difference. First operand 546 states and 811 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) [2021-11-19 14:38:29,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:38,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:41,489 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:43,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:47,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:51,679 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:52,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:54,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:54,376 INFO L93 Difference]: Finished difference Result 1558 states and 2355 transitions. [2021-11-19 14:38:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:38:54,380 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 [2021-11-19 14:38:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:54,386 INFO L225 Difference]: With dead ends: 1558 [2021-11-19 14:38:54,386 INFO L226 Difference]: Without dead ends: 1049 [2021-11-19 14:38:54,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:38:54,388 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 327 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 75 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:54,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 624 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 410 Invalid, 3 Unknown, 0 Unchecked, 26.5s Time] [2021-11-19 14:38:54,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-11-19 14:38:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 702. [2021-11-19 14:38:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 1.5192582025677603) internal successors, (1065), 701 states have internal predecessors, (1065), 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) [2021-11-19 14:38:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1065 transitions. [2021-11-19 14:38:54,446 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1065 transitions. Word has length 85 [2021-11-19 14:38:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:54,446 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1065 transitions. [2021-11-19 14:38:54,447 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) [2021-11-19 14:38:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1065 transitions. [2021-11-19 14:38:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:38:54,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:54,450 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:38:54,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:54,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:38:54,667 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:38:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:54,667 INFO L85 PathProgramCache]: Analyzing trace with hash -386273483, now seen corresponding path program 1 times [2021-11-19 14:38:54,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:54,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782285664] [2021-11-19 14:38:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:54,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:54,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:54,669 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:54,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:38:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:38:55,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:55,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:55,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:55,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:55,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:55,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:55,567 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:38:55,567 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 [2021-11-19 14:38:55,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:55,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:55,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:56,037 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:38:56,038 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 [2021-11-19 14:38:57,819 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:38:57,820 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 [2021-11-19 14:38:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:38:57,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:38:58,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:58,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782285664] [2021-11-19 14:38:58,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782285664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:38:58,439 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:38:58,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:38:58,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086607217] [2021-11-19 14:38:58,442 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:58,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:38:58,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:58,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:38:58,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:38:58,444 INFO L87 Difference]: Start difference. First operand 702 states and 1065 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:00,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:11,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:17,210 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:18,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:19,910 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:24,165 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:26,680 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:29,078 INFO L93 Difference]: Finished difference Result 1837 states and 2820 transitions. [2021-11-19 14:39:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:39:29,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-19 14:39:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:29,086 INFO L225 Difference]: With dead ends: 1837 [2021-11-19 14:39:29,086 INFO L226 Difference]: Without dead ends: 1172 [2021-11-19 14:39:29,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:39:29,088 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 416 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:29,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 571 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 402 Invalid, 1 Unknown, 0 Unchecked, 30.5s Time] [2021-11-19 14:39:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-11-19 14:39:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 785. [2021-11-19 14:39:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 1.5255102040816326) internal successors, (1196), 784 states have internal predecessors, (1196), 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) [2021-11-19 14:39:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1196 transitions. [2021-11-19 14:39:29,151 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1196 transitions. Word has length 112 [2021-11-19 14:39:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:29,151 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1196 transitions. [2021-11-19 14:39:29,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1196 transitions. [2021-11-19 14:39:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:39:29,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:29,156 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:39:29,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:29,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:29,371 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:29,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:29,371 INFO L85 PathProgramCache]: Analyzing trace with hash 603764891, now seen corresponding path program 1 times [2021-11-19 14:39:29,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:29,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907880493] [2021-11-19 14:39:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:29,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:29,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:29,373 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:29,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:39:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:30,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:39:30,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:30,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:30,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:30,232 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:39:30,232 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 [2021-11-19 14:39:30,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:30,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:30,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:30,781 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:39:30,782 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 [2021-11-19 14:39:32,669 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:39:32,669 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 [2021-11-19 14:39:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:39:32,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:39:33,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:33,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907880493] [2021-11-19 14:39:33,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907880493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:33,289 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:33,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:39:33,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898409186] [2021-11-19 14:39:33,290 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:33,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:39:33,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:39:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:39:33,291 INFO L87 Difference]: Start difference. First operand 785 states and 1196 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:35,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:40,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:47,634 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:49,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:50,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:54,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:55,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:56,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:59,243 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:00,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:01,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:03,189 INFO L93 Difference]: Finished difference Result 1896 states and 2901 transitions. [2021-11-19 14:40:03,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:40:03,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-19 14:40:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:03,196 INFO L225 Difference]: With dead ends: 1896 [2021-11-19 14:40:03,196 INFO L226 Difference]: Without dead ends: 1148 [2021-11-19 14:40:03,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:03,198 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 407 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 81 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:03,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 595 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 399 Invalid, 3 Unknown, 0 Unchecked, 29.7s Time] [2021-11-19 14:40:03,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-11-19 14:40:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 787. [2021-11-19 14:40:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 1.5190839694656488) internal successors, (1194), 786 states have internal predecessors, (1194), 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) [2021-11-19 14:40:03,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1194 transitions. [2021-11-19 14:40:03,245 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1194 transitions. Word has length 113 [2021-11-19 14:40:03,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:03,245 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 1194 transitions. [2021-11-19 14:40:03,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:03,246 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1194 transitions. [2021-11-19 14:40:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:40:03,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:03,249 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:03,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:03,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:03,467 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:03,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:03,467 INFO L85 PathProgramCache]: Analyzing trace with hash -400637440, now seen corresponding path program 1 times [2021-11-19 14:40:03,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:03,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415070727] [2021-11-19 14:40:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:03,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:03,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:03,469 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:03,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:40:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:03,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:40:03,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:04,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:04,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:04,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:04,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:04,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:04,165 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:40:04,165 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 [2021-11-19 14:40:04,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:04,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:04,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:04,580 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:40:04,581 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 [2021-11-19 14:40:06,657 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:40:06,658 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 [2021-11-19 14:40:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:40:06,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:40:07,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:07,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415070727] [2021-11-19 14:40:07,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415070727] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:07,324 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:07,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:40:07,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187026565] [2021-11-19 14:40:07,324 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:07,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:40:07,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:07,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:40:07,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:40:07,325 INFO L87 Difference]: Start difference. First operand 787 states and 1194 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) [2021-11-19 14:40:09,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:21,756 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:29,996 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:30,655 INFO L93 Difference]: Finished difference Result 1949 states and 2979 transitions. [2021-11-19 14:40:30,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:40:30,657 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 [2021-11-19 14:40:30,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:30,664 INFO L225 Difference]: With dead ends: 1949 [2021-11-19 14:40:30,664 INFO L226 Difference]: Without dead ends: 1199 [2021-11-19 14:40:30,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:30,666 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 364 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:30,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 744 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 447 Invalid, 1 Unknown, 0 Unchecked, 23.2s Time] [2021-11-19 14:40:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-11-19 14:40:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 886. [2021-11-19 14:40:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.5197740112994351) internal successors, (1345), 885 states have internal predecessors, (1345), 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) [2021-11-19 14:40:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1345 transitions. [2021-11-19 14:40:30,718 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1345 transitions. Word has length 113 [2021-11-19 14:40:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:30,719 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1345 transitions. [2021-11-19 14:40:30,719 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) [2021-11-19 14:40:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1345 transitions. [2021-11-19 14:40:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:40:30,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:30,723 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:30,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:30,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:30,943 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:30,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1917048509, now seen corresponding path program 1 times [2021-11-19 14:40:30,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:30,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220550178] [2021-11-19 14:40:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:30,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:30,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:30,946 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:30,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:40:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:40:31,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:40:31,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:40:31,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:31,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220550178] [2021-11-19 14:40:31,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220550178] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:31,905 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:31,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:40:31,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63855569] [2021-11-19 14:40:31,906 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:31,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:40:31,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:40:31,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:40:31,907 INFO L87 Difference]: Start difference. First operand 886 states and 1345 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2021-11-19 14:40:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:32,725 INFO L93 Difference]: Finished difference Result 3356 states and 5143 transitions. [2021-11-19 14:40:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:40:32,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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 115 [2021-11-19 14:40:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:32,740 INFO L225 Difference]: With dead ends: 3356 [2021-11-19 14:40:32,740 INFO L226 Difference]: Without dead ends: 2507 [2021-11-19 14:40:32,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:40:32,743 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 327 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:32,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 611 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:40:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-11-19 14:40:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2491. [2021-11-19 14:40:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2490 states have (on average 1.5188755020080322) internal successors, (3782), 2490 states have internal predecessors, (3782), 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) [2021-11-19 14:40:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 3782 transitions. [2021-11-19 14:40:32,880 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 3782 transitions. Word has length 115 [2021-11-19 14:40:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:32,881 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 3782 transitions. [2021-11-19 14:40:32,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2021-11-19 14:40:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 3782 transitions. [2021-11-19 14:40:32,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:40:32,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:32,887 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:32,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:33,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:33,103 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:33,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:33,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1954272065, now seen corresponding path program 1 times [2021-11-19 14:40:33,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:33,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37849828] [2021-11-19 14:40:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:33,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:33,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:33,105 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:33,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:40:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:33,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:40:33,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:33,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:33,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:33,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:33,943 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:40:33,943 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 [2021-11-19 14:40:34,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:34,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:34,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:34,458 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:40:34,458 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 [2021-11-19 14:40:36,125 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:40:36,126 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 [2021-11-19 14:40:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:40:36,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:40:36,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:36,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37849828] [2021-11-19 14:40:36,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37849828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:36,744 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:36,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:40:36,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727096203] [2021-11-19 14:40:36,744 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:36,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:40:36,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:40:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:40:36,746 INFO L87 Difference]: Start difference. First operand 2491 states and 3782 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:38,767 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:52,084 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:53,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:58,620 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:01,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:03,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:07,227 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:07,492 INFO L93 Difference]: Finished difference Result 6305 states and 9544 transitions. [2021-11-19 14:41:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:41:07,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-19 14:41:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:07,511 INFO L225 Difference]: With dead ends: 6305 [2021-11-19 14:41:07,511 INFO L226 Difference]: Without dead ends: 3851 [2021-11-19 14:41:07,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:41:07,515 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 407 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 79 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:07,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 683 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 512 Invalid, 2 Unknown, 0 Unchecked, 30.5s Time] [2021-11-19 14:41:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-11-19 14:41:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2740. [2021-11-19 14:41:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2739 states have (on average 1.5096750638919314) internal successors, (4135), 2739 states have internal predecessors, (4135), 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) [2021-11-19 14:41:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 4135 transitions. [2021-11-19 14:41:07,688 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 4135 transitions. Word has length 115 [2021-11-19 14:41:07,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:07,688 INFO L470 AbstractCegarLoop]: Abstraction has 2740 states and 4135 transitions. [2021-11-19 14:41:07,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 4135 transitions. [2021-11-19 14:41:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:41:07,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:07,708 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:07,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:07,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:07,930 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:07,931 INFO L85 PathProgramCache]: Analyzing trace with hash -904487367, now seen corresponding path program 1 times [2021-11-19 14:41:07,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:07,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490665863] [2021-11-19 14:41:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:07,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:07,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:07,933 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:07,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:41:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:08,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:41:08,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:08,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:08,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:08,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:08,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:08,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:08,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:08,717 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:41:08,718 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 [2021-11-19 14:41:08,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:08,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:08,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:09,167 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:41:09,168 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 [2021-11-19 14:41:10,892 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:41:10,892 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 [2021-11-19 14:41:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:41:11,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:41:11,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:11,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490665863] [2021-11-19 14:41:11,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490665863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:11,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:11,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:41:11,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145291188] [2021-11-19 14:41:11,507 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:11,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:41:11,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:11,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:41:11,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:41:11,508 INFO L87 Difference]: Start difference. First operand 2740 states and 4135 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) [2021-11-19 14:41:13,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:27,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:33,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:35,769 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:38,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:42,428 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:44,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:46,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:48,684 INFO L93 Difference]: Finished difference Result 6410 states and 9623 transitions. [2021-11-19 14:41:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:41:48,685 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 116 [2021-11-19 14:41:48,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:48,703 INFO L225 Difference]: With dead ends: 6410 [2021-11-19 14:41:48,703 INFO L226 Difference]: Without dead ends: 3707 [2021-11-19 14:41:48,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:41:48,706 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 298 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 75 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:48,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 796 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 610 Invalid, 1 Unknown, 0 Unchecked, 36.9s Time] [2021-11-19 14:41:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2021-11-19 14:41:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 2740. [2021-11-19 14:41:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2739 states have (on average 1.4950711938663745) internal successors, (4095), 2739 states have internal predecessors, (4095), 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) [2021-11-19 14:41:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 4095 transitions. [2021-11-19 14:41:48,896 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 4095 transitions. Word has length 116 [2021-11-19 14:41:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:48,897 INFO L470 AbstractCegarLoop]: Abstraction has 2740 states and 4095 transitions. [2021-11-19 14:41:48,897 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) [2021-11-19 14:41:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 4095 transitions. [2021-11-19 14:41:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:41:48,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:48,903 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:48,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:49,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:49,119 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:49,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:49,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1972621621, now seen corresponding path program 1 times [2021-11-19 14:41:49,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:49,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710168897] [2021-11-19 14:41:49,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:49,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:49,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:49,121 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:49,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:41:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:49,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:41:49,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:49,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:49,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:49,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:49,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:49,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:49,884 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:41:49,884 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 [2021-11-19 14:41:49,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:49,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:49,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:50,317 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:41:50,317 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 [2021-11-19 14:41:52,640 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:41:52,641 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 [2021-11-19 14:41:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:41:52,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:41:53,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:53,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710168897] [2021-11-19 14:41:53,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710168897] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:53,278 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:53,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:41:53,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669961654] [2021-11-19 14:41:53,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:53,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:41:53,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:41:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:41:53,280 INFO L87 Difference]: Start difference. First operand 2740 states and 4095 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) [2021-11-19 14:41:55,302 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:02,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:15,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:17,253 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:19,296 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:21,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:24,094 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:25,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:28,026 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:30,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:42:30,950 INFO L93 Difference]: Finished difference Result 6647 states and 9888 transitions. [2021-11-19 14:42:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:42:30,952 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 [2021-11-19 14:42:30,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:42:30,972 INFO L225 Difference]: With dead ends: 6647 [2021-11-19 14:42:30,972 INFO L226 Difference]: Without dead ends: 3944 [2021-11-19 14:42:30,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:42:30,976 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 279 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:42:30,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 644 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 491 Invalid, 3 Unknown, 0 Unchecked, 37.4s Time] [2021-11-19 14:42:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3944 states. [2021-11-19 14:42:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3944 to 2983. [2021-11-19 14:42:31,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 1.4916163648558014) internal successors, (4448), 2982 states have internal predecessors, (4448), 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) [2021-11-19 14:42:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 4448 transitions. [2021-11-19 14:42:31,111 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 4448 transitions. Word has length 119 [2021-11-19 14:42:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:42:31,112 INFO L470 AbstractCegarLoop]: Abstraction has 2983 states and 4448 transitions. [2021-11-19 14:42:31,112 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) [2021-11-19 14:42:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 4448 transitions. [2021-11-19 14:42:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:42:31,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:42:31,117 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:42:31,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:42:31,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:42:31,330 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:42:31,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:42:31,330 INFO L85 PathProgramCache]: Analyzing trace with hash -796665206, now seen corresponding path program 1 times [2021-11-19 14:42:31,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:42:31,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304731057] [2021-11-19 14:42:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:31,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:42:31,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:42:31,332 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:42:31,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:42:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:32,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:42:32,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:32,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:32,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:32,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:32,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:32,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:32,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:32,188 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:42:32,188 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 [2021-11-19 14:42:32,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:32,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:32,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:32,609 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:42:32,610 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 [2021-11-19 14:42:35,038 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:42:35,038 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 [2021-11-19 14:42:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:42:35,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:42:35,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:42:35,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304731057] [2021-11-19 14:42:35,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304731057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:42:35,701 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:42:35,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:42:35,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511016075] [2021-11-19 14:42:35,702 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:42:35,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:42:35,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:42:35,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:42:35,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:42:35,702 INFO L87 Difference]: Start difference. First operand 2983 states and 4448 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) [2021-11-19 14:42:37,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:39,737 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:50,070 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:55,475 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:57,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:58,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:01,280 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:03,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:06,406 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:06,990 INFO L93 Difference]: Finished difference Result 6926 states and 10275 transitions. [2021-11-19 14:43:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:43:06,992 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 [2021-11-19 14:43:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:07,001 INFO L225 Difference]: With dead ends: 6926 [2021-11-19 14:43:07,001 INFO L226 Difference]: Without dead ends: 3980 [2021-11-19 14:43:07,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:43:07,005 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 288 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 73 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:07,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 697 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 516 Invalid, 4 Unknown, 0 Unchecked, 31.0s Time] [2021-11-19 14:43:07,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3980 states. [2021-11-19 14:43:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3980 to 3047. [2021-11-19 14:43:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 3046 states have (on average 1.4871963230466185) internal successors, (4530), 3046 states have internal predecessors, (4530), 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) [2021-11-19 14:43:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 4530 transitions. [2021-11-19 14:43:07,133 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 4530 transitions. Word has length 120 [2021-11-19 14:43:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:07,134 INFO L470 AbstractCegarLoop]: Abstraction has 3047 states and 4530 transitions. [2021-11-19 14:43:07,134 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) [2021-11-19 14:43:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 4530 transitions. [2021-11-19 14:43:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:43:07,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:07,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:07,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:07,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:43:07,337 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:07,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:07,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1259356732, now seen corresponding path program 1 times [2021-11-19 14:43:07,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:43:07,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598175113] [2021-11-19 14:43:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:07,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:43:07,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:43:07,340 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:43:07,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:43:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:07,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:43:07,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:43:07,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:43:08,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:43:08,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598175113] [2021-11-19 14:43:08,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598175113] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:08,191 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:08,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:43:08,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719052516] [2021-11-19 14:43:08,191 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:08,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:43:08,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:43:08,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:43:08,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:43:08,193 INFO L87 Difference]: Start difference. First operand 3047 states and 4530 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) [2021-11-19 14:43:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:08,862 INFO L93 Difference]: Finished difference Result 6110 states and 9089 transitions. [2021-11-19 14:43:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:43:08,862 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 [2021-11-19 14:43:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:08,876 INFO L225 Difference]: With dead ends: 6110 [2021-11-19 14:43:08,876 INFO L226 Difference]: Without dead ends: 3100 [2021-11-19 14:43:08,878 INFO L932 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 [2021-11-19 14:43:08,879 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 15 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:08,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 424 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:43:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-11-19 14:43:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 3100. [2021-11-19 14:43:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 3099 states have (on average 1.4833817360438852) internal successors, (4597), 3099 states have internal predecessors, (4597), 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) [2021-11-19 14:43:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4597 transitions. [2021-11-19 14:43:08,998 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4597 transitions. Word has length 127 [2021-11-19 14:43:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:08,998 INFO L470 AbstractCegarLoop]: Abstraction has 3100 states and 4597 transitions. [2021-11-19 14:43:08,998 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) [2021-11-19 14:43:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4597 transitions. [2021-11-19 14:43:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:43:09,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:09,001 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:09,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:09,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:43:09,202 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:09,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:09,202 INFO L85 PathProgramCache]: Analyzing trace with hash 636075130, now seen corresponding path program 1 times [2021-11-19 14:43:09,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:43:09,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595501083] [2021-11-19 14:43:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:09,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:43:09,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:43:09,204 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:43:09,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:43:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:09,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:43:09,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 14:43:09,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 14:43:10,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:43:10,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595501083] [2021-11-19 14:43:10,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595501083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:10,104 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:10,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:43:10,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494668222] [2021-11-19 14:43:10,104 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:10,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:43:10,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:43:10,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:43:10,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:43:10,105 INFO L87 Difference]: Start difference. First operand 3100 states and 4597 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) [2021-11-19 14:43:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:10,348 INFO L93 Difference]: Finished difference Result 6167 states and 9158 transitions. [2021-11-19 14:43:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:43:10,349 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 [2021-11-19 14:43:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:10,356 INFO L225 Difference]: With dead ends: 6167 [2021-11-19 14:43:10,356 INFO L226 Difference]: Without dead ends: 3104 [2021-11-19 14:43:10,359 INFO L932 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 [2021-11-19 14:43:10,359 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 4 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:10,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 403 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:43:10,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-11-19 14:43:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3104. [2021-11-19 14:43:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 1.4827586206896552) internal successors, (4601), 3103 states have internal predecessors, (4601), 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) [2021-11-19 14:43:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 4601 transitions. [2021-11-19 14:43:10,490 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 4601 transitions. Word has length 127 [2021-11-19 14:43:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:10,490 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 4601 transitions. [2021-11-19 14:43:10,490 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) [2021-11-19 14:43:10,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 4601 transitions. [2021-11-19 14:43:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 14:43:10,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:10,493 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:10,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:10,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:43:10,693 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1640288805, now seen corresponding path program 1 times [2021-11-19 14:43:10,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:43:10,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958584958] [2021-11-19 14:43:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:10,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:43:10,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:43:10,697 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:43:10,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:43:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:11,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:43:11,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:11,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:11,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:11,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:11,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:11,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:11,464 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:43:11,465 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 [2021-11-19 14:43:11,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:11,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:11,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:11,852 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:43:11,852 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 [2021-11-19 14:43:14,040 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:43:14,040 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 [2021-11-19 14:43:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:43:14,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:43:15,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:43:15,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958584958] [2021-11-19 14:43:15,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958584958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:15,256 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:15,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-19 14:43:15,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11659354] [2021-11-19 14:43:15,257 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:15,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:43:15,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:43:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:43:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:43:15,257 INFO L87 Difference]: Start difference. First operand 3104 states and 4601 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) [2021-11-19 14:43:17,279 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:26,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:30,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:30,598 INFO L93 Difference]: Finished difference Result 6568 states and 9713 transitions. [2021-11-19 14:43:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:43:30,600 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 [2021-11-19 14:43:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:30,606 INFO L225 Difference]: With dead ends: 6568 [2021-11-19 14:43:30,606 INFO L226 Difference]: Without dead ends: 3505 [2021-11-19 14:43:30,609 INFO L932 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 [2021-11-19 14:43:30,610 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 46 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:30,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 682 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 308 Invalid, 1 Unknown, 0 Unchecked, 15.2s Time] [2021-11-19 14:43:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2021-11-19 14:43:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 3355. [2021-11-19 14:43:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 1.4770423375074537) internal successors, (4954), 3354 states have internal predecessors, (4954), 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) [2021-11-19 14:43:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 4954 transitions. [2021-11-19 14:43:30,771 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 4954 transitions. Word has length 129 [2021-11-19 14:43:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:30,772 INFO L470 AbstractCegarLoop]: Abstraction has 3355 states and 4954 transitions. [2021-11-19 14:43:30,772 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) [2021-11-19 14:43:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 4954 transitions. [2021-11-19 14:43:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 14:43:30,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:30,775 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:30,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:30,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:43:30,978 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash -318285981, now seen corresponding path program 1 times [2021-11-19 14:43:30,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:43:30,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710091783] [2021-11-19 14:43:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:30,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:43:30,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:43:30,981 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:43:30,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:43:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:31,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:43:31,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:31,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:31,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:31,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:31,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:31,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:31,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:31,751 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-19 14:43:31,752 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 [2021-11-19 14:43:31,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:31,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:31,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:32,110 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:43:32,111 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 [2021-11-19 14:43:33,268 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:43:33,268 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 [2021-11-19 14:43:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:43:33,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:43:34,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:43:34,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710091783] [2021-11-19 14:43:34,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710091783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:34,124 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:34,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-19 14:43:34,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757047815] [2021-11-19 14:43:34,125 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:34,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:43:34,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:43:34,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:43:34,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:43:34,126 INFO L87 Difference]: Start difference. First operand 3355 states and 4954 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) [2021-11-19 14:43:36,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:44,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:44,122 INFO L93 Difference]: Finished difference Result 6888 states and 10165 transitions. [2021-11-19 14:43:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:43:44,124 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 [2021-11-19 14:43:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:44,131 INFO L225 Difference]: With dead ends: 6888 [2021-11-19 14:43:44,131 INFO L226 Difference]: Without dead ends: 3574 [2021-11-19 14:43:44,135 INFO L932 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 [2021-11-19 14:43:44,136 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 54 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:44,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 621 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2021-11-19 14:43:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2021-11-19 14:43:44,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 3496. [2021-11-19 14:43:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 3495 states have (on average 1.473247496423462) internal successors, (5149), 3495 states have internal predecessors, (5149), 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) [2021-11-19 14:43:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 5149 transitions. [2021-11-19 14:43:44,312 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 5149 transitions. Word has length 129 [2021-11-19 14:43:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:44,313 INFO L470 AbstractCegarLoop]: Abstraction has 3496 states and 5149 transitions. [2021-11-19 14:43:44,313 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) [2021-11-19 14:43:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 5149 transitions. [2021-11-19 14:43:44,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 14:43:44,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:44,318 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:44,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:44,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:43:44,536 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash 774629529, now seen corresponding path program 1 times [2021-11-19 14:43:44,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:43:44,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878378961] [2021-11-19 14:43:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:44,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:43:44,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:43:44,538 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:43:44,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:43:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:43:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:45,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:45,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:45,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:45,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:45,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:45,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:45,367 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:43:45,367 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 [2021-11-19 14:43:45,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:45,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:45,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:45,731 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:43:45,732 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 [2021-11-19 14:43:46,988 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:43:46,988 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 [2021-11-19 14:43:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:43:47,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:43:47,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:43:47,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878378961] [2021-11-19 14:43:47,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878378961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:47,697 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:47,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:43:47,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047496053] [2021-11-19 14:43:47,698 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:47,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:43:47,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:43:47,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:43:47,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:43:47,699 INFO L87 Difference]: Start difference. First operand 3496 states and 5149 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2021-11-19 14:43:49,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:51,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:03,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:05,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:08,697 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:11,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:12,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:14,263 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:16,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:18,588 INFO L93 Difference]: Finished difference Result 7814 states and 11463 transitions. [2021-11-19 14:44:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:44:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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 143 [2021-11-19 14:44:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:18,600 INFO L225 Difference]: With dead ends: 7814 [2021-11-19 14:44:18,600 INFO L226 Difference]: Without dead ends: 4359 [2021-11-19 14:44:18,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:44:18,605 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 284 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 67 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:18,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 779 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 546 Invalid, 2 Unknown, 0 Unchecked, 30.6s Time] [2021-11-19 14:44:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2021-11-19 14:44:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 3649. [2021-11-19 14:44:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 1.455592105263158) internal successors, (5310), 3648 states have internal predecessors, (5310), 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) [2021-11-19 14:44:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5310 transitions. [2021-11-19 14:44:18,799 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5310 transitions. Word has length 143 [2021-11-19 14:44:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:18,800 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 5310 transitions. [2021-11-19 14:44:18,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2021-11-19 14:44:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5310 transitions. [2021-11-19 14:44:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 14:44:18,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:18,805 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:18,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:44:19,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:44:19,026 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:19,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:19,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1664181171, now seen corresponding path program 1 times [2021-11-19 14:44:19,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:44:19,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224399246] [2021-11-19 14:44:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:19,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:44:19,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:44:19,029 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:44:19,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:44:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:44:19,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:19,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:19,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:19,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:19,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:19,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:19,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:19,833 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:44:19,834 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 [2021-11-19 14:44:19,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:19,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:19,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:20,193 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:44:20,193 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 [2021-11-19 14:44:21,560 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:44:21,561 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 [2021-11-19 14:44:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:44:21,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:44:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:44:22,246 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:44:22,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224399246] [2021-11-19 14:44:22,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224399246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:44:22,246 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:44:22,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:44:22,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751026915] [2021-11-19 14:44:22,247 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:44:22,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:44:22,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:44:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:44:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:44:22,248 INFO L87 Difference]: Start difference. First operand 3649 states and 5310 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 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) [2021-11-19 14:44:24,274 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:39,453 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:42,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:44,940 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:47,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:49,182 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:51,102 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:52,155 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:53,876 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:55,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:56,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:58,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:58,640 INFO L93 Difference]: Finished difference Result 7871 states and 11428 transitions. [2021-11-19 14:44:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:44:58,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 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 144 [2021-11-19 14:44:58,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:58,645 INFO L225 Difference]: With dead ends: 7871 [2021-11-19 14:44:58,645 INFO L226 Difference]: Without dead ends: 4263 [2021-11-19 14:44:58,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:44:58,648 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 256 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 71 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:58,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 803 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 36.1s Time] [2021-11-19 14:44:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-11-19 14:44:58,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3649. [2021-11-19 14:44:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 1.438048245614035) internal successors, (5246), 3648 states have internal predecessors, (5246), 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) [2021-11-19 14:44:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5246 transitions. [2021-11-19 14:44:58,826 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5246 transitions. Word has length 144 [2021-11-19 14:44:58,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:58,826 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 5246 transitions. [2021-11-19 14:44:58,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 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) [2021-11-19 14:44:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5246 transitions. [2021-11-19 14:44:58,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 14:44:58,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:58,832 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:58,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:44:59,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:44:59,054 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:59,054 INFO L85 PathProgramCache]: Analyzing trace with hash -859071212, now seen corresponding path program 1 times [2021-11-19 14:44:59,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:44:59,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046771581] [2021-11-19 14:44:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:59,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:44:59,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:44:59,056 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:44:59,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:44:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:59,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:44:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:59,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:59,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:59,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:59,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:59,912 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:44:59,912 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 [2021-11-19 14:44:59,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:59,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:59,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:45:00,228 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:45:00,229 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 [2021-11-19 14:45:01,311 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:45:01,311 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 [2021-11-19 14:45:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:45:01,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:45:01,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:45:01,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046771581] [2021-11-19 14:45:01,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046771581] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:45:01,921 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:45:01,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:45:01,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236467025] [2021-11-19 14:45:01,922 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:45:01,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:45:01,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:45:01,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:45:01,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:45:01,922 INFO L87 Difference]: Start difference. First operand 3649 states and 5246 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:45:03,939 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:45:15,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:45:17,067 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:45:19,815 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:45:20,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:45:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:45:22,971 INFO L93 Difference]: Finished difference Result 7883 states and 11312 transitions. [2021-11-19 14:45:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:45:22,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-19 14:45:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:45:22,998 INFO L225 Difference]: With dead ends: 7883 [2021-11-19 14:45:22,998 INFO L226 Difference]: Without dead ends: 4275 [2021-11-19 14:45:23,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:45:23,002 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 317 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:45:23,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 548 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 396 Invalid, 2 Unknown, 0 Unchecked, 20.8s Time] [2021-11-19 14:45:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-11-19 14:45:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3649. [2021-11-19 14:45:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 1.4205043859649122) internal successors, (5182), 3648 states have internal predecessors, (5182), 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) [2021-11-19 14:45:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5182 transitions. [2021-11-19 14:45:23,215 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5182 transitions. Word has length 151 [2021-11-19 14:45:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:45:23,216 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 5182 transitions. [2021-11-19 14:45:23,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:45:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5182 transitions. [2021-11-19 14:45:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 14:45:23,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:45:23,221 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:45:23,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:45:23,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:45:23,435 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:45:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:45:23,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1462730706, now seen corresponding path program 1 times [2021-11-19 14:45:23,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:45:23,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695543071] [2021-11-19 14:45:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:23,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:45:23,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:45:23,437 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:45:23,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:45:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:24,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:45:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:45:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:24,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:45:24,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:45:24,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:45:24,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:45:24,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:45:24,772 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:45:24,772 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 [2021-11-19 14:45:26,204 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:45:26,205 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 [2021-11-19 14:45:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 14:45:26,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 14:45:26,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:45:26,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695543071] [2021-11-19 14:45:26,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695543071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:45:26,825 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:45:26,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:45:26,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120516276] [2021-11-19 14:45:26,825 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:45:26,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:45:26,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:45:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:45:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:45:26,826 INFO L87 Difference]: Start difference. First operand 3649 states and 5182 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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) [2021-11-19 14:45:28,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:45:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:45:41,507 INFO L93 Difference]: Finished difference Result 7341 states and 10432 transitions. [2021-11-19 14:45:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:45:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-19 14:45:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:45:41,512 INFO L225 Difference]: With dead ends: 7341 [2021-11-19 14:45:41,512 INFO L226 Difference]: Without dead ends: 3733 [2021-11-19 14:45:41,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:45:41,516 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 29 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:45:41,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 739 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 1 Unknown, 0 Unchecked, 14.5s Time] [2021-11-19 14:45:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2021-11-19 14:45:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3649. [2021-11-19 14:45:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 1.418859649122807) internal successors, (5176), 3648 states have internal predecessors, (5176), 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) [2021-11-19 14:45:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5176 transitions. [2021-11-19 14:45:41,721 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5176 transitions. Word has length 151 [2021-11-19 14:45:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:45:41,721 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 5176 transitions. [2021-11-19 14:45:41,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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) [2021-11-19 14:45:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5176 transitions. [2021-11-19 14:45:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 14:45:41,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:45:41,727 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:45:41,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:45:41,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:45:41,945 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:45:41,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:45:41,945 INFO L85 PathProgramCache]: Analyzing trace with hash 756699299, now seen corresponding path program 1 times [2021-11-19 14:45:41,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:45:41,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211730494] [2021-11-19 14:45:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:45:41,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:45:41,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:45:41,947 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:45:41,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0471d50-2a6b-424c-bbb6-c5d50f3a0c3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:45:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:45:42,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:45:42,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:45:42,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:42,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:42,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:42,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:45:42,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:45:42,821 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:45:42,822 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 [2021-11-19 14:45:42,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:45:42,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:45:42,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:45:43,251 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:45:43,252 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 [2021-11-19 14:45:45,405 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:45:45,406 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 [2021-11-19 14:45:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:45:45,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:45:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:45:46,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:45:46,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211730494] [2021-11-19 14:45:46,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211730494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:45:46,237 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:45:46,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:45:46,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10580478] [2021-11-19 14:45:46,237 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:45:46,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:45:46,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:45:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:45:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:45:46,239 INFO L87 Difference]: Start difference. First operand 3649 states and 5176 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) [2021-11-19 14:45:48,268 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []