./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/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 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:00:06,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:00:06,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:00:06,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:00:06,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:00:06,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:00:06,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:00:06,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:00:06,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:00:06,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:00:06,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:00:06,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:00:06,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:00:06,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:00:06,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:00:06,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:00:06,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:00:06,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:00:06,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:00:06,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:00:06,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:00:06,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:00:06,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:00:06,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:00:06,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:00:06,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:00:06,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:00:06,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:00:06,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:00:06,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:00:06,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:00:06,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:00:06,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:00:06,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:00:06,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:00:06,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:00:06,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:00:06,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:00:06,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:00:06,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:00:06,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:00:06,287 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:00:06,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:00:06,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:00:06,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:00:06,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:00:06,333 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:00:06,334 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:00:06,334 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:00:06,334 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:00:06,340 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:00:06,341 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:00:06,342 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:00:06,342 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:00:06,343 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:00:06,343 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:00:06,343 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:00:06,343 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:00:06,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:00:06,344 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:00:06,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:00:06,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:00:06,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:00:06,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:00:06,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:00:06,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:00:06,346 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:00:06,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:00:06,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:00:06,346 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:00:06,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:00:06,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:00:06,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:00:06,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:06,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:00:06,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:00:06,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:00:06,350 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:00:06,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:00:06,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:00:06,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:00:06,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:00:06,351 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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-11-19 14:00:06,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:00:06,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:00:06,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:00:06,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:00:06,664 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:00:06,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-19 14:00:06,754 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/data/8b7992112/6d24fa06353b4065b0dabe21e3f2457a/FLAGa87d37c4e [2021-11-19 14:00:07,450 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:00:07,450 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-19 14:00:07,489 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/data/8b7992112/6d24fa06353b4065b0dabe21e3f2457a/FLAGa87d37c4e [2021-11-19 14:00:07,647 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/data/8b7992112/6d24fa06353b4065b0dabe21e3f2457a [2021-11-19 14:00:07,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:00:07,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:00:07,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:07,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:00:07,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:00:07,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:07" (1/1) ... [2021-11-19 14:00:07,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d41f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:07, skipping insertion in model container [2021-11-19 14:00:07,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:07" (1/1) ... [2021-11-19 14:00:07,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:00:07,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:08,246 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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-19 14:00:08,267 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:08,290 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 14:00:08,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2273b168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:08, skipping insertion in model container [2021-11-19 14:00:08,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:08,295 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:00:08,300 INFO L158 Benchmark]: Toolchain (without parser) took 645.41ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 55.6MB in the beginning and 77.9MB in the end (delta: -22.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:00:08,301 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory was 62.4MB in the beginning and 62.3MB in the end (delta: 32.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:00:08,302 INFO L158 Benchmark]: CACSL2BoogieTranslator took 642.69ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 55.4MB in the beginning and 77.9MB in the end (delta: -22.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:00:08,311 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory was 62.4MB in the beginning and 62.3MB in the end (delta: 32.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 642.69ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 55.4MB in the beginning and 77.9MB in the end (delta: -22.4MB). 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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/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 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:00:10,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:00:10,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:00:10,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:00:10,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:00:10,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:00:10,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:00:10,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:00:10,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:00:10,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:00:10,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:00:10,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:00:10,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:00:10,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:00:10,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:00:10,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:00:10,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:00:10,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:00:10,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:00:10,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:00:10,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:00:10,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:00:10,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:00:10,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:00:10,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:00:10,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:00:10,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:00:10,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:00:10,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:00:10,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:00:10,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:00:10,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:00:10,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:00:10,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:00:10,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:00:10,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:00:10,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:00:10,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:00:10,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:00:10,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:00:10,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:00:10,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:00:10,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:00:10,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:00:10,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:00:10,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:00:10,823 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:00:10,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:00:10,823 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:00:10,824 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:00:10,824 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:00:10,824 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:00:10,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:00:10,825 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:00:10,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:00:10,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:00:10,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:00:10,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:00:10,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:00:10,827 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:00:10,828 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:00:10,828 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:00:10,828 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:00:10,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:00:10,829 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:00:10,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:00:10,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:00:10,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:00:10,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:00:10,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:10,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:00:10,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:00:10,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:00:10,832 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:00:10,832 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:10,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:00:10,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:00:10,833 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:00:10,834 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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-11-19 14:00:11,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:00:11,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:00:11,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:00:11,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:00:11,269 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:00:11,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-19 14:00:11,342 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/data/095e13a4e/f66b8274fd5e43779686b938073d1a7b/FLAG2e2d49eb1 [2021-11-19 14:00:12,153 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:00:12,155 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-19 14:00:12,184 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/data/095e13a4e/f66b8274fd5e43779686b938073d1a7b/FLAG2e2d49eb1 [2021-11-19 14:00:12,312 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/data/095e13a4e/f66b8274fd5e43779686b938073d1a7b [2021-11-19 14:00:12,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:00:12,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:00:12,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:12,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:00:12,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:00:12,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:12" (1/1) ... [2021-11-19 14:00:12,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ca0374e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:12, skipping insertion in model container [2021-11-19 14:00:12,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:12" (1/1) ... [2021-11-19 14:00:12,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:00:12,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:12,954 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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-19 14:00:12,965 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:12,995 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:00:13,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:13,116 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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-19 14:00:13,119 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:13,137 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:00:13,306 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_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-19 14:00:13,318 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:13,342 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:00:13,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13 WrapperNode [2021-11-19 14:00:13,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:13,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:13,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:00:13,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:00:13,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13" (1/1) ... [2021-11-19 14:00:13,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13" (1/1) ... [2021-11-19 14:00:13,469 INFO L137 Inliner]: procedures = 36, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 756 [2021-11-19 14:00:13,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:13,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:00:13,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:00:13,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:00:13,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13" (1/1) ... [2021-11-19 14:00:13,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13" (1/1) ... [2021-11-19 14:00:13,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13" (1/1) ... [2021-11-19 14:00:13,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13" (1/1) ... [2021-11-19 14:00:13,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13" (1/1) ... [2021-11-19 14:00:13,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13" (1/1) ... [2021-11-19 14:00:13,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13" (1/1) ... [2021-11-19 14:00:13,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:00:13,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:00:13,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:00:13,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:00:13,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13" (1/1) ... [2021-11-19 14:00:13,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:13,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:13,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:00:13,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:00:13,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:00:13,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:00:13,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:00:13,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:00:13,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:00:13,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:00:13,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:00:13,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:00:13,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:00:13,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:00:13,902 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:00:13,904 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:00:13,928 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:00:23,361 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 14:00:23,362 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 14:00:23,362 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:00:23,377 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:00:23,377 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:00:23,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:00:23 BoogieIcfgContainer [2021-11-19 14:00:23,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:00:23,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:00:23,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:00:23,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:00:23,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:00:12" (1/3) ... [2021-11-19 14:00:23,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551b7385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:00:23, skipping insertion in model container [2021-11-19 14:00:23,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:13" (2/3) ... [2021-11-19 14:00:23,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551b7385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:00:23, skipping insertion in model container [2021-11-19 14:00:23,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:00:23" (3/3) ... [2021-11-19 14:00:23,392 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.10.i.cil-2.c [2021-11-19 14:00:23,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:00:23,403 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:00:23,467 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:00:23,477 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 14:00:23,477 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:00:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 14:00:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 14:00:23,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:23,526 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] [2021-11-19 14:00:23,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:23,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:23,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1692155939, now seen corresponding path program 1 times [2021-11-19 14:00:23,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:23,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006178176] [2021-11-19 14:00:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:23,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:23,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:23,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:23,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:00:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:23,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:00:24,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:24,099 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 14:00:24,112 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 14:00:24,200 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:24,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 14:00:24,213 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:24,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 14:00:24,245 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 14:00:24,868 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-19 14:00:24,869 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 14:00:25,052 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:25,055 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 14:00:25,063 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:25,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 14:00:25,094 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 14:00:25,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,287 INFO L244 Elim1Store]: Index analysis took 105 ms [2021-11-19 14:00:25,296 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 14:00:25,468 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-19 14:00:25,469 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 14:00:25,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:25,522 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 14:00:25,572 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 14:00:25,579 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 14:00:25,756 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 14:00:25,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:25,980 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:25,985 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-19 14:00:25,991 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:25,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-19 14:00:26,171 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:26,173 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 14:00:26,182 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:26,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-19 14:00:26,198 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:26,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-19 14:00:26,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:26,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-19 14:00:26,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:26,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-19 14:00:26,292 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:00:26,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-19 14:00:26,856 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 14:00:26,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:26,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006178176] [2021-11-19 14:00:26,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006178176] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:26,859 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:26,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:00:26,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144649112] [2021-11-19 14:00:26,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:26,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:00:26,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:26,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:00:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:00:26,903 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 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 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 14:00:28,949 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 14:00:30,961 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:00:38,229 WARN L515 Checker$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 14:00:40,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:00:42,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:00:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:43,857 INFO L93 Difference]: Finished difference Result 295 states and 495 transitions. [2021-11-19 14:00:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 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 43 [2021-11-19 14:00:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:43,874 INFO L225 Difference]: With dead ends: 295 [2021-11-19 14:00:43,874 INFO L226 Difference]: Without dead ends: 134 [2021-11-19 14:00:43,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:43,881 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 18 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:43,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 984 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 2 Unknown, 64 Unchecked, 16.8s Time] [2021-11-19 14:00:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-19 14:00:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-19 14:00:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.5263157894736843) internal successors, (203), 133 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 14:00:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 203 transitions. [2021-11-19 14:00:43,928 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 203 transitions. Word has length 43 [2021-11-19 14:00:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:43,929 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 203 transitions. [2021-11-19 14:00:43,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 14:00:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 203 transitions. [2021-11-19 14:00:43,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 14:00:43,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:43,933 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] [2021-11-19 14:00:43,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:00:44,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:44,149 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2115802661, now seen corresponding path program 1 times [2021-11-19 14:00:44,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:44,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86982487] [2021-11-19 14:00:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:44,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:44,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:44,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:00:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:44,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:44,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:44,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:44,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:44,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:44,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:44,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:00:44,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:00:45,078 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:00:45,079 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 14:00:48,568 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:00:48,569 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 14:00:56,724 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:00:56,726 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 14:00:56,828 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 14:00:56,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:05,136 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 14:01:05,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:05,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86982487] [2021-11-19 14:01:05,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86982487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:05,137 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:05,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-19 14:01:05,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401226069] [2021-11-19 14:01:05,138 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:05,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:01:05,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:01:05,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-19 14:01:05,141 INFO L87 Difference]: Start difference. First operand 134 states and 203 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 14:01:07,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:01:08,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:01:11,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:01:14,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:01:14,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:14,705 INFO L93 Difference]: Finished difference Result 273 states and 417 transitions. [2021-11-19 14:01:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:01:14,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 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 43 [2021-11-19 14:01:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:14,710 INFO L225 Difference]: With dead ends: 273 [2021-11-19 14:01:14,710 INFO L226 Difference]: Without dead ends: 149 [2021-11-19 14:01:14,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-19 14:01:14,713 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 16 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:14,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 564 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 1 Unknown, 106 Unchecked, 9.5s Time] [2021-11-19 14:01:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-19 14:01:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2021-11-19 14:01:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5416666666666667) internal successors, (222), 144 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 14:01:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 222 transitions. [2021-11-19 14:01:14,731 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 222 transitions. Word has length 43 [2021-11-19 14:01:14,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:14,731 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 222 transitions. [2021-11-19 14:01:14,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 14:01:14,732 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 222 transitions. [2021-11-19 14:01:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 14:01:14,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:14,735 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] [2021-11-19 14:01:14,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 14:01:14,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:14,939 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash -964647941, now seen corresponding path program 1 times [2021-11-19 14:01:14,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:14,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26322091] [2021-11-19 14:01:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:14,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:14,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:14,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:14,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:01:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:15,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:15,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:15,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:01:15,889 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:01:15,889 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 14:01:19,261 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:01:19,262 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 14:01:26,742 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:01:26,743 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 14:01:26,887 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 14:01:26,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:27,205 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 14:01:27,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:27,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26322091] [2021-11-19 14:01:27,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26322091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:27,206 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:27,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:01:27,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557526001] [2021-11-19 14:01:27,207 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:27,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:01:27,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:01:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:01:27,209 INFO L87 Difference]: Start difference. First operand 145 states and 222 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 14:01:29,243 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:01:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:32,964 INFO L93 Difference]: Finished difference Result 302 states and 464 transitions. [2021-11-19 14:01:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:01:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 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 56 [2021-11-19 14:01:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:32,968 INFO L225 Difference]: With dead ends: 302 [2021-11-19 14:01:32,969 INFO L226 Difference]: Without dead ends: 178 [2021-11-19 14:01:32,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:01:32,971 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 41 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:32,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 528 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 84 Invalid, 1 Unknown, 49 Unchecked, 5.7s Time] [2021-11-19 14:01:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-19 14:01:32,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 161. [2021-11-19 14:01:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.54375) internal successors, (247), 160 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 14:01:32,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 247 transitions. [2021-11-19 14:01:32,986 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 247 transitions. Word has length 56 [2021-11-19 14:01:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:32,987 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 247 transitions. [2021-11-19 14:01:32,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 14:01:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 247 transitions. [2021-11-19 14:01:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:01:32,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:32,990 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] [2021-11-19 14:01:33,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:33,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:33,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:33,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash 370114448, now seen corresponding path program 1 times [2021-11-19 14:01:33,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:33,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193913903] [2021-11-19 14:01:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:33,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:33,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:33,209 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:33,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:01:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:33,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:33,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:33,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:33,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:33,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:33,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:33,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:33,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:01:34,241 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:01:34,241 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 14:01:37,537 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:01:37,538 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 14:01:44,202 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:01:44,203 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 14:01:44,340 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 14:01:44,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:44,700 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 14:01:44,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:44,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193913903] [2021-11-19 14:01:44,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193913903] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:44,703 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:44,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:01:44,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774415372] [2021-11-19 14:01:44,704 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:44,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:01:44,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:44,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:01:44,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:01:44,710 INFO L87 Difference]: Start difference. First operand 161 states and 247 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 14:01:46,750 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:01:51,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:01:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:51,181 INFO L93 Difference]: Finished difference Result 312 states and 480 transitions. [2021-11-19 14:01:51,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:01:51,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 57 [2021-11-19 14:01:51,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:51,186 INFO L225 Difference]: With dead ends: 312 [2021-11-19 14:01:51,187 INFO L226 Difference]: Without dead ends: 172 [2021-11-19 14:01:51,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 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 14:01:51,189 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 23 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:51,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 756 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 101 Invalid, 1 Unknown, 136 Unchecked, 6.4s Time] [2021-11-19 14:01:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-19 14:01:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-11-19 14:01:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5263157894736843) internal successors, (261), 171 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 14:01:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 261 transitions. [2021-11-19 14:01:51,205 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 261 transitions. Word has length 57 [2021-11-19 14:01:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:51,205 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 261 transitions. [2021-11-19 14:01:51,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 14:01:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 261 transitions. [2021-11-19 14:01:51,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:01:51,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:51,208 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] [2021-11-19 14:01:51,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:51,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:51,423 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash -633507548, now seen corresponding path program 1 times [2021-11-19 14:01:51,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:51,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836167988] [2021-11-19 14:01:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:51,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:51,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:51,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:51,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:01:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:51,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:52,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:52,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:52,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:01:52,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:01:52,385 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:01:52,386 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 14:01:55,778 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:01:55,779 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 14:02:02,700 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:02:02,701 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 14:02:02,872 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 14:02:02,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:03,179 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 14:02:03,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:03,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836167988] [2021-11-19 14:02:03,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836167988] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:03,180 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:03,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:02:03,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437702398] [2021-11-19 14:02:03,180 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:03,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:02:03,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:03,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:02:03,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:02:03,182 INFO L87 Difference]: Start difference. First operand 172 states and 261 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 14:02:04,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:04,436 INFO L93 Difference]: Finished difference Result 332 states and 504 transitions. [2021-11-19 14:02:04,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:02:04,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 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 57 [2021-11-19 14:02:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:04,439 INFO L225 Difference]: With dead ends: 332 [2021-11-19 14:02:04,439 INFO L226 Difference]: Without dead ends: 181 [2021-11-19 14:02:04,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 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 14:02:04,440 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:04,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 791 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 101 Unchecked, 1.2s Time] [2021-11-19 14:02:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-19 14:02:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-19 14:02:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.511111111111111) internal successors, (272), 180 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 14:02:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 272 transitions. [2021-11-19 14:02:04,454 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 272 transitions. Word has length 57 [2021-11-19 14:02:04,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:04,455 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 272 transitions. [2021-11-19 14:02:04,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 14:02:04,455 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 272 transitions. [2021-11-19 14:02:04,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:02:04,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:04,457 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] [2021-11-19 14:02:04,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:04,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:04,666 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:04,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1501432389, now seen corresponding path program 1 times [2021-11-19 14:02:04,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:04,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141271657] [2021-11-19 14:02:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:04,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:04,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:04,671 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:04,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:02:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:02:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:05,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:05,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:05,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:05,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:05,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:05,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:02:05,550 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:02:05,550 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 14:02:08,973 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:02:08,973 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 14:02:16,610 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:02:16,611 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 14:02:16,752 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 14:02:16,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:17,083 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 14:02:17,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:17,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141271657] [2021-11-19 14:02:17,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141271657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:17,084 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:17,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:02:17,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137833416] [2021-11-19 14:02:17,085 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:17,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:02:17,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:02:17,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:02:17,087 INFO L87 Difference]: Start difference. First operand 181 states and 272 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 14:02:19,115 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 14:02:20,322 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 14:02:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:23,260 INFO L93 Difference]: Finished difference Result 343 states and 521 transitions. [2021-11-19 14:02:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:02:23,262 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 57 [2021-11-19 14:02:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:23,264 INFO L225 Difference]: With dead ends: 343 [2021-11-19 14:02:23,264 INFO L226 Difference]: Without dead ends: 192 [2021-11-19 14:02:23,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:02:23,266 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 48 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:23,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 649 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 1 Unknown, 46 Unchecked, 6.1s Time] [2021-11-19 14:02:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-19 14:02:23,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2021-11-19 14:02:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.518716577540107) internal successors, (284), 187 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 14:02:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 284 transitions. [2021-11-19 14:02:23,282 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 284 transitions. Word has length 57 [2021-11-19 14:02:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:23,283 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 284 transitions. [2021-11-19 14:02:23,283 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 14:02:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 284 transitions. [2021-11-19 14:02:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:02:23,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:23,285 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] [2021-11-19 14:02:23,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:23,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:23,508 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:23,508 INFO L85 PathProgramCache]: Analyzing trace with hash -766087557, now seen corresponding path program 1 times [2021-11-19 14:02:23,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:23,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234066144] [2021-11-19 14:02:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:23,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:23,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:23,510 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:23,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:02:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:24,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:02:24,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:24,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:24,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:24,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:24,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:24,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:24,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:02:24,431 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:02:24,431 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 14:02:27,769 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:02:27,770 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 14:02:35,034 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:02:35,034 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 14:02:35,146 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 14:02:35,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:35,422 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 14:02:35,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:35,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234066144] [2021-11-19 14:02:35,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234066144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:35,423 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:35,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:02:35,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894206275] [2021-11-19 14:02:35,423 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:35,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:02:35,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:35,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:02:35,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:02:35,424 INFO L87 Difference]: Start difference. First operand 188 states and 284 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 14:02:37,446 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 14:02:39,753 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:44,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:02:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:44,156 INFO L93 Difference]: Finished difference Result 350 states and 532 transitions. [2021-11-19 14:02:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:02:44,158 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 57 [2021-11-19 14:02:44,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:44,159 INFO L225 Difference]: With dead ends: 350 [2021-11-19 14:02:44,159 INFO L226 Difference]: Without dead ends: 192 [2021-11-19 14:02:44,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:02:44,161 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 36 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:44,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 729 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 100 Invalid, 1 Unknown, 107 Unchecked, 8.7s Time] [2021-11-19 14:02:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-19 14:02:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2021-11-19 14:02:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.5080213903743316) internal successors, (282), 187 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 14:02:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 282 transitions. [2021-11-19 14:02:44,174 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 282 transitions. Word has length 57 [2021-11-19 14:02:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:44,175 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 282 transitions. [2021-11-19 14:02:44,175 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 14:02:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 282 transitions. [2021-11-19 14:02:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:02:44,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:44,177 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] [2021-11-19 14:02:44,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 14:02:44,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:44,397 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:44,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash -189606874, now seen corresponding path program 1 times [2021-11-19 14:02:44,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:44,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851914614] [2021-11-19 14:02:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:44,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:44,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:44,399 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:44,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:02:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:44,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:02:44,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:44,784 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 14:02:44,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:44,956 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 14:02:44,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:44,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851914614] [2021-11-19 14:02:44,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851914614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:44,956 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:44,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:02:44,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412374971] [2021-11-19 14:02:44,957 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:44,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:02:44,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:02:44,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:02:44,958 INFO L87 Difference]: Start difference. First operand 188 states and 282 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 14:02:45,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:45,009 INFO L93 Difference]: Finished difference Result 663 states and 1009 transitions. [2021-11-19 14:02:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:02:45,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 57 [2021-11-19 14:02:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:45,014 INFO L225 Difference]: With dead ends: 663 [2021-11-19 14:02:45,014 INFO L226 Difference]: Without dead ends: 505 [2021-11-19 14:02:45,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 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 14:02:45,016 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 547 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:45,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 606 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:02:45,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-11-19 14:02:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 348. [2021-11-19 14:02:45,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.5100864553314122) internal successors, (524), 347 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 524 transitions. [2021-11-19 14:02:45,037 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 524 transitions. Word has length 57 [2021-11-19 14:02:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:45,038 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 524 transitions. [2021-11-19 14:02:45,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 14:02:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 524 transitions. [2021-11-19 14:02:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:02:45,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:45,040 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] [2021-11-19 14:02:45,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:45,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:45,256 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1087000152, now seen corresponding path program 1 times [2021-11-19 14:02:45,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:45,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865477544] [2021-11-19 14:02:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:45,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:45,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:45,259 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:45,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:02:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:02:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:45,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:45,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:45,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:45,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:02:45,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:02:46,074 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:02:46,074 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 14:02:49,343 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:02:49,343 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 14:02:56,179 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:02:56,179 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 14:02:56,324 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 14:02:56,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:56,622 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 14:02:56,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:56,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865477544] [2021-11-19 14:02:56,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865477544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:56,622 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:56,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:02:56,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778667968] [2021-11-19 14:02:56,623 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:56,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:02:56,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:02:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:02:56,625 INFO L87 Difference]: Start difference. First operand 348 states and 524 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 14:02:58,663 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 14:03:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:05,912 INFO L93 Difference]: Finished difference Result 682 states and 1032 transitions. [2021-11-19 14:03:05,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:03:05,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 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 57 [2021-11-19 14:03:05,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:05,918 INFO L225 Difference]: With dead ends: 682 [2021-11-19 14:03:05,919 INFO L226 Difference]: Without dead ends: 371 [2021-11-19 14:03:05,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-19 14:03:05,920 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 27 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:05,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 600 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 96 Invalid, 1 Unknown, 116 Unchecked, 5.1s Time] [2021-11-19 14:03:05,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-19 14:03:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2021-11-19 14:03:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.491891891891892) internal successors, (552), 370 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 14:03:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 552 transitions. [2021-11-19 14:03:05,943 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 552 transitions. Word has length 57 [2021-11-19 14:03:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:05,943 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 552 transitions. [2021-11-19 14:03:05,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 14:03:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 552 transitions. [2021-11-19 14:03:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 14:03:05,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:05,945 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] [2021-11-19 14:03:05,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:06,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:06,163 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash 471915876, now seen corresponding path program 1 times [2021-11-19 14:03:06,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:06,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498275067] [2021-11-19 14:03:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:06,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:06,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:06,166 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:06,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:03:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:06,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:03:06,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:06,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:06,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:06,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:06,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:06,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:06,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:03:07,244 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:03:07,245 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 14:03:10,516 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:03:10,516 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 14:03:17,433 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:03:17,433 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 14:03:17,590 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 14:03:17,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:17,936 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 14:03:17,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:17,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498275067] [2021-11-19 14:03:17,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498275067] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:17,937 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:17,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:03:17,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897086976] [2021-11-19 14:03:17,937 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:17,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:03:17,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:17,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:03:17,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:03:17,939 INFO L87 Difference]: Start difference. First operand 371 states and 552 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 14:03:19,967 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 14:03:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:22,840 INFO L93 Difference]: Finished difference Result 707 states and 1060 transitions. [2021-11-19 14:03:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:03:22,843 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 58 [2021-11-19 14:03:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:22,847 INFO L225 Difference]: With dead ends: 707 [2021-11-19 14:03:22,847 INFO L226 Difference]: Without dead ends: 373 [2021-11-19 14:03:22,848 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 14:03:22,849 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 27 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:22,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 667 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 99 Invalid, 1 Unknown, 36 Unchecked, 4.9s Time] [2021-11-19 14:03:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-19 14:03:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2021-11-19 14:03:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.478494623655914) internal successors, (550), 372 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 14:03:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 550 transitions. [2021-11-19 14:03:22,870 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 550 transitions. Word has length 58 [2021-11-19 14:03:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:22,871 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 550 transitions. [2021-11-19 14:03:22,871 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 14:03:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 550 transitions. [2021-11-19 14:03:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 14:03:22,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:22,873 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] [2021-11-19 14:03:22,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-19 14:03:23,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:23,106 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:23,106 INFO L85 PathProgramCache]: Analyzing trace with hash 466535849, now seen corresponding path program 1 times [2021-11-19 14:03:23,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:23,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468962391] [2021-11-19 14:03:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:23,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:23,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:23,108 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:23,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:03:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:23,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:03:23,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:23,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:23,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:23,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:23,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:03:24,041 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:03:24,042 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 14:03:27,413 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:03:27,414 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 14:03:34,501 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:03:34,502 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 14:03:34,668 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 14:03:34,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:34,996 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 14:03:34,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:34,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468962391] [2021-11-19 14:03:34,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468962391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:34,996 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:34,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:03:34,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507448163] [2021-11-19 14:03:34,997 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:34,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:03:34,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:34,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:03:34,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:03:34,998 INFO L87 Difference]: Start difference. First operand 373 states and 550 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 14:03:37,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:03:38,696 WARN L515 Checker$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 14:03:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:40,714 INFO L93 Difference]: Finished difference Result 711 states and 1058 transitions. [2021-11-19 14:03:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:03:40,717 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 59 [2021-11-19 14:03:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:40,720 INFO L225 Difference]: With dead ends: 711 [2021-11-19 14:03:40,720 INFO L226 Difference]: Without dead ends: 375 [2021-11-19 14:03:40,722 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 14:03:40,723 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 21 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:40,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 761 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 98 Invalid, 1 Unknown, 129 Unchecked, 5.7s Time] [2021-11-19 14:03:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-19 14:03:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2021-11-19 14:03:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.46524064171123) internal successors, (548), 374 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 14:03:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 548 transitions. [2021-11-19 14:03:40,745 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 548 transitions. Word has length 59 [2021-11-19 14:03:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:40,745 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 548 transitions. [2021-11-19 14:03:40,745 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 14:03:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 548 transitions. [2021-11-19 14:03:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:03:40,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:40,747 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] [2021-11-19 14:03:40,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:40,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:40,971 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:40,972 INFO L85 PathProgramCache]: Analyzing trace with hash 385987209, now seen corresponding path program 1 times [2021-11-19 14:03:40,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:40,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294696014] [2021-11-19 14:03:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:40,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:40,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:40,973 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:40,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:03:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:41,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:03:41,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:41,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:41,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:41,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:41,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:41,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:03:41,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:03:41,975 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:03:41,976 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 14:03:45,433 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:03:45,433 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 14:03:52,723 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:03:52,723 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 14:03:52,871 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 14:03:52,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:53,185 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 14:03:53,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:53,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294696014] [2021-11-19 14:03:53,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294696014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:53,186 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:53,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:03:53,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867455786] [2021-11-19 14:03:53,186 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:53,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:03:53,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:53,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:03:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:03:53,188 INFO L87 Difference]: Start difference. First operand 375 states and 548 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 14:03:55,214 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:03:59,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:01,360 INFO L93 Difference]: Finished difference Result 733 states and 1077 transitions. [2021-11-19 14:04:01,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:04:01,368 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 60 [2021-11-19 14:04:01,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:01,371 INFO L225 Difference]: With dead ends: 733 [2021-11-19 14:04:01,371 INFO L226 Difference]: Without dead ends: 395 [2021-11-19 14:04:01,372 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 14:04:01,373 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 34 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:01,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 714 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 118 Invalid, 1 Unknown, 86 Unchecked, 8.2s Time] [2021-11-19 14:04:01,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-19 14:04:01,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 375. [2021-11-19 14:04:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.4491978609625669) internal successors, (542), 374 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 14:04:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 542 transitions. [2021-11-19 14:04:01,395 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 542 transitions. Word has length 60 [2021-11-19 14:04:01,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:01,395 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 542 transitions. [2021-11-19 14:04:01,395 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 14:04:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 542 transitions. [2021-11-19 14:04:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:04:01,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:01,397 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] [2021-11-19 14:04:01,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:01,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:01,617 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1516075505, now seen corresponding path program 1 times [2021-11-19 14:04:01,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:01,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891885437] [2021-11-19 14:04:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:01,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:01,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:01,619 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:01,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:04:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:02,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:04:02,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:02,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:02,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:02,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:02,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:02,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:02,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:02,531 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:04:02,531 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 14:04:03,712 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:04:03,713 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 14:04:03,794 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 14:04:03,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:04,097 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 14:04:04,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:04,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891885437] [2021-11-19 14:04:04,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891885437] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:04,098 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:04,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:04:04,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473442579] [2021-11-19 14:04:04,098 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:04,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:04:04,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:04,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:04:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:04:04,100 INFO L87 Difference]: Start difference. First operand 375 states and 542 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 14:04:06,123 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:11,192 WARN L515 Checker$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 14:04:13,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:15,345 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:15,906 INFO L93 Difference]: Finished difference Result 770 states and 1121 transitions. [2021-11-19 14:04:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:04:15,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 14:04:15,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:15,916 INFO L225 Difference]: With dead ends: 770 [2021-11-19 14:04:15,916 INFO L226 Difference]: Without dead ends: 432 [2021-11-19 14:04:15,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 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 14:04:15,918 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 38 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:15,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 493 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 143 Invalid, 2 Unknown, 0 Unchecked, 11.7s Time] [2021-11-19 14:04:15,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-19 14:04:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 418. [2021-11-19 14:04:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.4364508393285371) internal successors, (599), 417 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 14:04:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 599 transitions. [2021-11-19 14:04:15,944 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 599 transitions. Word has length 60 [2021-11-19 14:04:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:15,944 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 599 transitions. [2021-11-19 14:04:15,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 14:04:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 599 transitions. [2021-11-19 14:04:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 14:04:15,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:15,947 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] [2021-11-19 14:04:15,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:16,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:16,162 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:16,163 INFO L85 PathProgramCache]: Analyzing trace with hash 340073590, now seen corresponding path program 1 times [2021-11-19 14:04:16,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:16,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973502512] [2021-11-19 14:04:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:16,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:16,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:16,165 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:16,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:04:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:16,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:04:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:16,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:16,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:16,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:16,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:16,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:17,024 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:04:17,025 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 14:04:17,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:17,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:17,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:17,448 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:04:17,448 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 14:04:19,902 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:04:19,902 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 14:04:19,935 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 14:04:19,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:20,369 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 14:04:20,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:20,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973502512] [2021-11-19 14:04:20,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973502512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:20,370 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:20,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:04:20,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908830396] [2021-11-19 14:04:20,370 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:20,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:04:20,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:20,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:04:20,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:04:20,371 INFO L87 Difference]: Start difference. First operand 418 states and 599 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 14:04:22,394 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:24,406 WARN L515 Checker$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 14:04:35,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:38,694 WARN L515 Checker$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 14:04:43,221 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:45,873 WARN L515 Checker$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 14:04:49,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:54,710 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:56,319 INFO L93 Difference]: Finished difference Result 1234 states and 1802 transitions. [2021-11-19 14:04:56,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:04:56,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 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 82 [2021-11-19 14:04:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:56,327 INFO L225 Difference]: With dead ends: 1234 [2021-11-19 14:04:56,327 INFO L226 Difference]: Without dead ends: 853 [2021-11-19 14:04:56,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 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 14:04:56,329 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 297 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 83 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:56,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 654 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 530 Invalid, 4 Unknown, 0 Unchecked, 35.8s Time] [2021-11-19 14:04:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-19 14:04:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 524. [2021-11-19 14:04:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.4665391969407267) internal successors, (767), 523 states have internal predecessors, (767), 0 states have call successors, (0), 0 states 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 14:04:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 767 transitions. [2021-11-19 14:04:56,379 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 767 transitions. Word has length 82 [2021-11-19 14:04:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:56,379 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 767 transitions. [2021-11-19 14:04:56,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 14:04:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 767 transitions. [2021-11-19 14:04:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 14:04:56,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:56,382 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] [2021-11-19 14:04:56,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:56,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:56,598 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:56,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1945814063, now seen corresponding path program 1 times [2021-11-19 14:04:56,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:56,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978454572] [2021-11-19 14:04:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:56,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:56,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:56,601 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:56,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:04:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:57,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:04:57,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:57,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:57,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:57,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:04:57,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:57,417 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:04:57,418 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 14:04:57,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:57,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:57,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:04:57,835 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:04:57,835 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 14:05:00,372 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:05:00,372 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 14:05:00,403 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 14:05:00,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:00,835 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 14:05:00,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:00,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978454572] [2021-11-19 14:05:00,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978454572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:00,836 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:00,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:05:00,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91323419] [2021-11-19 14:05:00,836 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:00,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:05:00,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:00,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:05:00,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:05:00,838 INFO L87 Difference]: Start difference. First operand 524 states and 767 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 14:05:02,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:04,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:15,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:18,051 WARN L515 Checker$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 14:05:20,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:25,751 WARN L515 Checker$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 14:05:28,126 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:35,595 WARN L515 Checker$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 14:05:36,660 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:40,307 INFO L93 Difference]: Finished difference Result 1370 states and 2035 transitions. [2021-11-19 14:05:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:05:40,310 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 83 [2021-11-19 14:05:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:40,316 INFO L225 Difference]: With dead ends: 1370 [2021-11-19 14:05:40,317 INFO L226 Difference]: Without dead ends: 883 [2021-11-19 14:05:40,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 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 14:05:40,319 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 333 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 84 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:40,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 653 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 519 Invalid, 4 Unknown, 0 Unchecked, 39.3s Time] [2021-11-19 14:05:40,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-11-19 14:05:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 568. [2021-11-19 14:05:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.5044091710758378) internal successors, (853), 567 states have internal predecessors, (853), 0 states have call successors, (0), 0 states 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 14:05:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 853 transitions. [2021-11-19 14:05:40,372 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 853 transitions. Word has length 83 [2021-11-19 14:05:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:40,373 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 853 transitions. [2021-11-19 14:05:40,373 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 14:05:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 853 transitions. [2021-11-19 14:05:40,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 14:05:40,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:40,377 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] [2021-11-19 14:05:40,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:40,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:05:40,601 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:05:40,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:40,602 INFO L85 PathProgramCache]: Analyzing trace with hash -794443931, now seen corresponding path program 1 times [2021-11-19 14:05:40,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:40,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883487132] [2021-11-19 14:05:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:05:40,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:40,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:40,605 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:40,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:05:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:41,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:05:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:41,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:05:41,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:05:41,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:05:41,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:05:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:05:41,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:05:41,672 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:05:41,673 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 14:05:41,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:05:41,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:05:41,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:05:42,119 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:05:42,119 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 14:05:44,047 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:05:44,047 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 14:05:44,176 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 14:05:44,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:44,651 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 14:05:44,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:44,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883487132] [2021-11-19 14:05:44,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883487132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:44,651 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:44,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:05:44,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312687583] [2021-11-19 14:05:44,651 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:44,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:05:44,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:05:44,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:05:44,653 INFO L87 Difference]: Start difference. First operand 568 states and 853 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 14:05:46,685 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 14:05:58,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:00,616 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:01,797 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:03,138 WARN L515 Checker$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 14:06:07,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:14,114 WARN L515 Checker$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 14:06:16,004 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:18,020 WARN L515 Checker$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 14:06:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:18,244 INFO L93 Difference]: Finished difference Result 1487 states and 2257 transitions. [2021-11-19 14:06:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:06:18,246 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 111 [2021-11-19 14:06:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:18,251 INFO L225 Difference]: With dead ends: 1487 [2021-11-19 14:06:18,252 INFO L226 Difference]: Without dead ends: 956 [2021-11-19 14:06:18,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 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 14:06:18,254 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 191 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 50 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:18,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 753 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 566 Invalid, 3 Unknown, 0 Unchecked, 33.4s Time] [2021-11-19 14:06:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-11-19 14:06:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 667. [2021-11-19 14:06:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 1.5195195195195195) internal successors, (1012), 666 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states 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 14:06:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1012 transitions. [2021-11-19 14:06:18,296 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1012 transitions. Word has length 111 [2021-11-19 14:06:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:18,296 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1012 transitions. [2021-11-19 14:06:18,297 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 14:06:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1012 transitions. [2021-11-19 14:06:18,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:06:18,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:18,300 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] [2021-11-19 14:06:18,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:18,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:18,534 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:06:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:18,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1179895462, now seen corresponding path program 1 times [2021-11-19 14:06:18,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:18,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981395509] [2021-11-19 14:06:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:18,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:18,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:18,537 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:18,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:06:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:06:19,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:19,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:19,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:19,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:19,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:19,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:06:19,337 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:06:19,338 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 14:06:19,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:06:19,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:06:19,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:06:19,746 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:06:19,746 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 14:06:22,204 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:06:22,204 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 14:06:22,329 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 14:06:22,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:22,839 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 14:06:22,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:22,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981395509] [2021-11-19 14:06:22,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981395509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:22,840 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:22,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:06:22,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036358709] [2021-11-19 14:06:22,840 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:22,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:06:22,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:22,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:06:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:06:22,842 INFO L87 Difference]: Start difference. First operand 667 states and 1012 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:24,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:30,330 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:35,640 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:39,234 WARN L515 Checker$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 14:06:40,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:45,163 WARN L515 Checker$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 14:06:49,627 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 14:06:51,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:51,512 INFO L93 Difference]: Finished difference Result 1748 states and 2649 transitions. [2021-11-19 14:06:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:06:51,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-19 14:06:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:51,519 INFO L225 Difference]: With dead ends: 1748 [2021-11-19 14:06:51,519 INFO L226 Difference]: Without dead ends: 1118 [2021-11-19 14:06:51,521 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 14:06:51,522 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 282 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 74 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:51,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 474 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 408 Invalid, 2 Unknown, 0 Unchecked, 28.5s Time] [2021-11-19 14:06:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-11-19 14:06:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 803. [2021-11-19 14:06:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.5261845386533666) internal successors, (1224), 802 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 14:06:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1224 transitions. [2021-11-19 14:06:51,577 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1224 transitions. Word has length 116 [2021-11-19 14:06:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:51,578 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1224 transitions. [2021-11-19 14:06:51,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:51,578 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1224 transitions. [2021-11-19 14:06:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:06:51,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:51,581 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] [2021-11-19 14:06:51,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:51,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:51,796 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:06:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:51,796 INFO L85 PathProgramCache]: Analyzing trace with hash -801583245, now seen corresponding path program 1 times [2021-11-19 14:06:51,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:51,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124588050] [2021-11-19 14:06:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:51,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:51,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:51,798 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:51,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:06:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:52,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:06:52,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:52,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:52,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:52,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:52,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:52,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:06:52,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:06:52,585 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:06:52,585 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 14:06:52,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:06:52,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:06:52,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:06:53,000 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:06:53,000 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 14:06:55,325 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:06:55,325 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 14:06:55,457 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 14:06:55,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:55,968 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 14:06:55,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:55,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124588050] [2021-11-19 14:06:55,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124588050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:55,969 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:55,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:06:55,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064301313] [2021-11-19 14:06:55,972 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:55,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:06:55,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:06:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:06:55,974 INFO L87 Difference]: Start difference. First operand 803 states and 1224 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:57,999 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 14:07:06,583 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:07:11,795 WARN L515 Checker$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 14:07:12,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:07:14,654 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:07:15,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:07:20,741 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:07:24,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:07:26,229 WARN L515 Checker$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 14:07:30,221 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:07:34,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:07:37,330 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 14:07:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:40,792 INFO L93 Difference]: Finished difference Result 1874 states and 2843 transitions. [2021-11-19 14:07:40,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:07:40,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-19 14:07:40,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:40,800 INFO L225 Difference]: With dead ends: 1874 [2021-11-19 14:07:40,800 INFO L226 Difference]: Without dead ends: 1108 [2021-11-19 14:07:40,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 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 14:07:40,802 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 257 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 78 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:40,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 673 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 610 Invalid, 3 Unknown, 0 Unchecked, 44.6s Time] [2021-11-19 14:07:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-11-19 14:07:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 803. [2021-11-19 14:07:40,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.5211970074812968) internal successors, (1220), 802 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states 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 14:07:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1220 transitions. [2021-11-19 14:07:40,849 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1220 transitions. Word has length 117 [2021-11-19 14:07:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:40,849 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1220 transitions. [2021-11-19 14:07:40,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1220 transitions. [2021-11-19 14:07:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:07:40,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:40,853 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] [2021-11-19 14:07:40,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:41,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:41,073 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:07:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2033381055, now seen corresponding path program 1 times [2021-11-19 14:07:41,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:41,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554089398] [2021-11-19 14:07:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:41,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:41,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:41,075 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:41,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:07:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:07:41,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:41,693 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 14:07:41,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:42,054 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 14:07:42,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:42,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554089398] [2021-11-19 14:07:42,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554089398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:42,054 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:07:42,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:07:42,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743363688] [2021-11-19 14:07:42,055 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:42,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:07:42,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:07:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:07:42,056 INFO L87 Difference]: Start difference. First operand 803 states and 1220 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 14:07:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:42,484 INFO L93 Difference]: Finished difference Result 2983 states and 4570 transitions. [2021-11-19 14:07:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:07:42,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 125 [2021-11-19 14:07:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:42,496 INFO L225 Difference]: With dead ends: 2983 [2021-11-19 14:07:42,496 INFO L226 Difference]: Without dead ends: 2217 [2021-11-19 14:07:42,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 246 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 14:07:42,511 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 397 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:42,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 581 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:07:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-11-19 14:07:42,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2207. [2021-11-19 14:07:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 1.526745240253853) internal successors, (3368), 2206 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states 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 14:07:42,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 3368 transitions. [2021-11-19 14:07:42,615 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 3368 transitions. Word has length 125 [2021-11-19 14:07:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:42,615 INFO L470 AbstractCegarLoop]: Abstraction has 2207 states and 3368 transitions. [2021-11-19 14:07:42,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 14:07:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 3368 transitions. [2021-11-19 14:07:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:07:42,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:42,621 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] [2021-11-19 14:07:42,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:42,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:42,837 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:07:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:42,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2053704705, now seen corresponding path program 1 times [2021-11-19 14:07:42,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:42,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542429224] [2021-11-19 14:07:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:42,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:42,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:42,839 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:42,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:07:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:43,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:07:43,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:43,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:07:43,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:07:43,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:07:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:07:43,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:07:43,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:07:43,614 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:07:43,614 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 14:07:43,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:07:43,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:07:43,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:07:44,054 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:07:44,055 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 14:07:46,567 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:07:46,567 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 14:07:46,699 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 14:07:46,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:47,961 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 14:07:47,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:47,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542429224] [2021-11-19 14:07:47,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542429224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:47,962 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:07:47,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-19 14:07:47,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33505444] [2021-11-19 14:07:47,962 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:47,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:07:47,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:07:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:07:47,963 INFO L87 Difference]: Start difference. First operand 2207 states and 3368 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 14:07:49,989 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 14:07:51,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:08:01,727 WARN L515 Checker$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 14:08:04,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:08:10,814 WARN L515 Checker$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 14:08:12,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:08:12,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:12,968 INFO L93 Difference]: Finished difference Result 4814 states and 7325 transitions. [2021-11-19 14:08:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:08:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 126 [2021-11-19 14:08:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:12,986 INFO L225 Difference]: With dead ends: 4814 [2021-11-19 14:08:12,986 INFO L226 Difference]: Without dead ends: 2644 [2021-11-19 14:08:12,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 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 14:08:12,990 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 52 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:12,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 568 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 324 Invalid, 3 Unknown, 0 Unchecked, 24.8s Time] [2021-11-19 14:08:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-11-19 14:08:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2458. [2021-11-19 14:08:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 2457 states have (on average 1.5242165242165242) internal successors, (3745), 2457 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states 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 14:08:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 3745 transitions. [2021-11-19 14:08:13,113 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 3745 transitions. Word has length 126 [2021-11-19 14:08:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:13,114 INFO L470 AbstractCegarLoop]: Abstraction has 2458 states and 3745 transitions. [2021-11-19 14:08:13,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 14:08:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 3745 transitions. [2021-11-19 14:08:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:08:13,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:13,119 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] [2021-11-19 14:08:13,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:13,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:13,337 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:08:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:13,337 INFO L85 PathProgramCache]: Analyzing trace with hash -916406397, now seen corresponding path program 1 times [2021-11-19 14:08:13,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:13,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010379317] [2021-11-19 14:08:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:13,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:13,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:13,338 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:13,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:08:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:13,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:08:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:14,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:14,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:14,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:14,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:14,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:14,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:08:14,206 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-19 14:08:14,207 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 14:08:14,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:08:14,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:08:14,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:08:14,690 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:08:14,690 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 14:08:16,009 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:08:16,009 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 14:08:16,183 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 14:08:16,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:16,986 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 14:08:16,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:16,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010379317] [2021-11-19 14:08:16,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010379317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:16,987 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:16,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-19 14:08:16,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245153779] [2021-11-19 14:08:16,987 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:16,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:08:16,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:16,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:08:16,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:08:16,989 INFO L87 Difference]: Start difference. First operand 2458 states and 3745 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 14:08:19,028 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 14:08:27,799 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 14:08:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:28,431 INFO L93 Difference]: Finished difference Result 5092 states and 7741 transitions. [2021-11-19 14:08:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:08:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 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 126 [2021-11-19 14:08:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:28,446 INFO L225 Difference]: With dead ends: 5092 [2021-11-19 14:08:28,447 INFO L226 Difference]: Without dead ends: 2671 [2021-11-19 14:08:28,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:08:28,449 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 50 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:28,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 551 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 11.3s Time] [2021-11-19 14:08:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-11-19 14:08:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2599. [2021-11-19 14:08:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2598 states have (on average 1.5165511932255582) internal successors, (3940), 2598 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states 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 14:08:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3940 transitions. [2021-11-19 14:08:28,601 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3940 transitions. Word has length 126 [2021-11-19 14:08:28,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:28,602 INFO L470 AbstractCegarLoop]: Abstraction has 2599 states and 3940 transitions. [2021-11-19 14:08:28,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 14:08:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3940 transitions. [2021-11-19 14:08:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 14:08:28,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:28,609 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:28,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:28,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:28,822 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:08:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:28,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1708257580, now seen corresponding path program 1 times [2021-11-19 14:08:28,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:28,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125954940] [2021-11-19 14:08:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:28,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:28,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:28,825 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:28,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:08:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:29,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:08:29,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:29,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:29,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:29,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:29,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:29,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:29,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:08:29,734 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:08:29,734 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 14:08:29,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:08:29,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:08:29,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:08:30,177 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:08:30,177 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 14:08:32,005 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:08:32,006 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 14:08:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:08:32,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:08:32,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:32,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125954940] [2021-11-19 14:08:32,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125954940] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:32,725 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:32,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:08:32,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732511791] [2021-11-19 14:08:32,726 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:32,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:08:32,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:32,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:08:32,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:08:32,727 INFO L87 Difference]: Start difference. First operand 2599 states and 3940 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 14:08:34,752 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 14:08:36,259 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:08:37,380 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:08:47,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:08:50,134 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:08:51,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:08:52,569 WARN L515 Checker$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 14:08:54,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:01,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:03,163 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:07,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:09,517 INFO L93 Difference]: Finished difference Result 6004 states and 9044 transitions. [2021-11-19 14:09:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:09,519 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 138 [2021-11-19 14:09:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:09,535 INFO L225 Difference]: With dead ends: 6004 [2021-11-19 14:09:09,535 INFO L226 Difference]: Without dead ends: 3442 [2021-11-19 14:09:09,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 268 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 14:09:09,538 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 267 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 61 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:09,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 706 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 536 Invalid, 3 Unknown, 0 Unchecked, 36.5s Time] [2021-11-19 14:09:09,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2021-11-19 14:09:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 2776. [2021-11-19 14:09:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 1.5059459459459459) internal successors, (4179), 2775 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states 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 14:09:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 4179 transitions. [2021-11-19 14:09:09,664 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 4179 transitions. Word has length 138 [2021-11-19 14:09:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:09,665 INFO L470 AbstractCegarLoop]: Abstraction has 2776 states and 4179 transitions. [2021-11-19 14:09:09,665 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 14:09:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 4179 transitions. [2021-11-19 14:09:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:09:09,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:09,672 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:09,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:09,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:09,878 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:09:09,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:09,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1054534706, now seen corresponding path program 1 times [2021-11-19 14:09:09,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:09,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234024694] [2021-11-19 14:09:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:09,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:09,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:09,881 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:09,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:09:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:09:10,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:10,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:10,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:10,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:10,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:10,687 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:09:10,688 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 14:09:10,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:10,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:10,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:11,096 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:09:11,097 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 14:09:12,925 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:09:12,926 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 14:09:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:09:13,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:09:13,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:13,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234024694] [2021-11-19 14:09:13,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234024694] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:13,714 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:13,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:09:13,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042148923] [2021-11-19 14:09:13,715 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:13,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:09:13,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:13,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:09:13,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:09:13,716 INFO L87 Difference]: Start difference. First operand 2776 states and 4179 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 14:09:15,737 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:23,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:25,027 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:27,072 WARN L515 Checker$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 14:09:29,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:30,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:32,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:33,315 WARN L515 Checker$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 14:09:34,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:36,070 WARN L515 Checker$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 14:09:37,288 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:39,617 WARN L515 Checker$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 14:09:43,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:45,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:46,309 INFO L93 Difference]: Finished difference Result 6079 states and 9087 transitions. [2021-11-19 14:09:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:09:46,312 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 139 [2021-11-19 14:09:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:46,329 INFO L225 Difference]: With dead ends: 6079 [2021-11-19 14:09:46,330 INFO L226 Difference]: Without dead ends: 3340 [2021-11-19 14:09:46,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 270 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 14:09:46,333 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 301 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:46,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 497 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 403 Invalid, 2 Unknown, 0 Unchecked, 32.3s Time] [2021-11-19 14:09:46,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-11-19 14:09:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 2776. [2021-11-19 14:09:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 1.4915315315315316) internal successors, (4139), 2775 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states 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 14:09:46,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 4139 transitions. [2021-11-19 14:09:46,480 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 4139 transitions. Word has length 139 [2021-11-19 14:09:46,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:46,480 INFO L470 AbstractCegarLoop]: Abstraction has 2776 states and 4139 transitions. [2021-11-19 14:09:46,480 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 14:09:46,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 4139 transitions. [2021-11-19 14:09:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 14:09:46,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:46,484 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 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 14:09:46,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:46,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:46,685 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:09:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:46,686 INFO L85 PathProgramCache]: Analyzing trace with hash 536372633, now seen corresponding path program 1 times [2021-11-19 14:09:46,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:46,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486292505] [2021-11-19 14:09:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:46,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:46,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:46,688 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:46,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:09:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:47,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:09:47,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:47,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:47,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:47,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:47,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:09:47,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:47,469 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:09:47,469 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 14:09:47,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:47,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:47,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:09:47,908 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:09:47,909 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 14:09:49,623 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:09:49,624 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 14:09:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:09:49,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:09:50,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:50,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486292505] [2021-11-19 14:09:50,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486292505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:50,365 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:50,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:09:50,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031132430] [2021-11-19 14:09:50,366 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:50,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:09:50,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:50,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:09:50,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:09:50,367 INFO L87 Difference]: Start difference. First operand 2776 states and 4139 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 14:09:52,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:54,402 WARN L515 Checker$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 14:10:01,346 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:10:04,754 WARN L515 Checker$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 14:10:06,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:10:08,659 WARN L515 Checker$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 14:10:11,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:10:16,512 WARN L515 Checker$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 14:10:19,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:10:21,236 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:10:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:22,205 INFO L93 Difference]: Finished difference Result 6316 states and 9358 transitions. [2021-11-19 14:10:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:10:22,208 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 141 [2021-11-19 14:10:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:22,231 INFO L225 Difference]: With dead ends: 6316 [2021-11-19 14:10:22,231 INFO L226 Difference]: Without dead ends: 3577 [2021-11-19 14:10:22,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 274 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 14:10:22,234 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 264 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 71 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:22,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 524 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 417 Invalid, 2 Unknown, 0 Unchecked, 31.6s Time] [2021-11-19 14:10:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2021-11-19 14:10:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 2941. [2021-11-19 14:10:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2941 states, 2940 states have (on average 1.4768707482993197) internal successors, (4342), 2940 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states 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 14:10:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2941 states to 2941 states and 4342 transitions. [2021-11-19 14:10:22,358 INFO L78 Accepts]: Start accepts. Automaton has 2941 states and 4342 transitions. Word has length 141 [2021-11-19 14:10:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:22,358 INFO L470 AbstractCegarLoop]: Abstraction has 2941 states and 4342 transitions. [2021-11-19 14:10:22,358 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 14:10:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2941 states and 4342 transitions. [2021-11-19 14:10:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 14:10:22,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:22,362 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 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 14:10:22,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:22,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:22,563 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:10:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash 565975067, now seen corresponding path program 1 times [2021-11-19 14:10:22,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:22,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886008801] [2021-11-19 14:10:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:22,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:22,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:22,565 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:22,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:10:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:23,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:10:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:23,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:10:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:10:23,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:10:23,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:10:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:10:23,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:10:23,353 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:10:23,353 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 14:10:23,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:10:23,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:10:23,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:10:23,777 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:10:23,777 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 14:10:25,438 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:10:25,439 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 14:10:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:10:25,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:10:26,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:26,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886008801] [2021-11-19 14:10:26,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886008801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:26,203 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:10:26,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:10:26,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608715432] [2021-11-19 14:10:26,204 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:26,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:10:26,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:26,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:10:26,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:10:26,205 INFO L87 Difference]: Start difference. First operand 2941 states and 4342 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 14:10:28,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:10:29,657 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:10:39,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:10:40,338 WARN L515 Checker$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 14:10:46,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:10:49,073 WARN L515 Checker$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 14:10:51,207 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:10:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:54,039 INFO L93 Difference]: Finished difference Result 6598 states and 9698 transitions. [2021-11-19 14:10:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:10:54,040 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 142 [2021-11-19 14:10:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:54,050 INFO L225 Difference]: With dead ends: 6598 [2021-11-19 14:10:54,050 INFO L226 Difference]: Without dead ends: 3694 [2021-11-19 14:10:54,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 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 14:10:54,054 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 242 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 73 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:54,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 455 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 404 Invalid, 2 Unknown, 0 Unchecked, 27.6s Time] [2021-11-19 14:10:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2021-11-19 14:10:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 3130. [2021-11-19 14:10:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3130 states, 3129 states have (on average 1.4621284755512944) internal successors, (4575), 3129 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states 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 14:10:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 4575 transitions. [2021-11-19 14:10:54,204 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 4575 transitions. Word has length 142 [2021-11-19 14:10:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:54,205 INFO L470 AbstractCegarLoop]: Abstraction has 3130 states and 4575 transitions. [2021-11-19 14:10:54,205 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 14:10:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 4575 transitions. [2021-11-19 14:10:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 14:10:54,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:54,209 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] [2021-11-19 14:10:54,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:54,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:54,410 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:10:54,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:54,411 INFO L85 PathProgramCache]: Analyzing trace with hash -801932358, now seen corresponding path program 1 times [2021-11-19 14:10:54,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:54,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535666405] [2021-11-19 14:10:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:54,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:54,413 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:54,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:10:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:55,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:10:55,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:55,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:10:55,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:10:55,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:10:55,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:10:55,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:10:55,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:10:55,451 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:10:55,451 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 14:10:55,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:10:55,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:10:55,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:10:55,917 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:10:55,917 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 14:10:57,386 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:10:57,387 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 14:10:57,644 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 14:10:57,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:58,220 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 14:10:58,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:58,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535666405] [2021-11-19 14:10:58,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535666405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:58,220 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:10:58,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:10:58,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224851385] [2021-11-19 14:10:58,221 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:58,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:10:58,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:58,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:10:58,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:10:58,223 INFO L87 Difference]: Start difference. First operand 3130 states and 4575 transitions. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:11:00,261 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 14:11:02,170 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:11:10,521 WARN L515 Checker$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 14:11:13,194 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:11:14,736 WARN L515 Checker$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 14:11:16,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:11:18,389 WARN L515 Checker$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 14:11:21,753 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:11:23,767 WARN L515 Checker$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 14:11:25,449 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 14:11:26,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:26,030 INFO L93 Difference]: Finished difference Result 6787 states and 9879 transitions. [2021-11-19 14:11:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:11:26,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 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 148 [2021-11-19 14:11:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:26,039 INFO L225 Difference]: With dead ends: 6787 [2021-11-19 14:11:26,040 INFO L226 Difference]: Without dead ends: 3694 [2021-11-19 14:11:26,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 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 14:11:26,043 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 249 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 68 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:26,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 469 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 407 Invalid, 3 Unknown, 0 Unchecked, 27.5s Time] [2021-11-19 14:11:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2021-11-19 14:11:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 3130. [2021-11-19 14:11:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3130 states, 3129 states have (on average 1.447427293064877) internal successors, (4529), 3129 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states 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 14:11:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 4529 transitions. [2021-11-19 14:11:26,175 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 4529 transitions. Word has length 148 [2021-11-19 14:11:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:26,176 INFO L470 AbstractCegarLoop]: Abstraction has 3130 states and 4529 transitions. [2021-11-19 14:11:26,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:11:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 4529 transitions. [2021-11-19 14:11:26,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 14:11:26,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:26,203 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] [2021-11-19 14:11:26,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:26,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:26,418 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:11:26,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:26,418 INFO L85 PathProgramCache]: Analyzing trace with hash -886626973, now seen corresponding path program 1 times [2021-11-19 14:11:26,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:26,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675636421] [2021-11-19 14:11:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:11:26,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:26,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:26,421 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:26,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:11:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:27,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:11:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:27,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:11:27,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:11:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:11:27,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:11:27,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:11:27,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:11:27,323 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:11:27,324 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 14:11:27,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:11:27,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:11:27,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:11:27,738 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:11:27,739 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 14:11:29,926 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:11:29,926 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 14:11:30,147 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 14:11:30,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:30,736 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 14:11:30,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:30,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675636421] [2021-11-19 14:11:30,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675636421] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:30,737 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:30,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:11:30,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833246812] [2021-11-19 14:11:30,737 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:30,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:11:30,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:30,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:11:30,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:11:30,738 INFO L87 Difference]: Start difference. First operand 3130 states and 4529 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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 14:11:32,764 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 14:11:34,775 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:11:44,397 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:11:50,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:11:51,202 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:11:55,551 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:11:58,399 WARN L515 Checker$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 14:12:02,084 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 14:12:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:04,990 INFO L93 Difference]: Finished difference Result 7006 states and 10102 transitions. [2021-11-19 14:12:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:12:04,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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 148 [2021-11-19 14:12:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:05,000 INFO L225 Difference]: With dead ends: 7006 [2021-11-19 14:12:05,000 INFO L226 Difference]: Without dead ends: 3913 [2021-11-19 14:12:05,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 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 14:12:05,003 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 183 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 66 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:05,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 550 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 500 Invalid, 3 Unknown, 0 Unchecked, 33.9s Time] [2021-11-19 14:12:05,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2021-11-19 14:12:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3355. [2021-11-19 14:12:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 1.4424567680381635) internal successors, (4838), 3354 states have internal predecessors, (4838), 0 states have call successors, (0), 0 states 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 14:12:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 4838 transitions. [2021-11-19 14:12:05,141 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 4838 transitions. Word has length 148 [2021-11-19 14:12:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:05,141 INFO L470 AbstractCegarLoop]: Abstraction has 3355 states and 4838 transitions. [2021-11-19 14:12:05,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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 14:12:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 4838 transitions. [2021-11-19 14:12:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 14:12:05,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:05,163 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] [2021-11-19 14:12:05,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:05,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:05,366 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:12:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:05,367 INFO L85 PathProgramCache]: Analyzing trace with hash -683490884, now seen corresponding path program 1 times [2021-11-19 14:12:05,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:05,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561734670] [2021-11-19 14:12:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:12:05,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:05,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:05,369 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:05,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:12:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:06,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:12:06,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:06,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:06,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:12:06,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:12:06,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:12:06,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:12:06,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:12:06,707 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:12:06,708 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 14:12:08,245 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:12:08,245 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 14:12:08,443 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 14:12:08,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:08,931 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 14:12:08,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:08,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561734670] [2021-11-19 14:12:08,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561734670] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:08,931 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:08,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:12:08,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27599611] [2021-11-19 14:12:08,932 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:08,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:12:08,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:08,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:12:08,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:12:08,933 INFO L87 Difference]: Start difference. First operand 3355 states and 4838 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 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 14:12:10,961 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 14:12:12,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:12:23,436 WARN L515 Checker$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 14:12:24,515 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:12:26,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:12:31,893 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 14:12:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:32,542 INFO L93 Difference]: Finished difference Result 6904 states and 9957 transitions. [2021-11-19 14:12:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:12:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 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 148 [2021-11-19 14:12:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:32,553 INFO L225 Difference]: With dead ends: 6904 [2021-11-19 14:12:32,554 INFO L226 Difference]: Without dead ends: 3586 [2021-11-19 14:12:32,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 290 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 14:12:32,580 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 27 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:32,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 656 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 270 Invalid, 3 Unknown, 0 Unchecked, 23.4s Time] [2021-11-19 14:12:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-11-19 14:12:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3508. [2021-11-19 14:12:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3508 states, 3507 states have (on average 1.4402623324779014) internal successors, (5051), 3507 states have internal predecessors, (5051), 0 states have call successors, (0), 0 states 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 14:12:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3508 states to 3508 states and 5051 transitions. [2021-11-19 14:12:32,804 INFO L78 Accepts]: Start accepts. Automaton has 3508 states and 5051 transitions. Word has length 148 [2021-11-19 14:12:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:32,805 INFO L470 AbstractCegarLoop]: Abstraction has 3508 states and 5051 transitions. [2021-11-19 14:12:32,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 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 14:12:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3508 states and 5051 transitions. [2021-11-19 14:12:32,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 14:12:32,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:32,812 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:32,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:33,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:33,026 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:12:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:33,027 INFO L85 PathProgramCache]: Analyzing trace with hash -180614116, now seen corresponding path program 1 times [2021-11-19 14:12:33,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:33,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561352911] [2021-11-19 14:12:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:12:33,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:33,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:33,029 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:33,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:12:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:33,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:12:33,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:33,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:33,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:33,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:33,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:33,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:12:33,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:12:33,885 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:12:33,885 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 14:12:33,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:12:33,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:12:33,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:12:34,373 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:12:34,374 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 14:12:36,596 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:12:36,597 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 14:12:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:12:36,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:12:37,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:37,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561352911] [2021-11-19 14:12:37,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561352911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:37,545 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:37,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:12:37,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709572258] [2021-11-19 14:12:37,546 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:37,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:12:37,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:12:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:12:37,547 INFO L87 Difference]: Start difference. First operand 3508 states and 5051 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:39,585 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 14:12:41,259 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:12:49,991 WARN L515 Checker$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 14:12:51,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:12:52,590 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:12:54,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:12:56,658 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:12:58,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:13:02,707 WARN L515 Checker$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 14:13:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:03,795 INFO L93 Difference]: Finished difference Result 7513 states and 10783 transitions. [2021-11-19 14:13:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:03,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-19 14:13:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:03,805 INFO L225 Difference]: With dead ends: 7513 [2021-11-19 14:13:03,805 INFO L226 Difference]: Without dead ends: 4042 [2021-11-19 14:13:03,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 290 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 14:13:03,810 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 235 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 73 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:03,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 447 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 401 Invalid, 2 Unknown, 0 Unchecked, 25.9s Time] [2021-11-19 14:13:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4042 states. [2021-11-19 14:13:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4042 to 3514. [2021-11-19 14:13:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3513 states have (on average 1.4343865641901508) internal successors, (5039), 3513 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states 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 14:13:04,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5039 transitions. [2021-11-19 14:13:04,041 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5039 transitions. Word has length 149 [2021-11-19 14:13:04,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:04,041 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 5039 transitions. [2021-11-19 14:13:04,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:04,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5039 transitions. [2021-11-19 14:13:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 14:13:04,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:04,048 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:04,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:04,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:04,270 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:13:04,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:04,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1105184463, now seen corresponding path program 1 times [2021-11-19 14:13:04,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:04,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16909188] [2021-11-19 14:13:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:13:04,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:04,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:04,274 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:04,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:13:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:05,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:13:05,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:13:05,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:13:05,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:13:05,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:13:05,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:13:05,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:13:05,303 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:13:05,303 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 14:13:05,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:13:05,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:13:05,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:13:05,736 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:13:05,736 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 14:13:07,310 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:13:07,311 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 14:13:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:13:07,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:13:08,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:08,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16909188] [2021-11-19 14:13:08,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16909188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:13:08,126 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:13:08,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:13:08,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169229874] [2021-11-19 14:13:08,126 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:08,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:13:08,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:08,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:13:08,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:13:08,127 INFO L87 Difference]: Start difference. First operand 3514 states and 5039 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 14:13:10,156 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:13:12,170 WARN L515 Checker$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 14:13:24,844 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:13:26,466 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:13:27,803 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:13:29,814 WARN L515 Checker$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 14:13:30,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:13:31,994 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:13:34,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:13:35,970 WARN L515 Checker$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 14:13:37,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:13:41,305 WARN L515 Checker$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 14:13:43,279 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:13:45,023 WARN L515 Checker$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 14:13:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:45,172 INFO L93 Difference]: Finished difference Result 7495 states and 10717 transitions. [2021-11-19 14:13:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:13:45,174 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 154 [2021-11-19 14:13:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:45,180 INFO L225 Difference]: With dead ends: 7495 [2021-11-19 14:13:45,181 INFO L226 Difference]: Without dead ends: 4018 [2021-11-19 14:13:45,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 300 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 14:13:45,185 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 238 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 70 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:45,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 592 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 536 Invalid, 3 Unknown, 0 Unchecked, 36.7s Time] [2021-11-19 14:13:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4018 states. [2021-11-19 14:13:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4018 to 3514. [2021-11-19 14:13:45,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3513 states have (on average 1.4161685169370908) internal successors, (4975), 3513 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states 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 14:13:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 4975 transitions. [2021-11-19 14:13:45,432 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 4975 transitions. Word has length 154 [2021-11-19 14:13:45,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:45,432 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 4975 transitions. [2021-11-19 14:13:45,433 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 14:13:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 4975 transitions. [2021-11-19 14:13:45,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-19 14:13:45,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:45,438 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:45,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:45,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:13:45,657 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:13:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1231220461, now seen corresponding path program 1 times [2021-11-19 14:13:45,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:45,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77254665] [2021-11-19 14:13:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:13:45,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:45,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:45,660 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:45,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc2fc1d-9685-48ae-9371-7e0aa5b19ea4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:13:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:46,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:13:46,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:13:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:13:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:13:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:13:46,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:13:46,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:13:46,548 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:13:46,549 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 14:13:46,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:13:46,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:13:46,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:13:47,006 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:13:47,007 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 14:13:48,555 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:13:48,555 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 14:13:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:13:48,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:13:49,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:13:49,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77254665] [2021-11-19 14:13:49,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77254665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:13:49,404 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:13:49,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:13:49,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681111475] [2021-11-19 14:13:49,404 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:49,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:13:49,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:49,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:13:49,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:13:49,405 INFO L87 Difference]: Start difference. First operand 3514 states and 4975 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 14:13:51,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:13:57,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []