./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/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_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/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_a13d55b2-a53a-4643-a316-c131f625c000/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 f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:29:33,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:29:33,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:29:33,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:29:33,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:29:33,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:29:33,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:29:33,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:29:33,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:29:33,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:29:33,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:29:33,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:29:33,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:29:33,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:29:33,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:29:33,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:29:33,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:29:33,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:29:33,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:29:33,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:29:33,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:29:33,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:29:33,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:29:33,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:29:33,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:29:33,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:29:33,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:29:33,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:29:33,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:29:33,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:29:33,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:29:33,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:29:33,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:29:33,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:29:33,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:29:33,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:29:33,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:29:33,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:29:33,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:29:33,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:29:33,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:29:33,542 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:29:33,594 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:29:33,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:29:33,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:29:33,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:29:33,597 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:29:33,597 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:29:33,598 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:29:33,598 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:29:33,606 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:29:33,606 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:29:33,608 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:29:33,608 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:29:33,608 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:29:33,609 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:29:33,609 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:29:33,609 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:29:33,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:29:33,611 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:29:33,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:29:33,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:29:33,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:29:33,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:29:33,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:29:33,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:29:33,613 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:29:33,613 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:29:33,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:29:33,614 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:29:33,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:29:33,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:29:33,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:29:33,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:33,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:29:33,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:29:33,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:29:33,634 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:29:33,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:29:33,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:29:33,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:29:33,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:29:33,635 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_a13d55b2-a53a-4643-a316-c131f625c000/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2021-11-19 14:29:34,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:29:34,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:29:34,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:29:34,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:29:34,081 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:29:34,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-19 14:29:34,171 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/data/770b9a87b/e7fba8e91d044070960122a88273bbec/FLAG97c27d96a [2021-11-19 14:29:34,995 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:29:34,995 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-19 14:29:35,032 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/data/770b9a87b/e7fba8e91d044070960122a88273bbec/FLAG97c27d96a [2021-11-19 14:29:35,068 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/data/770b9a87b/e7fba8e91d044070960122a88273bbec [2021-11-19 14:29:35,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:29:35,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:29:35,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:35,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:29:35,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:29:35,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:35" (1/1) ... [2021-11-19 14:29:35,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b90e07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:35, skipping insertion in model container [2021-11-19 14:29:35,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:35" (1/1) ... [2021-11-19 14:29:35,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:29:35,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:35,638 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_a13d55b2-a53a-4643-a316-c131f625c000/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-19 14:29:35,667 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:35,701 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 14:29:35,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@58d518b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:35, skipping insertion in model container [2021-11-19 14:29:35,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:35,702 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:29:35,706 INFO L158 Benchmark]: Toolchain (without parser) took 630.29ms. Allocated memory is still 94.4MB. Free memory was 71.4MB in the beginning and 50.6MB in the end (delta: 20.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-19 14:29:35,708 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 94.4MB. Free memory was 68.7MB in the beginning and 68.6MB in the end (delta: 48.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:29:35,710 INFO L158 Benchmark]: CACSL2BoogieTranslator took 627.21ms. Allocated memory is still 94.4MB. Free memory was 71.2MB in the beginning and 50.6MB in the end (delta: 20.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-19 14:29:35,712 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 94.4MB. Free memory was 68.7MB in the beginning and 68.6MB in the end (delta: 48.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 627.21ms. Allocated memory is still 94.4MB. Free memory was 71.2MB in the beginning and 50.6MB in the end (delta: 20.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/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_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/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_a13d55b2-a53a-4643-a316-c131f625c000/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 f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:29:38,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:29:38,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:29:38,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:29:38,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:29:38,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:29:38,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:29:38,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:29:38,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:29:38,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:29:38,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:29:38,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:29:38,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:29:38,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:29:38,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:29:38,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:29:38,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:29:38,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:29:38,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:29:38,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:29:38,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:29:38,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:29:38,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:29:38,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:29:38,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:29:38,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:29:38,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:29:38,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:29:38,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:29:38,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:29:38,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:29:38,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:29:38,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:29:38,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:29:38,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:29:38,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:29:38,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:29:38,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:29:38,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:29:38,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:29:38,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:29:38,756 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:29:38,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:29:38,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:29:38,811 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:29:38,812 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:29:38,812 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:29:38,812 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:29:38,812 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:29:38,813 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:29:38,813 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:29:38,813 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:29:38,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:29:38,821 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:29:38,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:29:38,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:29:38,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:29:38,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:29:38,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:29:38,822 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:29:38,823 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:29:38,823 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:29:38,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:29:38,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:29:38,824 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:29:38,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:29:38,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:29:38,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:29:38,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:29:38,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:38,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:29:38,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:29:38,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:29:38,826 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:29:38,827 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:29:38,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:29:38,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:29:38,828 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:29:38,828 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_a13d55b2-a53a-4643-a316-c131f625c000/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2021-11-19 14:29:39,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:29:39,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:29:39,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:29:39,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:29:39,363 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:29:39,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-19 14:29:39,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/data/8f8a893b3/77268041ead1482c875b3804fba707dc/FLAGecf61bf92 [2021-11-19 14:29:40,358 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:29:40,359 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-19 14:29:40,395 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/data/8f8a893b3/77268041ead1482c875b3804fba707dc/FLAGecf61bf92 [2021-11-19 14:29:40,494 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/data/8f8a893b3/77268041ead1482c875b3804fba707dc [2021-11-19 14:29:40,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:29:40,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:29:40,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:40,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:29:40,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:29:40,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:40" (1/1) ... [2021-11-19 14:29:40,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c1d9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:40, skipping insertion in model container [2021-11-19 14:29:40,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:40" (1/1) ... [2021-11-19 14:29:40,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:29:40,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:41,263 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_a13d55b2-a53a-4643-a316-c131f625c000/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-19 14:29:41,275 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:41,297 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:29:41,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:41,527 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_a13d55b2-a53a-4643-a316-c131f625c000/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-19 14:29:41,533 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:41,542 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:29:41,689 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_a13d55b2-a53a-4643-a316-c131f625c000/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-19 14:29:41,693 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:41,735 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:29:41,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41 WrapperNode [2021-11-19 14:29:41,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:41,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:29:41,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:29:41,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:29:41,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41" (1/1) ... [2021-11-19 14:29:41,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41" (1/1) ... [2021-11-19 14:29:41,883 INFO L137 Inliner]: procedures = 36, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 761 [2021-11-19 14:29:41,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:29:41,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:29:41,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:29:41,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:29:41,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41" (1/1) ... [2021-11-19 14:29:41,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41" (1/1) ... [2021-11-19 14:29:41,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41" (1/1) ... [2021-11-19 14:29:41,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41" (1/1) ... [2021-11-19 14:29:41,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41" (1/1) ... [2021-11-19 14:29:42,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41" (1/1) ... [2021-11-19 14:29:42,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41" (1/1) ... [2021-11-19 14:29:42,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:29:42,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:29:42,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:29:42,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:29:42,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41" (1/1) ... [2021-11-19 14:29:42,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:42,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:42,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:29:42,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:29:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:29:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:29:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:29:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:29:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:29:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:29:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:29:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:29:42,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:29:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:29:42,451 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:29:42,453 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:29:42,476 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:29:53,095 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 14:29:53,096 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 14:29:53,096 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:29:53,107 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:29:53,107 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:29:53,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:29:53 BoogieIcfgContainer [2021-11-19 14:29:53,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:29:53,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:29:53,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:29:53,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:29:53,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:29:40" (1/3) ... [2021-11-19 14:29:53,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6824b7e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:29:53, skipping insertion in model container [2021-11-19 14:29:53,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:41" (2/3) ... [2021-11-19 14:29:53,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6824b7e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:29:53, skipping insertion in model container [2021-11-19 14:29:53,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:29:53" (3/3) ... [2021-11-19 14:29:53,120 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-1.c [2021-11-19 14:29:53,127 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:29:53,127 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:29:53,182 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:29:53,190 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 14:29:53,190 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:29:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 14:29:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 14:29:53,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:53,242 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] [2021-11-19 14:29:53,243 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:53,250 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-11-19 14:29:53,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:53,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265847457] [2021-11-19 14:29:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:53,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:53,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:53,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:53,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:29:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:29:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:53,969 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 14:29:53,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:54,263 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 14:29:54,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:54,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265847457] [2021-11-19 14:29:54,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265847457] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:54,265 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:54,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:29:54,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275594246] [2021-11-19 14:29:54,268 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:54,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:29:54,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:54,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:29:54,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:54,326 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 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 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 14:29:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:54,624 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-19 14:29:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:29:54,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 37 [2021-11-19 14:29:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:54,658 INFO L225 Difference]: With dead ends: 566 [2021-11-19 14:29:54,659 INFO L226 Difference]: Without dead ends: 387 [2021-11-19 14:29:54,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 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 14:29:54,673 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 402 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:54,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 670 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-19 14:29:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-19 14:29:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 14:29:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-19 14:29:54,795 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-19 14:29:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:54,795 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-19 14:29:54,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 14:29:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-19 14:29:54,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:29:54,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:54,808 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 14:29:54,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:55,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:55,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:55,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:55,036 INFO L85 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-11-19 14:29:55,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:55,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499706209] [2021-11-19 14:29:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:55,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:55,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:55,041 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:55,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:29:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:55,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:29:55,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:55,654 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 14:29:55,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:55,967 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 14:29:55,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:55,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499706209] [2021-11-19 14:29:55,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499706209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:55,968 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:55,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:29:55,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974435188] [2021-11-19 14:29:55,969 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:55,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:29:55,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:29:55,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:55,971 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 14:29:57,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:57,564 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-19 14:29:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:29:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 14:29:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:57,574 INFO L225 Difference]: With dead ends: 882 [2021-11-19 14:29:57,574 INFO L226 Difference]: Without dead ends: 631 [2021-11-19 14:29:57,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:57,579 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 305 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:57,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 722 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:29:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-19 14:29:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-19 14:29:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.5222929936305734) internal successors, (956), 628 states have internal predecessors, (956), 0 states have call successors, (0), 0 states 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 14:29:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-19 14:29:57,620 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-19 14:29:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:57,621 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-19 14:29:57,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 14:29:57,622 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-19 14:29:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:29:57,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:57,630 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:57,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:57,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:57,845 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:57,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1749353389, now seen corresponding path program 1 times [2021-11-19 14:29:57,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:57,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341209413] [2021-11-19 14:29:57,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:57,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:57,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:57,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:57,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:29:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:58,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:29:58,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:29:58,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:29:59,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:59,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341209413] [2021-11-19 14:29:59,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341209413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:59,125 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:59,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:29:59,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908715006] [2021-11-19 14:29:59,125 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:59,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:29:59,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:29:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:59,130 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 14:29:59,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:59,792 INFO L93 Difference]: Finished difference Result 1244 states and 1900 transitions. [2021-11-19 14:29:59,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:29:59,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-19 14:29:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:59,802 INFO L225 Difference]: With dead ends: 1244 [2021-11-19 14:29:59,802 INFO L226 Difference]: Without dead ends: 749 [2021-11-19 14:29:59,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:59,814 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 137 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:59,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 569 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:29:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-19 14:29:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2021-11-19 14:29:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.518716577540107) internal successors, (1136), 748 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 14:29:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1136 transitions. [2021-11-19 14:29:59,861 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1136 transitions. Word has length 119 [2021-11-19 14:29:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:59,863 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1136 transitions. [2021-11-19 14:29:59,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 14:29:59,865 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1136 transitions. [2021-11-19 14:29:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 14:29:59,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:59,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:29:59,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:00,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:00,087 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:00,088 INFO L85 PathProgramCache]: Analyzing trace with hash 433077792, now seen corresponding path program 1 times [2021-11-19 14:30:00,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:00,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953395999] [2021-11-19 14:30:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:00,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:00,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:00,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:00,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:30:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:00,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:30:00,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:30:01,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:30:01,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:01,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953395999] [2021-11-19 14:30:01,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953395999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:01,511 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:01,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:30:01,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512840345] [2021-11-19 14:30:01,512 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:01,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:30:01,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:01,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:30:01,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:30:01,514 INFO L87 Difference]: Start difference. First operand 749 states and 1136 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:30:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:02,407 INFO L93 Difference]: Finished difference Result 1611 states and 2457 transitions. [2021-11-19 14:30:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:30:02,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-19 14:30:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:02,420 INFO L225 Difference]: With dead ends: 1611 [2021-11-19 14:30:02,420 INFO L226 Difference]: Without dead ends: 996 [2021-11-19 14:30:02,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 282 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 14:30:02,426 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 296 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:02,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 731 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:30:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-19 14:30:02,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 996. [2021-11-19 14:30:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.5155778894472363) internal successors, (1508), 995 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states 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 14:30:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1508 transitions. [2021-11-19 14:30:02,485 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1508 transitions. Word has length 143 [2021-11-19 14:30:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:02,490 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1508 transitions. [2021-11-19 14:30:02,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:30:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1508 transitions. [2021-11-19 14:30:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 14:30:02,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:02,496 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:02,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:02,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:02,714 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1349783187, now seen corresponding path program 1 times [2021-11-19 14:30:02,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:02,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357329033] [2021-11-19 14:30:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:02,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:02,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:02,724 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:02,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:30:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:03,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:30:03,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:30:03,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:30:04,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:04,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357329033] [2021-11-19 14:30:04,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357329033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:04,159 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:04,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:30:04,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665773288] [2021-11-19 14:30:04,160 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:04,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:30:04,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:30:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:30:04,162 INFO L87 Difference]: Start difference. First operand 996 states and 1508 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 14:30:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:04,834 INFO L93 Difference]: Finished difference Result 2102 states and 3195 transitions. [2021-11-19 14:30:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:30:04,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 165 [2021-11-19 14:30:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:04,846 INFO L225 Difference]: With dead ends: 2102 [2021-11-19 14:30:04,846 INFO L226 Difference]: Without dead ends: 1240 [2021-11-19 14:30:04,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 326 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 14:30:04,849 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 295 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:04,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 728 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:30:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-19 14:30:04,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2021-11-19 14:30:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 1.5125100887812752) internal successors, (1874), 1239 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states 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 14:30:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1874 transitions. [2021-11-19 14:30:04,913 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1874 transitions. Word has length 165 [2021-11-19 14:30:04,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:04,913 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1874 transitions. [2021-11-19 14:30:04,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 14:30:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1874 transitions. [2021-11-19 14:30:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-19 14:30:04,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:04,920 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:04,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:05,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:05,135 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:05,136 INFO L85 PathProgramCache]: Analyzing trace with hash -381805375, now seen corresponding path program 1 times [2021-11-19 14:30:05,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:05,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316322329] [2021-11-19 14:30:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:05,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:05,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:05,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:05,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:30:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:06,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:30:06,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:06,320 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 14:30:06,336 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 14:30:06,436 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:06,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 14:30:06,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:06,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 14:30:06,490 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 14:30:07,129 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-19 14:30:07,130 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 14:30:07,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:07,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 14:30:07,271 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:07,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 14:30:07,297 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 14:30:07,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,476 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 14:30:07,619 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-19 14:30:07,620 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 14:30:07,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:07,690 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 14:30:07,732 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 14:30:07,738 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 14:30:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 14:30:08,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:08,864 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:08,870 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-19 14:30:08,876 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:08,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-19 14:30:09,050 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:09,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 14:30:09,061 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:09,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-19 14:30:09,079 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:09,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-19 14:30:09,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:09,124 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-19 14:30:09,150 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:09,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-19 14:30:09,187 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:30:09,193 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-19 14:30:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 14:30:09,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:09,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316322329] [2021-11-19 14:30:09,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316322329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:09,809 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:09,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:30:09,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783921533] [2021-11-19 14:30:09,810 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:09,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:30:09,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:09,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:30:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:30:09,812 INFO L87 Difference]: Start difference. First operand 1240 states and 1874 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 14:30:11,848 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:13,858 WARN L515 Checker$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 14:30:15,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:24,998 WARN L515 Checker$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 14:30:26,081 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:28,497 WARN L515 Checker$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 14:30:29,981 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:31,092 WARN L515 Checker$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 14:30:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:32,156 INFO L93 Difference]: Finished difference Result 2477 states and 3744 transitions. [2021-11-19 14:30:32,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:32,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 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 172 [2021-11-19 14:30:32,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:32,167 INFO L225 Difference]: With dead ends: 2477 [2021-11-19 14:30:32,167 INFO L226 Difference]: Without dead ends: 1240 [2021-11-19 14:30:32,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 335 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 14:30:32,171 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:32,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 931 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 265 Invalid, 4 Unknown, 60 Unchecked, 22.2s Time] [2021-11-19 14:30:32,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-19 14:30:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2021-11-19 14:30:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 1.5117029862792575) internal successors, (1873), 1239 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states 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 14:30:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1873 transitions. [2021-11-19 14:30:32,224 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1873 transitions. Word has length 172 [2021-11-19 14:30:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:32,225 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1873 transitions. [2021-11-19 14:30:32,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 14:30:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1873 transitions. [2021-11-19 14:30:32,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-19 14:30:32,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:32,230 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:32,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:32,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:32,455 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:32,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1884903681, now seen corresponding path program 1 times [2021-11-19 14:30:32,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:32,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683476561] [2021-11-19 14:30:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:32,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:32,457 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:32,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:30:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:33,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:30:33,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:33,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:33,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:33,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:33,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:33,681 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:30:33,681 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 14:30:33,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:33,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:33,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:34,236 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:30:34,236 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 14:30:35,719 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:30:35,720 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 14:30:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 14:30:36,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 14:30:36,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:36,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683476561] [2021-11-19 14:30:36,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683476561] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:36,625 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:36,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:30:36,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981805802] [2021-11-19 14:30:36,625 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:36,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:30:36,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:36,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:30:36,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:36,626 INFO L87 Difference]: Start difference. First operand 1240 states and 1873 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 14:30:38,654 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:40,661 WARN L515 Checker$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 14:30:42,669 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:47,292 WARN L515 Checker$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 14:30:59,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:01,165 WARN L515 Checker$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 14:31:03,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:09,126 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:13,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:16,247 WARN L515 Checker$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 14:31:18,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:20,698 WARN L515 Checker$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 14:31:26,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:33,243 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:40,058 INFO L93 Difference]: Finished difference Result 4654 states and 7069 transitions. [2021-11-19 14:31:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:31:40,060 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 172 [2021-11-19 14:31:40,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:40,085 INFO L225 Difference]: With dead ends: 4654 [2021-11-19 14:31:40,085 INFO L226 Difference]: Without dead ends: 3424 [2021-11-19 14:31:40,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:31:40,089 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 259 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 74 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:40,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 892 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 848 Invalid, 7 Unknown, 0 Unchecked, 63.1s Time] [2021-11-19 14:31:40,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-11-19 14:31:40,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 1489. [2021-11-19 14:31:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 1.5470430107526882) internal successors, (2302), 1488 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states 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 14:31:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2302 transitions. [2021-11-19 14:31:40,201 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2302 transitions. Word has length 172 [2021-11-19 14:31:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:40,201 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 2302 transitions. [2021-11-19 14:31:40,202 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 14:31:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2302 transitions. [2021-11-19 14:31:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-19 14:31:40,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:40,207 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:40,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:40,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:40,429 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:40,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1462011649, now seen corresponding path program 1 times [2021-11-19 14:31:40,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:40,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551422513] [2021-11-19 14:31:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:40,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:40,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:40,433 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:40,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:31:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:41,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:31:41,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:41,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:41,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:31:41,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:31:41,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:31:41,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:31:41,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:31:42,086 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:31:42,087 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 14:31:43,610 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:31:43,611 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 14:31:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:31:43,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:31:44,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:44,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551422513] [2021-11-19 14:31:44,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551422513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:44,258 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:44,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:31:44,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103685474] [2021-11-19 14:31:44,259 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:44,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:44,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:44,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:44,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:31:44,261 INFO L87 Difference]: Start difference. First operand 1489 states and 2302 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 14:31:46,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:50,973 WARN L515 Checker$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 14:31:54,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:02,955 INFO L93 Difference]: Finished difference Result 3604 states and 5571 transitions. [2021-11-19 14:32:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:32:02,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 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 172 [2021-11-19 14:32:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:02,976 INFO L225 Difference]: With dead ends: 3604 [2021-11-19 14:32:02,976 INFO L226 Difference]: Without dead ends: 2125 [2021-11-19 14:32:02,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 338 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 14:32:02,979 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 110 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:02,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 615 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 18.5s Time] [2021-11-19 14:32:02,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-11-19 14:32:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1769. [2021-11-19 14:32:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 1.579185520361991) internal successors, (2792), 1768 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:32:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2792 transitions. [2021-11-19 14:32:03,096 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2792 transitions. Word has length 172 [2021-11-19 14:32:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:03,096 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2792 transitions. [2021-11-19 14:32:03,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:32:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2792 transitions. [2021-11-19 14:32:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-19 14:32:03,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:03,102 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:03,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:03,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:03,324 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:03,325 INFO L85 PathProgramCache]: Analyzing trace with hash 991422329, now seen corresponding path program 1 times [2021-11-19 14:32:03,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:03,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811638116] [2021-11-19 14:32:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:03,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:03,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:03,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:03,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:32:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:04,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:32:04,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:04,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:04,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:04,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:04,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:04,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:04,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:04,748 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:32:04,749 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 14:32:05,508 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:32:05,508 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 14:32:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:32:05,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:32:06,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:06,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811638116] [2021-11-19 14:32:06,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811638116] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:06,160 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:06,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:32:06,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980329224] [2021-11-19 14:32:06,160 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:06,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:32:06,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:32:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:32:06,161 INFO L87 Difference]: Start difference. First operand 1769 states and 2792 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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 14:32:08,183 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:10,191 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:14,961 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:16,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:20,968 WARN L515 Checker$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 14:32:26,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:27,947 WARN L515 Checker$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 14:32:32,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:34,968 WARN L515 Checker$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 14:32:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:40,582 INFO L93 Difference]: Finished difference Result 5243 states and 8185 transitions. [2021-11-19 14:32:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:32:40,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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 185 [2021-11-19 14:32:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:40,610 INFO L225 Difference]: With dead ends: 5243 [2021-11-19 14:32:40,610 INFO L226 Difference]: Without dead ends: 3484 [2021-11-19 14:32:40,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:32:40,614 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 210 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:40,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 564 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 482 Invalid, 2 Unknown, 0 Unchecked, 34.2s Time] [2021-11-19 14:32:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3484 states. [2021-11-19 14:32:40,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3484 to 2073. [2021-11-19 14:32:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 1.5810810810810811) internal successors, (3276), 2072 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:32:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3276 transitions. [2021-11-19 14:32:40,773 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3276 transitions. Word has length 185 [2021-11-19 14:32:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:40,773 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 3276 transitions. [2021-11-19 14:32:40,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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 14:32:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3276 transitions. [2021-11-19 14:32:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-19 14:32:40,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:40,786 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:40,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:40,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:40,999 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash -503738714, now seen corresponding path program 1 times [2021-11-19 14:32:41,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:41,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912007928] [2021-11-19 14:32:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:41,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:41,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:41,002 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:41,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:32:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:42,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:32:42,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:42,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:42,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:42,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:42,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:42,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:42,663 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:32:42,663 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 14:32:43,104 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:32:43,105 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 14:32:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:32:43,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:32:43,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:43,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912007928] [2021-11-19 14:32:43,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912007928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:43,706 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:43,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:32:43,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011464256] [2021-11-19 14:32:43,706 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:43,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:32:43,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:32:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:32:43,707 INFO L87 Difference]: Start difference. First operand 2073 states and 3276 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:32:45,728 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:47,738 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:48,769 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:53,654 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:57,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:01,794 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:02,847 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:04,116 WARN L515 Checker$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 14:33:07,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:09,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:11,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:12,979 WARN L515 Checker$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 14:33:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:24,933 INFO L93 Difference]: Finished difference Result 5687 states and 8880 transitions. [2021-11-19 14:33:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:33:24,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 186 [2021-11-19 14:33:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:24,955 INFO L225 Difference]: With dead ends: 5687 [2021-11-19 14:33:24,956 INFO L226 Difference]: Without dead ends: 3624 [2021-11-19 14:33:24,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:33:24,960 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 219 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 67 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:24,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 687 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 608 Invalid, 4 Unknown, 0 Unchecked, 41.0s Time] [2021-11-19 14:33:24,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2021-11-19 14:33:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 2183. [2021-11-19 14:33:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 1.5614115490375802) internal successors, (3407), 2182 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:33:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3407 transitions. [2021-11-19 14:33:25,126 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3407 transitions. Word has length 186 [2021-11-19 14:33:25,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:25,129 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 3407 transitions. [2021-11-19 14:33:25,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:33:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3407 transitions. [2021-11-19 14:33:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-19 14:33:25,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:25,135 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:25,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:25,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:25,351 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:25,351 INFO L85 PathProgramCache]: Analyzing trace with hash 790677906, now seen corresponding path program 1 times [2021-11-19 14:33:25,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:25,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844065102] [2021-11-19 14:33:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:25,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:25,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:25,354 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:25,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:33:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:26,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:33:26,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:26,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:33:26,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:33:26,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:33:26,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:33:26,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:33:26,833 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:33:26,833 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 14:33:27,264 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:33:27,264 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 14:33:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:33:27,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:33:27,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:27,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844065102] [2021-11-19 14:33:27,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844065102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:27,895 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:27,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:33:27,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902903008] [2021-11-19 14:33:27,895 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:27,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:33:27,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:27,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:33:27,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:33:27,897 INFO L87 Difference]: Start difference. First operand 2183 states and 3407 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:33:29,921 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:31,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:35,140 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:37,525 WARN L515 Checker$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 14:33:39,010 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:41,025 WARN L515 Checker$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 14:33:48,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:56,055 WARN L515 Checker$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 14:34:08,845 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 14:34:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:09,066 INFO L93 Difference]: Finished difference Result 5917 states and 9142 transitions. [2021-11-19 14:34:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:34:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-19 14:34:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:09,085 INFO L225 Difference]: With dead ends: 5917 [2021-11-19 14:34:09,085 INFO L226 Difference]: Without dead ends: 3744 [2021-11-19 14:34:09,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:34:09,090 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 216 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 64 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:09,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 775 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 620 Invalid, 4 Unknown, 0 Unchecked, 40.8s Time] [2021-11-19 14:34:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3744 states. [2021-11-19 14:34:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3744 to 2303. [2021-11-19 14:34:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 1.5412684622067767) internal successors, (3548), 2302 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 3548 transitions. [2021-11-19 14:34:09,296 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 3548 transitions. Word has length 186 [2021-11-19 14:34:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:09,297 INFO L470 AbstractCegarLoop]: Abstraction has 2303 states and 3548 transitions. [2021-11-19 14:34:09,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 3548 transitions. [2021-11-19 14:34:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-19 14:34:09,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:09,303 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:09,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:09,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:09,529 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2111383387, now seen corresponding path program 1 times [2021-11-19 14:34:09,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:09,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892908983] [2021-11-19 14:34:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:09,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:09,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:09,534 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:09,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:34:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:10,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:10,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:10,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:10,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:10,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:10,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:10,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:11,223 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:34:11,223 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 14:34:12,168 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:34:12,168 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 14:34:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:34:12,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:34:12,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:12,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892908983] [2021-11-19 14:34:12,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892908983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:12,920 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:12,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:34:12,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509849650] [2021-11-19 14:34:12,920 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:12,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:34:12,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:34:12,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:12,922 INFO L87 Difference]: Start difference. First operand 2303 states and 3548 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 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 14:34:14,946 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:18,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:21,181 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:24,537 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:28,742 WARN L515 Checker$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 14:34:30,501 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:32,516 WARN L515 Checker$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 14:34:49,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:49,483 INFO L93 Difference]: Finished difference Result 5897 states and 9004 transitions. [2021-11-19 14:34:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:34:49,484 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 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 186 [2021-11-19 14:34:49,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:49,502 INFO L225 Difference]: With dead ends: 5897 [2021-11-19 14:34:49,502 INFO L226 Difference]: Without dead ends: 3604 [2021-11-19 14:34:49,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:34:49,505 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 203 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:49,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 518 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 463 Invalid, 2 Unknown, 0 Unchecked, 36.3s Time] [2021-11-19 14:34:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-11-19 14:34:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 2321. [2021-11-19 14:34:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 1.5323275862068966) internal successors, (3555), 2320 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3555 transitions. [2021-11-19 14:34:49,678 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3555 transitions. Word has length 186 [2021-11-19 14:34:49,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:49,679 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 3555 transitions. [2021-11-19 14:34:49,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 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 14:34:49,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3555 transitions. [2021-11-19 14:34:49,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-19 14:34:49,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:49,685 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:49,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:49,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:49,899 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:49,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1645926757, now seen corresponding path program 1 times [2021-11-19 14:34:49,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:49,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163698564] [2021-11-19 14:34:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:49,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:49,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:49,902 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:49,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:34:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:50,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:50,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:50,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:50,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:50,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:50,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:50,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:51,246 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:34:51,246 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 14:34:52,097 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:34:52,097 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 14:34:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:34:52,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:34:52,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:52,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163698564] [2021-11-19 14:34:52,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163698564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:52,850 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:52,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:34:52,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608526514] [2021-11-19 14:34:52,850 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:52,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:34:52,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:34:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:52,852 INFO L87 Difference]: Start difference. First operand 2321 states and 3555 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:54,878 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:56,322 WARN L515 Checker$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 14:35:02,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:05,503 WARN L515 Checker$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 14:35:08,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:11,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:15,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:16,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:18,633 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:23,515 WARN L515 Checker$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 14:35:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:34,370 INFO L93 Difference]: Finished difference Result 5895 states and 8962 transitions. [2021-11-19 14:35:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:35:34,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 186 [2021-11-19 14:35:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:34,385 INFO L225 Difference]: With dead ends: 5895 [2021-11-19 14:35:34,386 INFO L226 Difference]: Without dead ends: 3584 [2021-11-19 14:35:34,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:35:34,390 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 203 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:34,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 669 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 601 Invalid, 1 Unknown, 0 Unchecked, 41.2s Time] [2021-11-19 14:35:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-11-19 14:35:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2321. [2021-11-19 14:35:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 1.5198275862068966) internal successors, (3526), 2320 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:35:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3526 transitions. [2021-11-19 14:35:34,556 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3526 transitions. Word has length 186 [2021-11-19 14:35:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:34,557 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 3526 transitions. [2021-11-19 14:35:34,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:35:34,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3526 transitions. [2021-11-19 14:35:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-19 14:35:34,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:34,562 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:34,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:34,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:34,778 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:34,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:34,779 INFO L85 PathProgramCache]: Analyzing trace with hash -855064592, now seen corresponding path program 1 times [2021-11-19 14:35:34,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:34,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451593264] [2021-11-19 14:35:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:34,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:34,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:34,783 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:34,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:35:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:35,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:35:35,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:36,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:36,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:36,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:36,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:36,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:36,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:36,671 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:35:36,671 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 14:35:37,222 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:35:37,222 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 14:35:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:35:37,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:35:37,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:37,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451593264] [2021-11-19 14:35:37,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451593264] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:37,894 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:35:37,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:35:37,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300401333] [2021-11-19 14:35:37,894 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:37,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:35:37,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:37,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:35:37,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:35:37,895 INFO L87 Difference]: Start difference. First operand 2321 states and 3526 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 14:35:39,919 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:41,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:44,918 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:51,327 WARN L515 Checker$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 14:35:53,841 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:55,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:12,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:12,267 INFO L93 Difference]: Finished difference Result 6111 states and 9246 transitions. [2021-11-19 14:36:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:36:12,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 187 [2021-11-19 14:36:12,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:12,276 INFO L225 Difference]: With dead ends: 6111 [2021-11-19 14:36:12,276 INFO L226 Difference]: Without dead ends: 3800 [2021-11-19 14:36:12,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:36:12,279 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 209 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 64 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:12,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 594 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 470 Invalid, 3 Unknown, 0 Unchecked, 34.1s Time] [2021-11-19 14:36:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3800 states. [2021-11-19 14:36:12,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3800 to 2438. [2021-11-19 14:36:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 2437 states have (on average 1.5047189167008617) internal successors, (3667), 2437 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:36:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 3667 transitions. [2021-11-19 14:36:12,471 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 3667 transitions. Word has length 187 [2021-11-19 14:36:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:12,471 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 3667 transitions. [2021-11-19 14:36:12,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 14:36:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 3667 transitions. [2021-11-19 14:36:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-19 14:36:12,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:12,478 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:12,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:12,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:12,691 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:12,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:12,692 INFO L85 PathProgramCache]: Analyzing trace with hash -711546899, now seen corresponding path program 1 times [2021-11-19 14:36:12,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:12,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15116185] [2021-11-19 14:36:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:12,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:12,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:12,695 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:12,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:36:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:13,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:36:13,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:13,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:13,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:13,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:13,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:14,191 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:36:14,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-19 14:36:14,836 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:36:14,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-19 14:36:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:36:15,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:36:15,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:15,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15116185] [2021-11-19 14:36:15,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15116185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:15,620 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:36:15,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:36:15,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530788167] [2021-11-19 14:36:15,620 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:15,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:36:15,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:36:15,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:36:15,622 INFO L87 Difference]: Start difference. First operand 2438 states and 3667 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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 14:36:17,648 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:19,926 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:30,132 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:31,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:33,251 WARN L515 Checker$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 14:36:49,861 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 14:36:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:50,947 INFO L93 Difference]: Finished difference Result 6228 states and 9348 transitions. [2021-11-19 14:36:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:36:50,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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 188 [2021-11-19 14:36:50,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:50,954 INFO L225 Difference]: With dead ends: 6228 [2021-11-19 14:36:50,954 INFO L226 Difference]: Without dead ends: 3800 [2021-11-19 14:36:50,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:36:50,957 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 205 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:50,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 772 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 612 Invalid, 1 Unknown, 0 Unchecked, 35.0s Time] [2021-11-19 14:36:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3800 states. [2021-11-19 14:36:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3800 to 2447. [2021-11-19 14:36:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2446 states have (on average 1.4905968928863451) internal successors, (3646), 2446 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:36:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3646 transitions. [2021-11-19 14:36:51,114 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3646 transitions. Word has length 188 [2021-11-19 14:36:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:51,115 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 3646 transitions. [2021-11-19 14:36:51,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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 14:36:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3646 transitions. [2021-11-19 14:36:51,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-19 14:36:51,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:51,121 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:51,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 14:36:51,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:51,335 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:51,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash -935538133, now seen corresponding path program 1 times [2021-11-19 14:36:51,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:51,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826342761] [2021-11-19 14:36:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:51,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:51,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:51,338 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:51,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:36:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:52,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:36:52,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:52,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:52,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:52,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:52,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:52,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:52,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:52,688 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:36:52,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-19 14:36:53,252 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:36:53,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-19 14:36:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:36:53,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:36:53,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:53,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826342761] [2021-11-19 14:36:53,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826342761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:53,896 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:36:53,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:36:53,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258433041] [2021-11-19 14:36:53,896 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:53,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:36:53,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:53,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:36:53,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:36:53,897 INFO L87 Difference]: Start difference. First operand 2447 states and 3646 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 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 14:36:55,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:03,429 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:07,353 WARN L515 Checker$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 14:37:09,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:13,852 WARN L515 Checker$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 14:37:15,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:18,527 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:23,054 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 14:37:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:25,858 INFO L93 Difference]: Finished difference Result 6047 states and 9014 transitions. [2021-11-19 14:37:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:37:25,859 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 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 189 [2021-11-19 14:37:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:25,865 INFO L225 Difference]: With dead ends: 6047 [2021-11-19 14:37:25,865 INFO L226 Difference]: Without dead ends: 3610 [2021-11-19 14:37:25,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:37:25,868 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 196 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 63 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:25,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 509 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 443 Invalid, 2 Unknown, 0 Unchecked, 31.7s Time] [2021-11-19 14:37:25,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-11-19 14:37:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2447. [2021-11-19 14:37:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2446 states have (on average 1.474652493867539) internal successors, (3607), 2446 states have internal predecessors, (3607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:37:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3607 transitions. [2021-11-19 14:37:26,047 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3607 transitions. Word has length 189 [2021-11-19 14:37:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:26,047 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 3607 transitions. [2021-11-19 14:37:26,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 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 14:37:26,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3607 transitions. [2021-11-19 14:37:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-19 14:37:26,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:26,054 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:26,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:26,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:26,284 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:26,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1463772801, now seen corresponding path program 1 times [2021-11-19 14:37:26,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:26,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053718668] [2021-11-19 14:37:26,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:26,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:26,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:26,287 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:26,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:37:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:27,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:37:27,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:27,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:27,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:27,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:27,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:27,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:27,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:27,584 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:37:27,585 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 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-19 14:37:28,392 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:37:28,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-19 14:37:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:37:28,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:37:29,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:29,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053718668] [2021-11-19 14:37:29,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053718668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:29,152 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:29,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:37:29,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321146968] [2021-11-19 14:37:29,152 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:29,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:37:29,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:37:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:37:29,154 INFO L87 Difference]: Start difference. First operand 2447 states and 3607 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:37:31,182 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:32,973 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:36,433 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:38,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:41,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:45,771 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:50,532 WARN L515 Checker$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 14:37:52,543 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:54,556 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:57,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:58,832 WARN L515 Checker$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 14:38:00,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:04,484 WARN L515 Checker$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 14:38:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:06,859 INFO L93 Difference]: Finished difference Result 6041 states and 8916 transitions. [2021-11-19 14:38:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:38:06,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-19 14:38:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:06,884 INFO L225 Difference]: With dead ends: 6041 [2021-11-19 14:38:06,884 INFO L226 Difference]: Without dead ends: 3850 [2021-11-19 14:38:06,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:38:06,888 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 178 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 43 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:06,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 778 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 456 Invalid, 3 Unknown, 0 Unchecked, 37.4s Time] [2021-11-19 14:38:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2021-11-19 14:38:07,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 2646. [2021-11-19 14:38:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2645 states have (on average 1.4540642722117203) internal successors, (3846), 2645 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:38:07,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3846 transitions. [2021-11-19 14:38:07,108 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3846 transitions. Word has length 189 [2021-11-19 14:38:07,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:07,109 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 3846 transitions. [2021-11-19 14:38:07,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:38:07,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3846 transitions. [2021-11-19 14:38:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 14:38:07,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:07,115 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:38:07,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:07,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:38:07,339 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:38:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:07,340 INFO L85 PathProgramCache]: Analyzing trace with hash -70761122, now seen corresponding path program 1 times [2021-11-19 14:38:07,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:07,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562652829] [2021-11-19 14:38:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:07,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:07,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:07,342 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:07,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:38:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:08,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:38:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:08,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:08,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:08,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:08,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:08,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:08,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:08,865 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:38:08,866 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 14:38:09,857 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:38:09,857 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 14:38:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:38:10,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:38:10,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:10,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562652829] [2021-11-19 14:38:10,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562652829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:38:10,525 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:38:10,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:38:10,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256792053] [2021-11-19 14:38:10,527 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:10,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:38:10,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:10,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:38:10,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:38:10,529 INFO L87 Difference]: Start difference. First operand 2646 states and 3846 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 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 14:38:12,550 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:16,509 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:19,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:20,740 WARN L515 Checker$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 14:38:25,292 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:27,756 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:32,066 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:39,891 WARN L515 Checker$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 14:38:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:43,792 INFO L93 Difference]: Finished difference Result 6231 states and 9114 transitions. [2021-11-19 14:38:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:38:43,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 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 190 [2021-11-19 14:38:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:43,802 INFO L225 Difference]: With dead ends: 6231 [2021-11-19 14:38:43,802 INFO L226 Difference]: Without dead ends: 3861 [2021-11-19 14:38:43,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:38:43,806 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 183 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:43,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 519 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 452 Invalid, 1 Unknown, 0 Unchecked, 32.9s Time] [2021-11-19 14:38:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2021-11-19 14:38:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 2676. [2021-11-19 14:38:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 1.445607476635514) internal successors, (3867), 2675 states have internal predecessors, (3867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:38:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 3867 transitions. [2021-11-19 14:38:44,060 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 3867 transitions. Word has length 190 [2021-11-19 14:38:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:44,061 INFO L470 AbstractCegarLoop]: Abstraction has 2676 states and 3867 transitions. [2021-11-19 14:38:44,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 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 14:38:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 3867 transitions. [2021-11-19 14:38:44,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-19 14:38:44,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:44,067 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:38:44,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:44,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:38:44,292 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:38:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1700911676, now seen corresponding path program 1 times [2021-11-19 14:38:44,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:44,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203622217] [2021-11-19 14:38:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:44,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:44,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:44,295 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:44,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:38:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:45,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:38:45,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:45,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:45,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:45,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:45,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:45,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:45,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:45,850 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:38:45,850 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 14:38:46,883 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:38:46,883 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 14:38:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:38:47,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:38:47,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:47,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203622217] [2021-11-19 14:38:47,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203622217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:38:47,521 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:38:47,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:38:47,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353071162] [2021-11-19 14:38:47,522 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:47,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:38:47,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:38:47,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:38:47,523 INFO L87 Difference]: Start difference. First operand 2676 states and 3867 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 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 14:38:49,540 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:57,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:58,632 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:02,344 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:04,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:05,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:09,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:15,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:17,124 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 14:39:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:21,287 INFO L93 Difference]: Finished difference Result 6419 states and 9309 transitions. [2021-11-19 14:39:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:39:21,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 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 191 [2021-11-19 14:39:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:21,294 INFO L225 Difference]: With dead ends: 6419 [2021-11-19 14:39:21,294 INFO L226 Difference]: Without dead ends: 4032 [2021-11-19 14:39:21,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:39:21,297 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 178 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:21,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 502 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 438 Invalid, 2 Unknown, 0 Unchecked, 33.4s Time] [2021-11-19 14:39:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4032 states. [2021-11-19 14:39:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4032 to 2895. [2021-11-19 14:39:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2895 states, 2894 states have (on average 1.4257083621285418) internal successors, (4126), 2894 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2895 states to 2895 states and 4126 transitions. [2021-11-19 14:39:21,611 INFO L78 Accepts]: Start accepts. Automaton has 2895 states and 4126 transitions. Word has length 191 [2021-11-19 14:39:21,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:21,612 INFO L470 AbstractCegarLoop]: Abstraction has 2895 states and 4126 transitions. [2021-11-19 14:39:21,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 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 14:39:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2895 states and 4126 transitions. [2021-11-19 14:39:21,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-19 14:39:21,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:21,619 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:39:21,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:21,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:21,834 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:21,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1281413366, now seen corresponding path program 1 times [2021-11-19 14:39:21,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:21,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276844722] [2021-11-19 14:39:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:21,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:21,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:21,841 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:21,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:39:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:22,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:22,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:22,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:22,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:22,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:22,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:22,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:22,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:23,356 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:39:23,357 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 14:39:24,625 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:39:24,625 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 14:39:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:39:24,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:39:25,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:25,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276844722] [2021-11-19 14:39:25,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276844722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:25,447 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:25,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:39:25,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16281505] [2021-11-19 14:39:25,448 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:25,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:39:25,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:25,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:39:25,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:25,452 INFO L87 Difference]: Start difference. First operand 2895 states and 4126 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:27,483 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:30,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:35,466 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:37,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:41,174 WARN L515 Checker$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 14:39:42,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:44,403 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:45,836 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:50,358 WARN L515 Checker$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 14:39:51,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:57,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:01,117 INFO L93 Difference]: Finished difference Result 7092 states and 10153 transitions. [2021-11-19 14:40:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:40:01,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 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 194 [2021-11-19 14:40:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:01,123 INFO L225 Difference]: With dead ends: 7092 [2021-11-19 14:40:01,124 INFO L226 Difference]: Without dead ends: 4218 [2021-11-19 14:40:01,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:40:01,127 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 175 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:01,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 723 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 583 Invalid, 2 Unknown, 0 Unchecked, 35.3s Time] [2021-11-19 14:40:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2021-11-19 14:40:01,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 3102. [2021-11-19 14:40:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 1.4082554014833923) internal successors, (4367), 3101 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 4367 transitions. [2021-11-19 14:40:01,428 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 4367 transitions. Word has length 194 [2021-11-19 14:40:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:01,429 INFO L470 AbstractCegarLoop]: Abstraction has 3102 states and 4367 transitions. [2021-11-19 14:40:01,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 4367 transitions. [2021-11-19 14:40:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 14:40:01,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:01,436 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:01,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:01,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:01,660 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:01,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1834561464, now seen corresponding path program 1 times [2021-11-19 14:40:01,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:01,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337506747] [2021-11-19 14:40:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:01,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:01,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:01,663 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:01,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:40:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:02,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:40:02,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:02,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:02,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:02,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:02,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:02,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:02,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:03,035 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:40:03,036 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 14:40:04,191 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:40:04,192 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 14:40:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:40:04,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:40:04,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:04,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337506747] [2021-11-19 14:40:04,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337506747] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:04,994 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:04,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:40:04,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662561092] [2021-11-19 14:40:04,994 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:04,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:40:04,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:40:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:40:04,996 INFO L87 Difference]: Start difference. First operand 3102 states and 4367 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:07,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:09,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:15,967 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:17,446 WARN L515 Checker$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 14:40:19,975 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:24,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:26,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:30,836 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:32,551 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 14:40:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:38,524 INFO L93 Difference]: Finished difference Result 7467 states and 10564 transitions. [2021-11-19 14:40:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:40:38,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-19 14:40:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:38,530 INFO L225 Difference]: With dead ends: 7467 [2021-11-19 14:40:38,531 INFO L226 Difference]: Without dead ends: 4386 [2021-11-19 14:40:38,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:40:38,534 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 168 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 56 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:38,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 553 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 439 Invalid, 4 Unknown, 0 Unchecked, 33.1s Time] [2021-11-19 14:40:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-11-19 14:40:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3329. [2021-11-19 14:40:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3329 states, 3328 states have (on average 1.3909254807692308) internal successors, (4629), 3328 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:38,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3329 states to 3329 states and 4629 transitions. [2021-11-19 14:40:38,762 INFO L78 Accepts]: Start accepts. Automaton has 3329 states and 4629 transitions. Word has length 195 [2021-11-19 14:40:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:38,763 INFO L470 AbstractCegarLoop]: Abstraction has 3329 states and 4629 transitions. [2021-11-19 14:40:38,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3329 states and 4629 transitions. [2021-11-19 14:40:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 14:40:38,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:38,770 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:38,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:38,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:38,991 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:38,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:38,992 INFO L85 PathProgramCache]: Analyzing trace with hash 585189628, now seen corresponding path program 1 times [2021-11-19 14:40:38,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:38,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433274951] [2021-11-19 14:40:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:38,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:38,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:38,994 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:38,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:40:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:39,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:40:39,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:40,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:40,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:40,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:40,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:40,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:40,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:40,606 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:40:40,607 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 14:40:42,012 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:40:42,012 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 14:40:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:40:42,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 14:40:42,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:42,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433274951] [2021-11-19 14:40:42,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433274951] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:42,793 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:42,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:40:42,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798721418] [2021-11-19 14:40:42,794 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:42,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:40:42,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:42,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:40:42,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:40:42,795 INFO L87 Difference]: Start difference. First operand 3329 states and 4629 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:44,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:46,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:51,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:54,015 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:56,795 WARN L515 Checker$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 14:41:03,697 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:05,186 WARN L515 Checker$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 14:41:06,274 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:10,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:11,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:14,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:15,092 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 14:41:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:18,332 INFO L93 Difference]: Finished difference Result 7634 states and 10722 transitions. [2021-11-19 14:41:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:41:18,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-19 14:41:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:18,338 INFO L225 Difference]: With dead ends: 7634 [2021-11-19 14:41:18,339 INFO L226 Difference]: Without dead ends: 4326 [2021-11-19 14:41:18,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:41:18,342 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 157 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 61 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:18,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 519 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 434 Invalid, 3 Unknown, 0 Unchecked, 35.1s Time] [2021-11-19 14:41:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-11-19 14:41:18,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3348. [2021-11-19 14:41:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3348 states, 3347 states have (on average 1.3884075291305646) internal successors, (4647), 3347 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3348 states to 3348 states and 4647 transitions. [2021-11-19 14:41:18,578 INFO L78 Accepts]: Start accepts. Automaton has 3348 states and 4647 transitions. Word has length 195 [2021-11-19 14:41:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:18,580 INFO L470 AbstractCegarLoop]: Abstraction has 3348 states and 4647 transitions. [2021-11-19 14:41:18,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:18,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3348 states and 4647 transitions. [2021-11-19 14:41:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-19 14:41:18,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:18,591 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:18,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:18,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:18,811 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash -396295493, now seen corresponding path program 1 times [2021-11-19 14:41:18,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:18,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059042277] [2021-11-19 14:41:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:18,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:18,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:18,814 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:18,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a13d55b2-a53a-4643-a316-c131f625c000/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:41:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:19,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:41:19,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:20,187 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 162 treesize of output 138 [2021-11-19 14:41:20,193 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 138 treesize of output 90 [2021-11-19 14:41:20,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:20,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:20,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:20,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:20,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:20,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:20,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:20,205 INFO L190 IndexEqualityManager]: detected not equals via solver