./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i --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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/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 d619c50f205026415119876db06c9bf079f51316bee7c051af8e3a06a37e393d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:37:08,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:37:08,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:37:08,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:37:08,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:37:08,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:37:08,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:37:08,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:37:08,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:37:08,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:37:08,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:37:08,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:37:08,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:37:08,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:37:08,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:37:08,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:37:08,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:37:08,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:37:08,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:37:08,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:37:08,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:37:08,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:37:08,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:37:08,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:37:08,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:37:08,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:37:08,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:37:08,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:37:08,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:37:08,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:37:08,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:37:08,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:37:08,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:37:08,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:37:08,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:37:08,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:37:08,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:37:08,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:37:08,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:37:08,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:37:08,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:37:08,538 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:37:08,569 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:37:08,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:37:08,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:37:08,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:37:08,571 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:37:08,572 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:37:08,572 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:37:08,572 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:37:08,573 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:37:08,573 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:37:08,573 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:37:08,573 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:37:08,574 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:37:08,574 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:37:08,574 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:37:08,575 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:37:08,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:37:08,576 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:37:08,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:37:08,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:37:08,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:37:08,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:37:08,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:37:08,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:37:08,578 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:37:08,578 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:37:08,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:37:08,579 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:37:08,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:37:08,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:37:08,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:37:08,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:08,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:37:08,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:37:08,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:37:08,581 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:37:08,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:37:08,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:37:08,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:37:08,582 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:37:08,582 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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d619c50f205026415119876db06c9bf079f51316bee7c051af8e3a06a37e393d [2021-11-19 13:37:08,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:37:08,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:37:08,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:37:08,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:37:08,992 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:37:08,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i [2021-11-19 13:37:09,103 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/data/48c62a3e5/f9c762da39d844fcbacf353dab08769c/FLAG55b25a4b9 [2021-11-19 13:37:09,858 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:37:09,858 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i [2021-11-19 13:37:09,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/data/48c62a3e5/f9c762da39d844fcbacf353dab08769c/FLAG55b25a4b9 [2021-11-19 13:37:10,041 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/data/48c62a3e5/f9c762da39d844fcbacf353dab08769c [2021-11-19 13:37:10,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:37:10,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:37:10,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:10,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:37:10,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:37:10,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:10" (1/1) ... [2021-11-19 13:37:10,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@376de526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:10, skipping insertion in model container [2021-11-19 13:37:10,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:10" (1/1) ... [2021-11-19 13:37:10,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:37:10,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:10,687 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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[37019,37032] [2021-11-19 13:37:10,827 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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[47352,47365] [2021-11-19 13:37:10,871 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:10,894 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 13:37:10,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c6e30ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:10, skipping insertion in model container [2021-11-19 13:37:10,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:10,897 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:37:10,900 INFO L158 Benchmark]: Toolchain (without parser) took 852.54ms. Allocated memory is still 148.9MB. Free memory was 111.6MB in the beginning and 114.1MB in the end (delta: -2.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 13:37:10,902 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 88.1MB. Free memory was 62.1MB in the beginning and 62.1MB in the end (delta: 30.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:37:10,904 INFO L158 Benchmark]: CACSL2BoogieTranslator took 849.59ms. Allocated memory is still 148.9MB. Free memory was 111.2MB in the beginning and 114.1MB in the end (delta: -2.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 13:37:10,907 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 88.1MB. Free memory was 62.1MB in the beginning and 62.1MB in the end (delta: 30.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 849.59ms. Allocated memory is still 148.9MB. Free memory was 111.2MB in the beginning and 114.1MB in the end (delta: -2.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 815]: 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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/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 d619c50f205026415119876db06c9bf079f51316bee7c051af8e3a06a37e393d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:37:13,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:37:13,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:37:13,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:37:13,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:37:13,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:37:13,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:37:13,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:37:13,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:37:13,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:37:13,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:37:13,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:37:13,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:37:13,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:37:13,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:37:13,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:37:13,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:37:13,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:37:13,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:37:13,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:37:13,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:37:13,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:37:13,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:37:13,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:37:13,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:37:13,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:37:13,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:37:13,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:37:13,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:37:13,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:37:13,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:37:13,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:37:13,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:37:13,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:37:13,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:37:13,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:37:13,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:37:13,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:37:13,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:37:13,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:37:13,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:37:13,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:37:13,806 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:37:13,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:37:13,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:37:13,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:37:13,809 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:37:13,809 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:37:13,810 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:37:13,810 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:37:13,810 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:37:13,811 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:37:13,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:37:13,813 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:37:13,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:37:13,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:37:13,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:37:13,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:37:13,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:37:13,815 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:37:13,815 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:37:13,816 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:37:13,816 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:37:13,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:37:13,816 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:37:13,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:37:13,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:37:13,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:37:13,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:37:13,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:13,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:37:13,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:37:13,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:37:13,819 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:37:13,819 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:13,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:37:13,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:37:13,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:37:13,821 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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d619c50f205026415119876db06c9bf079f51316bee7c051af8e3a06a37e393d [2021-11-19 13:37:14,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:37:14,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:37:14,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:37:14,344 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:37:14,345 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:37:14,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i [2021-11-19 13:37:14,446 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/data/14ccbb259/7fbd26787a994495a270294e679a5ea8/FLAGead36e64e [2021-11-19 13:37:15,257 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:37:15,259 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i [2021-11-19 13:37:15,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/data/14ccbb259/7fbd26787a994495a270294e679a5ea8/FLAGead36e64e [2021-11-19 13:37:15,397 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/data/14ccbb259/7fbd26787a994495a270294e679a5ea8 [2021-11-19 13:37:15,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:37:15,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:37:15,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:15,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:37:15,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:37:15,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:15" (1/1) ... [2021-11-19 13:37:15,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317db369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:15, skipping insertion in model container [2021-11-19 13:37:15,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:37:15" (1/1) ... [2021-11-19 13:37:15,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:37:15,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:16,038 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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[37019,37032] [2021-11-19 13:37:16,159 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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[47352,47365] [2021-11-19 13:37:16,192 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:16,205 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:37:16,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:37:16,240 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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[37019,37032] [2021-11-19 13:37:16,306 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[47352,47365] [2021-11-19 13:37:16,317 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:16,324 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:37:16,380 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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[37019,37032] [2021-11-19 13:37:16,500 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_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test2-2.i[47352,47365] [2021-11-19 13:37:16,512 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:37:16,601 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:37:16,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16 WrapperNode [2021-11-19 13:37:16,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:37:16,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:37:16,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:37:16,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:37:16,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16" (1/1) ... [2021-11-19 13:37:16,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16" (1/1) ... [2021-11-19 13:37:16,760 INFO L137 Inliner]: procedures = 211, calls = 286, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1039 [2021-11-19 13:37:16,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:37:16,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:37:16,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:37:16,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:37:16,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16" (1/1) ... [2021-11-19 13:37:16,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16" (1/1) ... [2021-11-19 13:37:16,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16" (1/1) ... [2021-11-19 13:37:16,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16" (1/1) ... [2021-11-19 13:37:16,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16" (1/1) ... [2021-11-19 13:37:16,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16" (1/1) ... [2021-11-19 13:37:16,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16" (1/1) ... [2021-11-19 13:37:16,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:37:16,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:37:16,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:37:16,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:37:16,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16" (1/1) ... [2021-11-19 13:37:16,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:37:16,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:16,995 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:37:16,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:37:17,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 13:37:17,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:37:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 13:37:17,055 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 13:37:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:37:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 13:37:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:37:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:37:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:37:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:37:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 13:37:17,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 13:37:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:37:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:37:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:37:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:37:17,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:37:17,464 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:37:17,466 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:37:24,848 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:37:24,860 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:37:24,861 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-19 13:37:24,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:37:24 BoogieIcfgContainer [2021-11-19 13:37:24,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:37:24,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:37:24,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:37:24,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:37:24,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:37:15" (1/3) ... [2021-11-19 13:37:24,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e13a0f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:37:24, skipping insertion in model container [2021-11-19 13:37:24,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:37:16" (2/3) ... [2021-11-19 13:37:24,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e13a0f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:37:24, skipping insertion in model container [2021-11-19 13:37:24,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:37:24" (3/3) ... [2021-11-19 13:37:24,881 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test2-2.i [2021-11-19 13:37:24,887 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:37:24,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 13:37:24,946 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:37:24,954 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 13:37:24,955 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 13:37:24,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 206 states, 193 states have (on average 1.689119170984456) internal successors, (326), 200 states have internal predecessors, (326), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 13:37:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 13:37:24,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:24,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:24,989 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:24,996 INFO L85 PathProgramCache]: Analyzing trace with hash -858859523, now seen corresponding path program 1 times [2021-11-19 13:37:25,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:25,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413265640] [2021-11-19 13:37:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:25,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:25,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:25,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:25,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:37:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:25,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:37:25,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:25,382 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 13:37:25,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:25,413 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 13:37:25,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:25,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413265640] [2021-11-19 13:37:25,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413265640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:25,415 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:25,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:37:25,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534737997] [2021-11-19 13:37:25,418 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:25,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:37:25,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:25,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:37:25,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:37:25,461 INFO L87 Difference]: Start difference. First operand has 206 states, 193 states have (on average 1.689119170984456) internal successors, (326), 200 states have internal predecessors, (326), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:25,520 INFO L93 Difference]: Finished difference Result 410 states and 687 transitions. [2021-11-19 13:37:25,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:37:25,522 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-19 13:37:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:25,537 INFO L225 Difference]: With dead ends: 410 [2021-11-19 13:37:25,537 INFO L226 Difference]: Without dead ends: 173 [2021-11-19 13:37:25,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:37:25,554 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:25,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:37:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-19 13:37:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-11-19 13:37:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.3229813664596273) internal successors, (213), 167 states have internal predecessors, (213), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 13:37:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2021-11-19 13:37:25,623 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 9 [2021-11-19 13:37:25,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:25,623 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2021-11-19 13:37:25,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2021-11-19 13:37:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 13:37:25,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:25,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:25,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:25,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:25,831 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash -294026559, now seen corresponding path program 1 times [2021-11-19 13:37:25,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:25,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574234041] [2021-11-19 13:37:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:25,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:25,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:25,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:25,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:37:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:26,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:37:26,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:26,433 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 13:37:26,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:26,774 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 13:37:26,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:26,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574234041] [2021-11-19 13:37:26,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574234041] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:26,776 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:26,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 13:37:26,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120414411] [2021-11-19 13:37:26,776 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:26,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:26,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:26,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:26,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:37:26,780 INFO L87 Difference]: Start difference. First operand 173 states and 229 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:26,990 INFO L93 Difference]: Finished difference Result 260 states and 347 transitions. [2021-11-19 13:37:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:37:26,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 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 44 [2021-11-19 13:37:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:26,994 INFO L225 Difference]: With dead ends: 260 [2021-11-19 13:37:26,995 INFO L226 Difference]: Without dead ends: 182 [2021-11-19 13:37:26,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:37:26,998 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 95 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:26,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 669 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:37:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-19 13:37:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2021-11-19 13:37:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 164 states have (on average 1.2682926829268293) internal successors, (208), 170 states have internal predecessors, (208), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 13:37:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 224 transitions. [2021-11-19 13:37:27,019 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 224 transitions. Word has length 44 [2021-11-19 13:37:27,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:27,020 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 224 transitions. [2021-11-19 13:37:27,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:27,021 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 224 transitions. [2021-11-19 13:37:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 13:37:27,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:27,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:27,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:27,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:27,241 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:27,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1193469581, now seen corresponding path program 1 times [2021-11-19 13:37:27,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:27,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907267001] [2021-11-19 13:37:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:27,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:27,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:27,245 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:27,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:37:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:27,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:37:27,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:27,695 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 13:37:27,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:28,179 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 13:37:28,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:28,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907267001] [2021-11-19 13:37:28,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907267001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:28,181 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:28,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-19 13:37:28,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532991380] [2021-11-19 13:37:28,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:28,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:37:28,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:28,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:37:28,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:37:28,184 INFO L87 Difference]: Start difference. First operand 176 states and 224 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:28,333 INFO L93 Difference]: Finished difference Result 256 states and 324 transitions. [2021-11-19 13:37:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:37:28,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 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 44 [2021-11-19 13:37:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:28,339 INFO L225 Difference]: With dead ends: 256 [2021-11-19 13:37:28,340 INFO L226 Difference]: Without dead ends: 175 [2021-11-19 13:37:28,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:37:28,349 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 119 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:28,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 526 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:37:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-19 13:37:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2021-11-19 13:37:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.2531645569620253) internal successors, (198), 164 states have internal predecessors, (198), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 13:37:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2021-11-19 13:37:28,397 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 44 [2021-11-19 13:37:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:28,398 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2021-11-19 13:37:28,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2021-11-19 13:37:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 13:37:28,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:28,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:28,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-19 13:37:28,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:28,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:28,621 INFO L85 PathProgramCache]: Analyzing trace with hash -440517769, now seen corresponding path program 1 times [2021-11-19 13:37:28,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:28,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133058662] [2021-11-19 13:37:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:28,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:28,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:28,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:28,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:37:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:28,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:37:28,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:28,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:37:28,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:37:28,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:37:29,027 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 13:37:29,028 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 13:37:29,117 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 13:37:29,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-19 13:37:29,238 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 13:37:29,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:29,434 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 13:37:29,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:29,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133058662] [2021-11-19 13:37:29,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133058662] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:29,435 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:29,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:37:29,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124208152] [2021-11-19 13:37:29,436 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:29,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:37:29,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:29,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:37:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:37:29,438 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:35,065 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 13:37:37,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:37,133 INFO L93 Difference]: Finished difference Result 423 states and 530 transitions. [2021-11-19 13:37:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:37:37,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 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 44 [2021-11-19 13:37:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:37,140 INFO L225 Difference]: With dead ends: 423 [2021-11-19 13:37:37,140 INFO L226 Difference]: Without dead ends: 347 [2021-11-19 13:37:37,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:37:37,146 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 321 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:37,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 793 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-19 13:37:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-19 13:37:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 172. [2021-11-19 13:37:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.25) internal successors, (200), 166 states have internal predecessors, (200), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 13:37:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 216 transitions. [2021-11-19 13:37:37,175 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 216 transitions. Word has length 44 [2021-11-19 13:37:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:37,175 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 216 transitions. [2021-11-19 13:37:37,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 216 transitions. [2021-11-19 13:37:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 13:37:37,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:37,185 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:37,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:37,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:37,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:37,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1362911587, now seen corresponding path program 1 times [2021-11-19 13:37:37,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:37,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998709357] [2021-11-19 13:37:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:37,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:37,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:37,410 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:37,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:37:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:37,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:37:37,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:37,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:38,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:38,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998709357] [2021-11-19 13:37:38,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998709357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:38,241 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:38,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:37:38,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194275578] [2021-11-19 13:37:38,241 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:38,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:37:38,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:37:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:37:38,243 INFO L87 Difference]: Start difference. First operand 172 states and 216 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:38,400 INFO L93 Difference]: Finished difference Result 349 states and 440 transitions. [2021-11-19 13:37:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:37:38,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 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 96 [2021-11-19 13:37:38,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:38,403 INFO L225 Difference]: With dead ends: 349 [2021-11-19 13:37:38,403 INFO L226 Difference]: Without dead ends: 181 [2021-11-19 13:37:38,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:37:38,405 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 174 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:38,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 421 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:37:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-19 13:37:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2021-11-19 13:37:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.196319018404908) internal successors, (195), 169 states have internal predecessors, (195), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 13:37:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-11-19 13:37:38,420 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 96 [2021-11-19 13:37:38,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:38,421 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-11-19 13:37:38,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-11-19 13:37:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 13:37:38,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:38,424 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:38,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:38,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:38,641 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:38,641 INFO L85 PathProgramCache]: Analyzing trace with hash -725253137, now seen corresponding path program 1 times [2021-11-19 13:37:38,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:38,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126495044] [2021-11-19 13:37:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:38,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:38,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:38,644 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:38,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:37:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:39,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:37:39,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:39,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:39,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:39,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126495044] [2021-11-19 13:37:39,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126495044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:39,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2088154783] [2021-11-19 13:37:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:39,749 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:39,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:39,753 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:39,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 13:37:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:40,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:37:40,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:40,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:41,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2088154783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:41,294 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:37:41,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4, 4] total 5 [2021-11-19 13:37:41,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001247622] [2021-11-19 13:37:41,296 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:41,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:37:41,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:41,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:37:41,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:37:41,298 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:42,087 INFO L93 Difference]: Finished difference Result 480 states and 581 transitions. [2021-11-19 13:37:42,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:37:42,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-11-19 13:37:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:42,093 INFO L225 Difference]: With dead ends: 480 [2021-11-19 13:37:42,093 INFO L226 Difference]: Without dead ends: 309 [2021-11-19 13:37:42,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:37:42,095 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 114 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:42,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 410 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:37:42,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-19 13:37:42,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 307. [2021-11-19 13:37:42,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 289 states have (on average 1.1868512110726643) internal successors, (343), 300 states have internal predecessors, (343), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-19 13:37:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 371 transitions. [2021-11-19 13:37:42,127 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 371 transitions. Word has length 96 [2021-11-19 13:37:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:42,128 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 371 transitions. [2021-11-19 13:37:42,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:42,129 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 371 transitions. [2021-11-19 13:37:42,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 13:37:42,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:42,142 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 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 13:37:42,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:42,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-19 13:37:42,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:42,563 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash -824366783, now seen corresponding path program 1 times [2021-11-19 13:37:42,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:42,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875391060] [2021-11-19 13:37:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:42,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:42,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:42,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:42,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:37:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:37:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:37:43,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:37:44,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:44,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875391060] [2021-11-19 13:37:44,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875391060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:44,703 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:44,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:37:44,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284741354] [2021-11-19 13:37:44,703 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:44,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:37:44,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:44,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:37:44,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:37:44,705 INFO L87 Difference]: Start difference. First operand 307 states and 371 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:45,421 INFO L93 Difference]: Finished difference Result 547 states and 648 transitions. [2021-11-19 13:37:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:37:45,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 103 [2021-11-19 13:37:45,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:45,426 INFO L225 Difference]: With dead ends: 547 [2021-11-19 13:37:45,427 INFO L226 Difference]: Without dead ends: 385 [2021-11-19 13:37:45,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 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 13:37:45,429 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 29 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:45,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 422 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:37:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-19 13:37:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2021-11-19 13:37:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 365 states have (on average 1.158904109589041) internal successors, (423), 376 states have internal predecessors, (423), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-19 13:37:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 451 transitions. [2021-11-19 13:37:45,457 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 451 transitions. Word has length 103 [2021-11-19 13:37:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:45,458 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 451 transitions. [2021-11-19 13:37:45,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:37:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 451 transitions. [2021-11-19 13:37:45,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 13:37:45,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:45,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:37:45,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:45,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:45,674 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2014363869, now seen corresponding path program 1 times [2021-11-19 13:37:45,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:45,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706221335] [2021-11-19 13:37:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:45,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:45,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:45,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:45,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:37:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:46,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:37:46,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:37:46,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:46,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:46,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706221335] [2021-11-19 13:37:46,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706221335] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:46,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:37:46,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:37:46,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797697203] [2021-11-19 13:37:46,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:46,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:37:46,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:37:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:37:46,697 INFO L87 Difference]: Start difference. First operand 383 states and 451 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 13:37:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:46,774 INFO L93 Difference]: Finished difference Result 724 states and 860 transitions. [2021-11-19 13:37:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:37:46,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 111 [2021-11-19 13:37:46,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:46,780 INFO L225 Difference]: With dead ends: 724 [2021-11-19 13:37:46,780 INFO L226 Difference]: Without dead ends: 386 [2021-11-19 13:37:46,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:37:46,782 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 2 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:46,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 596 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:37:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-19 13:37:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-11-19 13:37:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 367 states have (on average 1.1607629427792916) internal successors, (426), 379 states have internal predecessors, (426), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (16), 6 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-19 13:37:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 456 transitions. [2021-11-19 13:37:46,813 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 456 transitions. Word has length 111 [2021-11-19 13:37:46,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:46,814 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 456 transitions. [2021-11-19 13:37:46,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 13:37:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 456 transitions. [2021-11-19 13:37:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:37:46,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:46,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:37:46,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:47,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:47,039 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:47,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:47,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1981968123, now seen corresponding path program 1 times [2021-11-19 13:37:47,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:47,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503221119] [2021-11-19 13:37:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:47,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:47,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:47,041 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:47,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:37:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:47,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:37:47,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:47,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:37:48,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:48,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503221119] [2021-11-19 13:37:48,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503221119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:48,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2116263851] [2021-11-19 13:37:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:48,060 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:48,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:48,063 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:48,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 13:37:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:37:48,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:37:48,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:37:49,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2116263851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:49,357 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:37:49,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-19 13:37:49,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936967971] [2021-11-19 13:37:49,357 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:49,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:37:49,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:49,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:37:49,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:37:49,359 INFO L87 Difference]: Start difference. First operand 386 states and 456 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 13:37:51,957 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 13:37:54,115 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 13:37:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:54,218 INFO L93 Difference]: Finished difference Result 676 states and 801 transitions. [2021-11-19 13:37:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:37:54,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 113 [2021-11-19 13:37:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:54,223 INFO L225 Difference]: With dead ends: 676 [2021-11-19 13:37:54,223 INFO L226 Difference]: Without dead ends: 335 [2021-11-19 13:37:54,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:37:54,225 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 250 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:54,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 279 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-19 13:37:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-19 13:37:54,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 219. [2021-11-19 13:37:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 206 states have (on average 1.1699029126213591) internal successors, (241), 213 states have internal predecessors, (241), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 13:37:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 258 transitions. [2021-11-19 13:37:54,242 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 258 transitions. Word has length 113 [2021-11-19 13:37:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:54,243 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 258 transitions. [2021-11-19 13:37:54,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 13:37:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 258 transitions. [2021-11-19 13:37:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 13:37:54,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:54,246 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:37:54,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:54,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:54,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:54,663 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:54,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1061160779, now seen corresponding path program 1 times [2021-11-19 13:37:54,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:54,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745271941] [2021-11-19 13:37:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:54,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:54,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:54,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:54,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:37:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:54,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:37:54,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:55,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:37:55,672 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:55,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745271941] [2021-11-19 13:37:55,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745271941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:55,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2039194352] [2021-11-19 13:37:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:55,673 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:55,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:55,679 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:55,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 13:37:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:56,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:37:56,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:37:56,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:37:56,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2039194352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:56,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663704160] [2021-11-19 13:37:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:56,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:56,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:37:56,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:37:56,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 13:37:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:57,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:37:57,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:37:57,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:37:57,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663704160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:57,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:37:57,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-19 13:37:57,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082793426] [2021-11-19 13:37:57,854 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:37:57,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:37:57,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:57,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:37:57,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:37:57,857 INFO L87 Difference]: Start difference. First operand 219 states and 258 transitions. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 13:37:58,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:58,405 INFO L93 Difference]: Finished difference Result 405 states and 489 transitions. [2021-11-19 13:37:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:37:58,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 120 [2021-11-19 13:37:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:58,409 INFO L225 Difference]: With dead ends: 405 [2021-11-19 13:37:58,409 INFO L226 Difference]: Without dead ends: 234 [2021-11-19 13:37:58,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:37:58,411 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 52 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:58,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1170 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:37:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-19 13:37:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2021-11-19 13:37:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 216 states have (on average 1.1990740740740742) internal successors, (259), 223 states have internal predecessors, (259), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 13:37:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 276 transitions. [2021-11-19 13:37:58,428 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 276 transitions. Word has length 120 [2021-11-19 13:37:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:58,428 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 276 transitions. [2021-11-19 13:37:58,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 13:37:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 276 transitions. [2021-11-19 13:37:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 13:37:58,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:58,431 INFO L514 BasicCegarLoop]: trace histogram [8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:37:58,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:58,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:58,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-19 13:37:59,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:37:59,037 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:59,038 INFO L85 PathProgramCache]: Analyzing trace with hash 678679827, now seen corresponding path program 2 times [2021-11-19 13:37:59,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:59,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363195550] [2021-11-19 13:37:59,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:37:59,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:59,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:59,040 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:59,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:37:59,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:37:59,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:59,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:37:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:37:59,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:38:00,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:00,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363195550] [2021-11-19 13:38:00,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363195550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:38:00,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1701893017] [2021-11-19 13:38:00,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:38:00,362 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:38:00,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:38:00,363 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:38:00,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 13:38:01,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:38:01,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:38:01,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:38:01,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:38:01,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:38:01,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1701893017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:38:01,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581981612] [2021-11-19 13:38:01,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:38:01,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:38:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:38:01,848 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:38:01,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 13:38:02,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:38:02,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:38:02,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:38:02,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 13:38:02,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:38:03,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581981612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:38:03,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:38:03,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-19 13:38:03,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139200243] [2021-11-19 13:38:03,380 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:38:03,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 13:38:03,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:03,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 13:38:03,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:38:03,382 INFO L87 Difference]: Start difference. First operand 230 states and 276 transitions. Second operand has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:38:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:05,064 INFO L93 Difference]: Finished difference Result 423 states and 514 transitions. [2021-11-19 13:38:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 13:38:05,065 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2021-11-19 13:38:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:05,068 INFO L225 Difference]: With dead ends: 423 [2021-11-19 13:38:05,068 INFO L226 Difference]: Without dead ends: 243 [2021-11-19 13:38:05,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 13:38:05,070 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 84 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:05,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1211 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:38:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-19 13:38:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 237. [2021-11-19 13:38:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 223 states have (on average 1.1928251121076232) internal successors, (266), 230 states have internal predecessors, (266), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 13:38:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 283 transitions. [2021-11-19 13:38:05,090 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 283 transitions. Word has length 126 [2021-11-19 13:38:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:05,090 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 283 transitions. [2021-11-19 13:38:05,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 13:38:05,091 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 283 transitions. [2021-11-19 13:38:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 13:38:05,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:05,093 INFO L514 BasicCegarLoop]: trace histogram [15, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:38:05,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:05,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-19 13:38:05,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:05,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:38:05,712 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:05,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:05,712 INFO L85 PathProgramCache]: Analyzing trace with hash -71339355, now seen corresponding path program 3 times [2021-11-19 13:38:05,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:05,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735943088] [2021-11-19 13:38:05,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:38:05,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:05,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:05,717 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:05,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:38:10,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 13:38:10,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:38:10,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:38:10,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 13:38:10,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 13:38:11,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:11,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735943088] [2021-11-19 13:38:11,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735943088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:38:11,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [348843737] [2021-11-19 13:38:11,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:38:11,341 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:38:11,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:38:11,342 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:38:11,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 13:38:33,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 13:38:33,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:38:33,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:38:33,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 13:38:33,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 13:38:34,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [348843737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:38:34,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308236839] [2021-11-19 13:38:34,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:38:34,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:38:34,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:38:34,173 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:38:34,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_429070ad-9a1b-49e0-a2f7-272bc12bbf0d/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process