./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:48:42,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:48:42,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:48:42,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:48:42,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:48:42,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:48:42,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:48:42,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:48:42,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:48:42,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:48:42,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:48:42,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:48:42,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:48:42,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:48:42,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:48:42,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:48:42,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:48:42,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:48:42,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:48:42,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:48:42,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:48:42,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:48:42,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:48:42,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:48:42,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:48:42,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:48:42,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:48:42,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:48:42,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:48:42,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:48:42,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:48:42,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:48:42,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:48:42,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:48:42,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:48:42,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:48:42,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:48:42,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:48:42,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:48:42,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:48:42,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:48:42,716 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 02:48:42,761 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:48:42,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:48:42,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:48:42,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:48:42,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:48:42,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:48:42,763 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:48:42,764 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:48:42,764 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:48:42,764 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:48:42,765 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:48:42,766 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:48:42,766 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:48:42,766 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:48:42,766 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:48:42,766 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:48:42,767 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:48:42,767 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:48:42,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:48:42,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:48:42,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:48:42,768 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:48:42,768 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:48:42,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:48:42,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:48:42,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:48:42,771 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:48:42,771 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:48:42,772 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:48:42,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:48:42,772 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:48:42,772 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:48:42,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:48:42,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:48:42,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:48:42,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:48:42,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:48:42,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:48:42,774 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:48:42,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:48:42,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:48:42,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:48:42,775 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_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2021-11-23 02:48:43,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:48:43,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:48:43,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:48:43,103 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:48:43,105 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:48:43,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-11-23 02:48:43,212 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/data/3d88d3087/c43c130ce72b4d6c861a988599ae5bbe/FLAG00f64ac2b [2021-11-23 02:48:43,703 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:48:43,706 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-11-23 02:48:43,724 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/data/3d88d3087/c43c130ce72b4d6c861a988599ae5bbe/FLAG00f64ac2b [2021-11-23 02:48:44,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/data/3d88d3087/c43c130ce72b4d6c861a988599ae5bbe [2021-11-23 02:48:44,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:48:44,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:48:44,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:48:44,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:48:44,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:48:44,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:48:44" (1/1) ... [2021-11-23 02:48:44,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49bb23ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:44, skipping insertion in model container [2021-11-23 02:48:44,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:48:44" (1/1) ... [2021-11-23 02:48:44,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:48:44,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:48:44,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:48:44,396 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) [2021-11-23 02:48:44,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e24d454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:44, skipping insertion in model container [2021-11-23 02:48:44,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:48:44,397 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 02:48:44,399 INFO L158 Benchmark]: Toolchain (without parser) took 361.06ms. Allocated memory is still 94.4MB. Free memory was 52.0MB in the beginning and 69.4MB in the end (delta: -17.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:48:44,400 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 94.4MB. Free memory is still 69.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:48:44,400 INFO L158 Benchmark]: CACSL2BoogieTranslator took 358.58ms. Allocated memory is still 94.4MB. Free memory was 51.7MB in the beginning and 69.4MB in the end (delta: -17.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:48:44,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 94.4MB. Free memory is still 69.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 358.58ms. Allocated memory is still 94.4MB. Free memory was 51.7MB in the beginning and 69.4MB in the end (delta: -17.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 530]: 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_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:48:46,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:48:46,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:48:46,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:48:46,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:48:46,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:48:46,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:48:46,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:48:46,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:48:46,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:48:46,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:48:46,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:48:46,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:48:46,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:48:46,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:48:46,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:48:46,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:48:46,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:48:46,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:48:46,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:48:46,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:48:46,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:48:46,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:48:46,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:48:46,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:48:46,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:48:46,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:48:46,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:48:46,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:48:46,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:48:46,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:48:46,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:48:46,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:48:46,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:48:46,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:48:46,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:48:46,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:48:46,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:48:46,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:48:46,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:48:46,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:48:46,658 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 02:48:46,697 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:48:46,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:48:46,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:48:46,698 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:48:46,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:48:46,699 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:48:46,699 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:48:46,699 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:48:46,699 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:48:46,700 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:48:46,700 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:48:46,700 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:48:46,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:48:46,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:48:46,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:48:46,701 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:48:46,701 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:48:46,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:48:46,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:48:46,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:48:46,702 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:48:46,702 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:48:46,703 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:48:46,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:48:46,703 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:48:46,703 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:48:46,703 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:48:46,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:48:46,704 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:48:46,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:48:46,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:48:46,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:48:46,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:48:46,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:48:46,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:48:46,709 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:48:46,710 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:48:46,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:48:46,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:48:46,729 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_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2021-11-23 02:48:47,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:48:47,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:48:47,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:48:47,096 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:48:47,097 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:48:47,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-11-23 02:48:47,170 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/data/8faae3ce7/9ebc6b5a8f904fe184d3f5079e85e11a/FLAG8dd4237a1 [2021-11-23 02:48:47,704 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:48:47,720 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2021-11-23 02:48:47,732 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/data/8faae3ce7/9ebc6b5a8f904fe184d3f5079e85e11a/FLAG8dd4237a1 [2021-11-23 02:48:48,022 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/data/8faae3ce7/9ebc6b5a8f904fe184d3f5079e85e11a [2021-11-23 02:48:48,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:48:48,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:48:48,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:48:48,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:48:48,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:48:48,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a588e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48, skipping insertion in model container [2021-11-23 02:48:48,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:48:48,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:48:48,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:48:48,506 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 02:48:48,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:48:48,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:48:48,553 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:48:48,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:48:48,633 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:48:48,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48 WrapperNode [2021-11-23 02:48:48,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:48:48,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:48:48,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:48:48,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:48:48,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,684 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-23 02:48:48,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:48:48,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:48:48,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:48:48,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:48:48,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:48:48,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:48:48,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:48:48,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:48:48,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48" (1/1) ... [2021-11-23 02:48:48,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:48:48,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:48:48,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:48:48,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:48:48,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:48:48,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:48:48,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:48:48,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 02:48:48,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:48:48,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:48:48,927 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:48:48,928 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:48:49,302 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:48:49,309 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:48:49,309 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:48:49,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:48:49 BoogieIcfgContainer [2021-11-23 02:48:49,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:48:49,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:48:49,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:48:49,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:48:49,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:48:48" (1/3) ... [2021-11-23 02:48:49,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511f9a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:48:49, skipping insertion in model container [2021-11-23 02:48:49,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:48" (2/3) ... [2021-11-23 02:48:49,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511f9a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:48:49, skipping insertion in model container [2021-11-23 02:48:49,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:48:49" (3/3) ... [2021-11-23 02:48:49,319 INFO L111 eAbstractionObserver]: Analyzing ICFG bubblesort-alloca-2.i [2021-11-23 02:48:49,327 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:48:49,327 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-23 02:48:49,399 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:48:49,418 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-23 02:48:49,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-23 02:48:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:48:49,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:49,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:48:49,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:48:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:49,464 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-23 02:48:49,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:48:49,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129835657] [2021-11-23 02:48:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:49,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:48:49,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:48:49,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:48:49,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:48:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:49,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:48:49,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:48:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:49,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:49,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:48:49,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129835657] [2021-11-23 02:48:49,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129835657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:49,722 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:49,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:48:49,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55764460] [2021-11-23 02:48:49,725 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:49,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:48:49,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:48:49,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:48:49,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:49,767 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:49,915 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-23 02:48:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:48:49,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-23 02:48:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:49,926 INFO L225 Difference]: With dead ends: 40 [2021-11-23 02:48:49,927 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 02:48:49,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:49,932 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:49,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:48:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 02:48:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-23 02:48:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-23 02:48:49,967 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2021-11-23 02:48:49,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:49,968 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-23 02:48:49,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:49,968 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-23 02:48:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:48:49,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:49,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:48:49,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:50,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:48:50,188 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:48:50,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:50,189 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-23 02:48:50,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:48:50,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075221879] [2021-11-23 02:48:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:50,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:48:50,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:48:50,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:48:50,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:48:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:50,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:48:50,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:50,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:48:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:50,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:50,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:48:50,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075221879] [2021-11-23 02:48:50,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075221879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:50,591 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:50,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 02:48:50,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988281880] [2021-11-23 02:48:50,592 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:50,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:48:50,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:48:50,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:48:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:48:50,595 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:51,438 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2021-11-23 02:48:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:48:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 6 [2021-11-23 02:48:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:51,442 INFO L225 Difference]: With dead ends: 108 [2021-11-23 02:48:51,442 INFO L226 Difference]: Without dead ends: 108 [2021-11-23 02:48:51,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:48:51,444 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 149 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:51,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 117 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:48:51,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-23 02:48:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 42. [2021-11-23 02:48:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 41 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) [2021-11-23 02:48:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-23 02:48:51,454 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-11-23 02:48:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:51,454 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-23 02:48:51,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-23 02:48:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:48:51,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:51,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:51,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:51,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:48:51,667 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:48:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:51,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052082, now seen corresponding path program 1 times [2021-11-23 02:48:51,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:48:51,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446194455] [2021-11-23 02:48:51,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:51,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:48:51,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:48:51,670 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:48:51,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:48:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:51,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:48:51,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:51,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:51,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:48:51,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446194455] [2021-11-23 02:48:51,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446194455] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:51,904 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:51,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:48:51,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435062690] [2021-11-23 02:48:51,905 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:51,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:48:51,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:48:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:48:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:48:51,909 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:52,002 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-11-23 02:48:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:48:52,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2021-11-23 02:48:52,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:52,005 INFO L225 Difference]: With dead ends: 67 [2021-11-23 02:48:52,005 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 02:48:52,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:48:52,006 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:52,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 79 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:48:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 02:48:52,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-11-23 02:48:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-23 02:48:52,016 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 9 [2021-11-23 02:48:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:52,017 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-23 02:48:52,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-23 02:48:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:48:52,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:52,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:52,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:52,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:48:52,231 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:48:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052884, now seen corresponding path program 1 times [2021-11-23 02:48:52,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:48:52,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759558104] [2021-11-23 02:48:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:52,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:48:52,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:48:52,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:48:52,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:48:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:52,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:48:52,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:52,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:48:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:52,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:52,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:48:52,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759558104] [2021-11-23 02:48:52,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759558104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:52,357 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:52,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:48:52,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136022099] [2021-11-23 02:48:52,358 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:52,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:48:52,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:48:52,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:48:52,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:48:52,359 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2021-11-23 02:48:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:52,526 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-23 02:48:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:48:52,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 [2021-11-23 02:48:52,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:52,527 INFO L225 Difference]: With dead ends: 37 [2021-11-23 02:48:52,527 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 02:48:52,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:48:52,528 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:52,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:48:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 02:48:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 02:48:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-23 02:48:52,535 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 9 [2021-11-23 02:48:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:52,536 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-23 02:48:52,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2021-11-23 02:48:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-23 02:48:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:48:52,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:52,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:52,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:52,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:48:52,747 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:48:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052885, now seen corresponding path program 1 times [2021-11-23 02:48:52,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:48:52,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163121965] [2021-11-23 02:48:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:52,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:48:52,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:48:52,750 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:48:52,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:48:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:52,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:48:52,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:52,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:48:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:52,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:53,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:48:53,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163121965] [2021-11-23 02:48:53,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163121965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:53,280 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:53,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-23 02:48:53,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091197714] [2021-11-23 02:48:53,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:53,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:48:53,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:48:53,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:48:53,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:48:53,282 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:53,878 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-11-23 02:48:53,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:48:53,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-11-23 02:48:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:53,880 INFO L225 Difference]: With dead ends: 44 [2021-11-23 02:48:53,881 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 02:48:53,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:48:53,882 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 157 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:53,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 43 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:48:53,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 02:48:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-11-23 02:48:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-23 02:48:53,887 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 9 [2021-11-23 02:48:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:53,888 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-23 02:48:53,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:53,888 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-23 02:48:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:48:53,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:53,889 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:53,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:54,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:48:54,094 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:48:54,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:54,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-23 02:48:54,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:48:54,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666706188] [2021-11-23 02:48:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:54,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:48:54,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:48:54,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:48:54,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:48:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:54,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:48:54,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:54,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:54,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:48:54,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666706188] [2021-11-23 02:48:54,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666706188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:48:54,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1987482953] [2021-11-23 02:48:54,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:54,286 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:48:54,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:48:54,294 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:48:54,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 02:48:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:54,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:48:54,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:54,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:54,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1987482953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:48:54,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624517576] [2021-11-23 02:48:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:54,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:54,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:48:54,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:48:54,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:48:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:54,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:48:54,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:54,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:54,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624517576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:48:54,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:48:54,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-23 02:48:54,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21339083] [2021-11-23 02:48:54,581 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:48:54,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:48:54,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:48:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:48:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:48:54,583 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:54,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:54,647 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-11-23 02:48:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:48:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 10 [2021-11-23 02:48:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:54,654 INFO L225 Difference]: With dead ends: 65 [2021-11-23 02:48:54,655 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 02:48:54,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:48:54,656 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:54,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 104 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:48:54,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 02:48:54,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-11-23 02:48:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-23 02:48:54,662 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 10 [2021-11-23 02:48:54,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:54,662 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-23 02:48:54,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-23 02:48:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:48:54,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:54,663 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:54,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-23 02:48:54,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 02:48:55,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:55,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:55,268 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:48:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:55,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-23 02:48:55,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:48:55,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005666604] [2021-11-23 02:48:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:55,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:48:55,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:48:55,270 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:48:55,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 02:48:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:55,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:48:55,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:55,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:48:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:55,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:56,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:48:56,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005666604] [2021-11-23 02:48:56,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005666604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:48:56,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1722542901] [2021-11-23 02:48:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:56,109 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:48:56,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:48:56,110 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:48:56,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 02:48:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:56,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:48:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:56,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:48:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:56,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:56,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1722542901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:48:56,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347447816] [2021-11-23 02:48:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:56,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:48:56,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:48:56,650 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:48:56,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:48:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:48:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:56,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:48:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:56,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:48:57,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347447816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:48:57,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:48:57,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-23 02:48:57,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946289068] [2021-11-23 02:48:57,073 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:48:57,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:48:57,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:48:57,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:48:57,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:48:57,074 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:57,722 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-11-23 02:48:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:48:57,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 10 [2021-11-23 02:48:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:57,724 INFO L225 Difference]: With dead ends: 73 [2021-11-23 02:48:57,724 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 02:48:57,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:48:57,725 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 138 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:57,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 111 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 23 Unchecked, 0.6s Time] [2021-11-23 02:48:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 02:48:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-11-23 02:48:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.302325581395349) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-23 02:48:57,731 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 10 [2021-11-23 02:48:57,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:57,731 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-23 02:48:57,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-23 02:48:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:48:57,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:57,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:57,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:57,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:58,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:58,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:48:58,333 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:48:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:58,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1604187901, now seen corresponding path program 1 times [2021-11-23 02:48:58,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:48:58,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635941749] [2021-11-23 02:48:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:58,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:48:58,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:48:58,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:48:58,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 02:48:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:58,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:48:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:48:58,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:48:58,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:48:58,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635941749] [2021-11-23 02:48:58,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635941749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:58,494 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:58,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-23 02:48:58,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423680260] [2021-11-23 02:48:58,494 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:58,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:48:58,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:48:58,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:48:58,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:48:58,496 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:58,694 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-23 02:48:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:48:58,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 14 [2021-11-23 02:48:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:58,696 INFO L225 Difference]: With dead ends: 57 [2021-11-23 02:48:58,696 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 02:48:58,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:48:58,697 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:58,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 114 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:48:58,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 02:48:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-11-23 02:48:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-11-23 02:48:58,703 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 14 [2021-11-23 02:48:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:58,703 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-11-23 02:48:58,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:48:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-11-23 02:48:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:48:58,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:58,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:58,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:48:58,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:48:58,915 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:48:58,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:58,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2021-11-23 02:48:58,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:48:58,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546774248] [2021-11-23 02:48:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:58,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:48:58,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:48:58,917 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:48:58,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 02:48:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:58,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:48:58,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:48:58,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:48:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:48:59,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:48:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:48:59,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:48:59,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546774248] [2021-11-23 02:48:59,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546774248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:59,935 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:59,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-23 02:48:59,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559553572] [2021-11-23 02:48:59,935 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:59,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:48:59,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:48:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:48:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:48:59,937 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:01,241 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2021-11-23 02:49:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:49:01,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 14 [2021-11-23 02:49:01,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:01,242 INFO L225 Difference]: With dead ends: 78 [2021-11-23 02:49:01,243 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 02:49:01,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:49:01,244 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:01,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 135 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 128 Invalid, 0 Unknown, 25 Unchecked, 0.6s Time] [2021-11-23 02:49:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 02:49:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-11-23 02:49:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-11-23 02:49:01,257 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 14 [2021-11-23 02:49:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:01,258 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-11-23 02:49:01,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-11-23 02:49:01,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:49:01,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:01,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:01,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:01,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:01,471 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:49:01,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:01,472 INFO L85 PathProgramCache]: Analyzing trace with hash 267720213, now seen corresponding path program 1 times [2021-11-23 02:49:01,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:01,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380323025] [2021-11-23 02:49:01,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:01,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:01,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:01,473 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:01,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 02:49:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:01,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:49:01,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:01,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:05,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:05,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380323025] [2021-11-23 02:49:05,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380323025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:05,736 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:05,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:49:05,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993398851] [2021-11-23 02:49:05,737 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:05,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:49:05,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:05,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:49:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-11-23 02:49:05,738 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:05,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:05,851 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-11-23 02:49:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:49:05,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 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 16 [2021-11-23 02:49:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:05,853 INFO L225 Difference]: With dead ends: 58 [2021-11-23 02:49:05,853 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 02:49:05,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-11-23 02:49:05,854 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:05,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 67 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2021-11-23 02:49:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 02:49:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-23 02:49:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-11-23 02:49:05,858 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 16 [2021-11-23 02:49:05,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:05,859 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-11-23 02:49:05,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-11-23 02:49:05,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:49:05,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:05,860 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-23 02:49:05,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:06,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:06,061 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:49:06,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-23 02:49:06,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:06,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619400074] [2021-11-23 02:49:06,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:49:06,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:06,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:06,063 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:06,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 02:49:06,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:49:06,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:49:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:49:06,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:06,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:49:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:06,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:07,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:07,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619400074] [2021-11-23 02:49:07,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619400074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:07,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1627563136] [2021-11-23 02:49:07,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:49:07,794 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:49:07,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:49:07,798 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:49:07,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 02:49:07,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:49:07,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:49:07,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:49:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:07,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:49:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:08,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:08,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1627563136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:08,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504722065] [2021-11-23 02:49:08,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:49:08,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:08,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:08,833 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:08,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 02:49:08,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:49:08,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:49:08,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:49:08,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:08,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:49:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:09,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:10,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504722065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:10,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:49:10,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 24 [2021-11-23 02:49:10,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306624701] [2021-11-23 02:49:10,431 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:49:10,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:49:10,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:10,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:49:10,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:49:10,433 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 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) [2021-11-23 02:49:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:13,686 INFO L93 Difference]: Finished difference Result 191 states and 228 transitions. [2021-11-23 02:49:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:49:13,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 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 18 [2021-11-23 02:49:13,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:13,689 INFO L225 Difference]: With dead ends: 191 [2021-11-23 02:49:13,689 INFO L226 Difference]: Without dead ends: 191 [2021-11-23 02:49:13,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=313, Invalid=743, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:49:13,690 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 610 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:13,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 244 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 340 Invalid, 0 Unknown, 11 Unchecked, 1.7s Time] [2021-11-23 02:49:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-23 02:49:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 61. [2021-11-23 02:49:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.280701754385965) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-11-23 02:49:13,712 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 18 [2021-11-23 02:49:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:13,712 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-11-23 02:49:13,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 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) [2021-11-23 02:49:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-11-23 02:49:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:49:13,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:13,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:13,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:13,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-23 02:49:14,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:14,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:14,317 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:49:14,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash -511718013, now seen corresponding path program 1 times [2021-11-23 02:49:14,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:14,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150541973] [2021-11-23 02:49:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:14,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:14,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:14,318 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:14,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 02:49:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:14,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:49:14,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:14,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:14,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-23 02:49:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:14,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:14,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150541973] [2021-11-23 02:49:14,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150541973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:14,891 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:14,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 02:49:14,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700547590] [2021-11-23 02:49:14,891 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:14,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:49:14,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:14,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:49:14,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:49:14,893 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:15,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:15,203 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2021-11-23 02:49:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:49:15,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 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 18 [2021-11-23 02:49:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:15,205 INFO L225 Difference]: With dead ends: 79 [2021-11-23 02:49:15,205 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 02:49:15,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:49:15,206 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 123 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:15,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 57 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:49:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 02:49:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2021-11-23 02:49:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.263157894736842) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-11-23 02:49:15,212 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 18 [2021-11-23 02:49:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:15,213 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-11-23 02:49:15,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-11-23 02:49:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:49:15,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:15,214 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:15,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:15,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:15,425 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:49:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:15,425 INFO L85 PathProgramCache]: Analyzing trace with hash -511225436, now seen corresponding path program 1 times [2021-11-23 02:49:15,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:15,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583521948] [2021-11-23 02:49:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:15,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:15,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:15,426 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:15,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 02:49:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:15,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:49:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:15,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:49:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:15,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:16,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:16,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583521948] [2021-11-23 02:49:16,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583521948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:16,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2044571108] [2021-11-23 02:49:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:16,644 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:49:16,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:49:16,646 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:49:16,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 02:49:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:49:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:17,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:17,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2044571108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:17,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263461618] [2021-11-23 02:49:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:17,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:17,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:17,614 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:17,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 02:49:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:17,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:49:17,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:17,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:49:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:17,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:18,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263461618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:18,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:49:18,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8, 8, 7, 6] total 25 [2021-11-23 02:49:18,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225380657] [2021-11-23 02:49:18,181 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:49:18,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:49:18,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:18,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:49:18,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:49:18,183 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:22,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:22,465 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2021-11-23 02:49:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:49:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 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 18 [2021-11-23 02:49:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:22,467 INFO L225 Difference]: With dead ends: 77 [2021-11-23 02:49:22,467 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 02:49:22,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:49:22,468 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:22,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 141 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 77 Unchecked, 0.6s Time] [2021-11-23 02:49:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 02:49:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-11-23 02:49:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 71 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2021-11-23 02:49:22,473 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 18 [2021-11-23 02:49:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:22,473 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2021-11-23 02:49:22,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2021-11-23 02:49:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:49:22,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:22,475 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:22,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:22,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-23 02:49:22,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-23 02:49:23,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:23,086 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:49:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:23,086 INFO L85 PathProgramCache]: Analyzing trace with hash -131403199, now seen corresponding path program 1 times [2021-11-23 02:49:23,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:23,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189950450] [2021-11-23 02:49:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:23,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:23,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:23,088 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:23,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 02:49:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:49:23,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:23,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:49:23,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:23,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189950450] [2021-11-23 02:49:23,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189950450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:23,387 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:23,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-11-23 02:49:23,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898650680] [2021-11-23 02:49:23,387 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:23,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:49:23,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:23,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:49:23,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:49:23,388 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:23,801 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2021-11-23 02:49:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:49:23,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 20 [2021-11-23 02:49:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:23,803 INFO L225 Difference]: With dead ends: 94 [2021-11-23 02:49:23,803 INFO L226 Difference]: Without dead ends: 87 [2021-11-23 02:49:23,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:49:23,804 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:23,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 67 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:49:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-23 02:49:23,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-11-23 02:49:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:23,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-11-23 02:49:23,809 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 20 [2021-11-23 02:49:23,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:23,809 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-11-23 02:49:23,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:23,809 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-11-23 02:49:23,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 02:49:23,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:23,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:23,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:24,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:24,017 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:49:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1637861780, now seen corresponding path program 1 times [2021-11-23 02:49:24,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:24,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765717711] [2021-11-23 02:49:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:24,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:24,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:24,020 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:24,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 02:49:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:24,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:49:24,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:24,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:49:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:24,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:25,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:25,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765717711] [2021-11-23 02:49:25,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765717711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:25,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [210360807] [2021-11-23 02:49:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:25,744 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:49:25,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:49:25,757 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:49:25,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 02:49:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:49:25,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:26,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:27,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [210360807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:27,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668832060] [2021-11-23 02:49:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:27,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:27,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:27,232 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:27,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 02:49:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:27,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:49:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:27,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:49:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:27,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:28,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668832060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:28,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:49:28,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 10, 8, 8] total 35 [2021-11-23 02:49:28,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852567985] [2021-11-23 02:49:28,900 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:49:28,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 02:49:28,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:28,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 02:49:28,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 02:49:28,901 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:35,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:35,695 INFO L93 Difference]: Finished difference Result 169 states and 195 transitions. [2021-11-23 02:49:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 02:49:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 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 23 [2021-11-23 02:49:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:35,697 INFO L225 Difference]: With dead ends: 169 [2021-11-23 02:49:35,698 INFO L226 Difference]: Without dead ends: 169 [2021-11-23 02:49:35,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=782, Invalid=3640, Unknown=0, NotChecked=0, Total=4422 [2021-11-23 02:49:35,700 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1049 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:35,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1049 Valid, 191 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 470 Invalid, 0 Unknown, 21 Unchecked, 1.9s Time] [2021-11-23 02:49:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-23 02:49:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 115. [2021-11-23 02:49:35,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 114 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2021-11-23 02:49:35,706 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 23 [2021-11-23 02:49:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:35,706 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2021-11-23 02:49:35,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2021-11-23 02:49:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:49:35,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:35,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:35,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:35,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:36,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:36,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:36,310 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:49:36,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1553234866, now seen corresponding path program 1 times [2021-11-23 02:49:36,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:36,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609888656] [2021-11-23 02:49:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:36,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:36,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:36,312 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:36,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 02:49:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:36,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:49:36,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:36,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:36,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:36,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609888656] [2021-11-23 02:49:36,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609888656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:36,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1858032242] [2021-11-23 02:49:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:36,825 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:49:36,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:49:36,825 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:49:36,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-23 02:49:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:36,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:49:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:37,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:37,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1858032242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:37,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663991257] [2021-11-23 02:49:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:37,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:37,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:37,550 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:37,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 02:49:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:37,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:49:37,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:37,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:49:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:38,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:39,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663991257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:39,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:49:39,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11, 10, 7, 6] total 36 [2021-11-23 02:49:39,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154615336] [2021-11-23 02:49:39,257 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:49:39,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 02:49:39,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:39,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 02:49:39,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 02:49:39,259 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:44,082 INFO L93 Difference]: Finished difference Result 154 states and 178 transitions. [2021-11-23 02:49:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 02:49:44,083 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 0 states have call successors, (0), 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 26 [2021-11-23 02:49:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:44,084 INFO L225 Difference]: With dead ends: 154 [2021-11-23 02:49:44,084 INFO L226 Difference]: Without dead ends: 141 [2021-11-23 02:49:44,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 02:49:44,087 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:44,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 199 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2021-11-23 02:49:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-23 02:49:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-11-23 02:49:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 132 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2021-11-23 02:49:44,092 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 26 [2021-11-23 02:49:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:44,092 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2021-11-23 02:49:44,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2021-11-23 02:49:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:49:44,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:44,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:44,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:44,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:44,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:44,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:49:44,710 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:49:44,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:44,710 INFO L85 PathProgramCache]: Analyzing trace with hash 156266035, now seen corresponding path program 1 times [2021-11-23 02:49:44,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:44,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809207328] [2021-11-23 02:49:44,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:44,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:44,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:44,712 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:44,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 02:49:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:44,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:49:44,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:44,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:49:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:49:45,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:49:46,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:46,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809207328] [2021-11-23 02:49:46,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809207328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:46,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1450059443] [2021-11-23 02:49:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:46,841 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:49:46,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:49:46,846 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:49:46,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-23 02:49:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:47,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:49:47,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:47,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:49:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:47,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:49:49,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1450059443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499376697] [2021-11-23 02:49:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:49,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:49,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:49,469 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:49,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 02:49:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:49,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:49:49,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:49,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:49:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:49:49,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:49:50,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499376697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:50,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:49:50,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 11, 10, 7, 6] total 28 [2021-11-23 02:49:50,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345835868] [2021-11-23 02:49:50,448 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:49:50,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 02:49:50,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:50,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 02:49:50,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:49:50,449 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:52,178 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2021-11-23 02:49:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:49:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-23 02:49:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:52,180 INFO L225 Difference]: With dead ends: 151 [2021-11-23 02:49:52,180 INFO L226 Difference]: Without dead ends: 151 [2021-11-23 02:49:52,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 02:49:52,182 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 105 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:52,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 195 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 166 Invalid, 0 Unknown, 48 Unchecked, 0.6s Time] [2021-11-23 02:49:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-23 02:49:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2021-11-23 02:49:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 132 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2021-11-23 02:49:52,189 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 32 [2021-11-23 02:49:52,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:52,190 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2021-11-23 02:49:52,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2021-11-23 02:49:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:49:52,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:52,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:52,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:52,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:52,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:52,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:49:52,796 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:49:52,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash -823961093, now seen corresponding path program 1 times [2021-11-23 02:49:52,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:52,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582647093] [2021-11-23 02:49:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:52,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:52,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:52,798 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:52,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 02:49:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:52,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:49:52,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:53,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:53,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:49:53,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582647093] [2021-11-23 02:49:53,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582647093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:53,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1908817334] [2021-11-23 02:49:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:53,351 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:49:53,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:49:53,352 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:49:53,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 02:49:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:53,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:49:53,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:53,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:49:54,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1908817334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:54,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764165751] [2021-11-23 02:49:54,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:54,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:54,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:54,122 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:54,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 02:49:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:54,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:49:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:54,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:49:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:54,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:55,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764165751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:55,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:49:55,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11, 10, 7, 6] total 36 [2021-11-23 02:49:55,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220314504] [2021-11-23 02:49:55,938 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:49:55,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 02:49:55,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:49:55,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 02:49:55,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 02:49:55,941 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:59,026 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2021-11-23 02:49:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 02:49:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-23 02:49:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:59,028 INFO L225 Difference]: With dead ends: 133 [2021-11-23 02:49:59,028 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 02:49:59,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 02:49:59,030 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:59,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 158 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2021-11-23 02:49:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 02:49:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2021-11-23 02:49:59,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 88 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2021-11-23 02:49:59,033 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 32 [2021-11-23 02:49:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:59,034 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2021-11-23 02:49:59,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:49:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2021-11-23 02:49:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 02:49:59,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:59,035 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-23 02:49:59,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:59,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:59,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:59,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:59,643 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:49:59,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:59,643 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-23 02:49:59,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:49:59,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397853100] [2021-11-23 02:49:59,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:49:59,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:49:59,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:49:59,650 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:49:59,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 02:49:59,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 02:49:59,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:49:59,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:49:59,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:59,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:50:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:00,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:02,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:50:02,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397853100] [2021-11-23 02:50:02,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397853100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:50:02,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575636709] [2021-11-23 02:50:02,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:50:02,574 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:50:02,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:50:02,574 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:50:02,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-23 02:50:02,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 02:50:02,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:50:02,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:50:02,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:02,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:50:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:03,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:12,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1575636709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:50:12,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136785916] [2021-11-23 02:50:12,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:50:12,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:12,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:12,395 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:50:12,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 02:50:13,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 02:50:13,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:50:13,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:50:13,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:13,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:50:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:14,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:50:20,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136785916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:50:20,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:50:20,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13, 15, 14, 14] total 54 [2021-11-23 02:50:20,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957712742] [2021-11-23 02:50:20,053 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:50:20,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-23 02:50:20,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:50:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-23 02:50:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2152, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 02:50:20,056 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:50:25,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:27,202 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:28,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:30,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:35,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:37,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:39,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:41,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:46,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:48,016 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:49,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:58,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:58,569 INFO L93 Difference]: Finished difference Result 715 states and 800 transitions. [2021-11-23 02:50:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 02:50:58,571 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 02:50:58,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:58,575 INFO L225 Difference]: With dead ends: 715 [2021-11-23 02:50:58,575 INFO L226 Difference]: Without dead ends: 715 [2021-11-23 02:50:58,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=1458, Invalid=3654, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 02:50:58,578 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 2129 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 85 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2129 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:58,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2129 Valid, 938 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1326 Invalid, 9 Unknown, 31 Unchecked, 27.5s Time] [2021-11-23 02:50:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-11-23 02:50:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 121. [2021-11-23 02:50:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 118 states have (on average 1.1864406779661016) internal successors, (140), 120 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:50:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2021-11-23 02:50:58,586 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 34 [2021-11-23 02:50:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:58,586 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2021-11-23 02:50:58,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:50:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2021-11-23 02:50:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:50:58,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:58,588 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:58,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:58,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:59,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:59,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:59,198 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:50:59,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:59,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1302514410, now seen corresponding path program 2 times [2021-11-23 02:50:59,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:50:59,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283304455] [2021-11-23 02:50:59,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:50:59,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:50:59,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:50:59,200 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:50:59,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 02:50:59,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:50:59,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:50:59,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:50:59,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:59,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:51:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:51:01,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:51:03,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:51:03,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283304455] [2021-11-23 02:51:03,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283304455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:03,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [907634385] [2021-11-23 02:51:03,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:51:03,090 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:51:03,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:51:03,091 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:51:03,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-23 02:51:03,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:51:03,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:51:03,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:51:03,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:51:04,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:51:05,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [907634385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:05,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214167940] [2021-11-23 02:51:05,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:51:05,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:05,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:05,611 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:05,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-23 02:51:05,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:51:05,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:51:05,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:51:05,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:05,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:51:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:51:06,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:51:09,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214167940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:09,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:51:09,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 14, 12, 10, 9] total 44 [2021-11-23 02:51:09,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505063357] [2021-11-23 02:51:09,016 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:51:09,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 02:51:09,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:51:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 02:51:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 02:51:09,018 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand has 44 states, 44 states have (on average 3.090909090909091) internal successors, (136), 44 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:17,946 INFO L93 Difference]: Finished difference Result 175 states and 206 transitions. [2021-11-23 02:51:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 02:51:17,946 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.090909090909091) internal successors, (136), 44 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 02:51:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:17,947 INFO L225 Difference]: With dead ends: 175 [2021-11-23 02:51:17,947 INFO L226 Difference]: Without dead ends: 175 [2021-11-23 02:51:17,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=644, Invalid=4186, Unknown=0, NotChecked=0, Total=4830 [2021-11-23 02:51:17,950 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:17,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 338 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 32 Unchecked, 0.4s Time] [2021-11-23 02:51:17,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-23 02:51:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 162. [2021-11-23 02:51:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 159 states have (on average 1.2327044025157232) internal successors, (196), 161 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 196 transitions. [2021-11-23 02:51:17,956 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 196 transitions. Word has length 36 [2021-11-23 02:51:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:17,956 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 196 transitions. [2021-11-23 02:51:17,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.090909090909091) internal successors, (136), 44 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 196 transitions. [2021-11-23 02:51:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 02:51:17,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:17,957 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:17,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-23 02:51:18,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-11-23 02:51:18,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:18,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:51:18,562 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:51:18,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash -710345958, now seen corresponding path program 1 times [2021-11-23 02:51:18,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:51:18,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396334888] [2021-11-23 02:51:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:18,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:51:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:51:18,564 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:51:18,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 02:51:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:18,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:51:18,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:51:18,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:51:19,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:51:19,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396334888] [2021-11-23 02:51:19,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396334888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:19,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2006034161] [2021-11-23 02:51:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:19,465 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:51:19,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:51:19,469 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:51:19,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-23 02:51:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:19,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:51:19,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:51:20,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:51:21,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2006034161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:21,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635367353] [2021-11-23 02:51:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:21,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:21,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:21,151 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:21,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-23 02:51:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:21,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:51:21,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:21,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:51:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:51:24,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:51:26,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635367353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:26,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:51:26,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14, 13, 8, 7] total 46 [2021-11-23 02:51:26,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278302615] [2021-11-23 02:51:26,123 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:51:26,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 02:51:26,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:51:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 02:51:26,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:51:26,125 INFO L87 Difference]: Start difference. First operand 162 states and 196 transitions. Second operand has 46 states, 46 states have (on average 3.369565217391304) internal successors, (155), 46 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:32,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:32,211 INFO L93 Difference]: Finished difference Result 229 states and 275 transitions. [2021-11-23 02:51:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 02:51:32,211 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.369565217391304) internal successors, (155), 46 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 02:51:32,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:32,212 INFO L225 Difference]: With dead ends: 229 [2021-11-23 02:51:32,212 INFO L226 Difference]: Without dead ends: 223 [2021-11-23 02:51:32,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 203 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=756, Invalid=5406, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 02:51:32,214 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:32,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 354 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 56 Unchecked, 0.5s Time] [2021-11-23 02:51:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-23 02:51:32,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 196. [2021-11-23 02:51:32,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 193 states have (on average 1.2590673575129534) internal successors, (243), 195 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 243 transitions. [2021-11-23 02:51:32,221 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 243 transitions. Word has length 39 [2021-11-23 02:51:32,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:32,221 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 243 transitions. [2021-11-23 02:51:32,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.369565217391304) internal successors, (155), 46 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:51:32,221 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 243 transitions. [2021-11-23 02:51:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:51:32,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:32,222 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:32,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:32,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:32,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:32,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:51:32,830 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:51:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash 799217830, now seen corresponding path program 2 times [2021-11-23 02:51:32,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:51:32,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211196784] [2021-11-23 02:51:32,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:51:32,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:51:32,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:51:32,831 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:51:32,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 02:51:32,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:51:32,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:51:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:51:32,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:32,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:51:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:51:33,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:51:36,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:51:36,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211196784] [2021-11-23 02:51:36,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211196784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:36,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [337729466] [2021-11-23 02:51:36,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:51:36,180 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:51:36,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:51:36,181 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:51:36,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-23 02:51:36,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:51:36,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:51:36,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:51:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:36,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:51:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:38,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:41,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [337729466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:41,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684587322] [2021-11-23 02:51:41,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:51:41,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:41,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:41,269 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:41,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-23 02:51:41,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:51:41,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:51:41,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:51:41,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:41,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:51:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:51:42,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:51:47,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684587322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:47,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:51:47,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 15, 15, 10, 11] total 54 [2021-11-23 02:51:47,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471922737] [2021-11-23 02:51:47,008 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:51:47,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-23 02:51:47,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:51:47,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-23 02:51:47,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2477, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 02:51:47,010 INFO L87 Difference]: Start difference. First operand 196 states and 243 transitions. Second operand has 54 states, 54 states have (on average 3.1296296296296298) internal successors, (169), 54 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:49,995 INFO L93 Difference]: Finished difference Result 732 states and 880 transitions. [2021-11-23 02:52:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-23 02:52:49,996 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.1296296296296298) internal successors, (169), 54 states have internal predecessors, (169), 0 states have call successors, (0), 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 41 [2021-11-23 02:52:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:49,999 INFO L225 Difference]: With dead ends: 732 [2021-11-23 02:52:49,999 INFO L226 Difference]: Without dead ends: 729 [2021-11-23 02:52:50,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6144 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=2975, Invalid=15657, Unknown=0, NotChecked=0, Total=18632 [2021-11-23 02:52:50,006 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2840 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2840 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:50,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2840 Valid, 871 Invalid, 2973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 2415 Invalid, 0 Unknown, 131 Unchecked, 17.5s Time] [2021-11-23 02:52:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-11-23 02:52:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 393. [2021-11-23 02:52:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 390 states have (on average 1.2333333333333334) internal successors, (481), 392 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 481 transitions. [2021-11-23 02:52:50,038 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 481 transitions. Word has length 41 [2021-11-23 02:52:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:50,039 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 481 transitions. [2021-11-23 02:52:50,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.1296296296296298) internal successors, (169), 54 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 481 transitions. [2021-11-23 02:52:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:52:50,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:50,041 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:50,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2021-11-23 02:52:50,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-23 02:52:50,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-23 02:52:50,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:52:50,644 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:52:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:50,645 INFO L85 PathProgramCache]: Analyzing trace with hash 207140145, now seen corresponding path program 1 times [2021-11-23 02:52:50,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:52:50,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161135551] [2021-11-23 02:52:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:50,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:52:50,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:52:50,647 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:52:50,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 02:52:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:50,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:52:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:52:51,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:52:51,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:52:51,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161135551] [2021-11-23 02:52:51,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161135551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:52:51,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1348170520] [2021-11-23 02:52:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:51,813 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:52:51,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:52:51,814 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:52:51,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-23 02:52:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:51,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:52:51,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:52:52,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:52:53,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1348170520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:52:53,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667915260] [2021-11-23 02:52:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:53,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:52:53,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:52:53,527 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:52:53,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-23 02:52:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:53,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:52:53,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:53,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:52:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:52:54,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:52:56,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667915260] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:52:56,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:52:56,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14, 13, 8, 7] total 46 [2021-11-23 02:52:56,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339596864] [2021-11-23 02:52:56,616 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:52:56,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 02:52:56,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:52:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 02:52:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:52:56,617 INFO L87 Difference]: Start difference. First operand 393 states and 481 transitions. Second operand has 46 states, 46 states have (on average 4.239130434782608) internal successors, (195), 46 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:02,206 INFO L93 Difference]: Finished difference Result 525 states and 634 transitions. [2021-11-23 02:53:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 02:53:02,207 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.239130434782608) internal successors, (195), 46 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-23 02:53:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:02,209 INFO L225 Difference]: With dead ends: 525 [2021-11-23 02:53:02,210 INFO L226 Difference]: Without dead ends: 519 [2021-11-23 02:53:02,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 253 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=850, Invalid=5792, Unknown=0, NotChecked=0, Total=6642 [2021-11-23 02:53:02,211 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 127 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:02,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 324 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-11-23 02:53:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-23 02:53:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 423. [2021-11-23 02:53:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 420 states have (on average 1.2047619047619047) internal successors, (506), 422 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 506 transitions. [2021-11-23 02:53:02,224 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 506 transitions. Word has length 45 [2021-11-23 02:53:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:02,224 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 506 transitions. [2021-11-23 02:53:02,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.239130434782608) internal successors, (195), 46 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 506 transitions. [2021-11-23 02:53:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:53:02,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:02,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:02,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-23 02:53:02,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-23 02:53:02,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-23 02:53:02,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:53:02,829 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:53:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:02,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1655856976, now seen corresponding path program 1 times [2021-11-23 02:53:02,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:53:02,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316301972] [2021-11-23 02:53:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:02,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:53:02,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:53:02,831 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:53:02,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-23 02:53:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:02,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:53:02,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:53:03,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:53:03,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:53:03,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316301972] [2021-11-23 02:53:03,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316301972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:53:03,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821930166] [2021-11-23 02:53:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:03,766 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:53:03,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:53:03,767 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:53:03,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-23 02:53:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:03,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:53:03,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:53:04,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:53:05,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [821930166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:53:05,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80386487] [2021-11-23 02:53:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:05,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:53:05,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:53:05,438 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:53:05,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-23 02:53:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:05,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:53:05,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:05,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:53:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:53:08,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:53:12,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80386487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:53:12,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:53:12,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14, 13, 10, 10] total 51 [2021-11-23 02:53:12,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137439725] [2021-11-23 02:53:12,229 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:53:12,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 02:53:12,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:53:12,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 02:53:12,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2283, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 02:53:12,230 INFO L87 Difference]: Start difference. First operand 423 states and 506 transitions. Second operand has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:21,734 INFO L93 Difference]: Finished difference Result 581 states and 684 transitions. [2021-11-23 02:53:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-23 02:53:21,734 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 0 states have call successors, (0), 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 46 [2021-11-23 02:53:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:21,737 INFO L225 Difference]: With dead ends: 581 [2021-11-23 02:53:21,737 INFO L226 Difference]: Without dead ends: 537 [2021-11-23 02:53:21,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=846, Invalid=6986, Unknown=0, NotChecked=0, Total=7832 [2021-11-23 02:53:21,739 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 98 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:21,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 542 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 196 Invalid, 0 Unknown, 53 Unchecked, 0.7s Time] [2021-11-23 02:53:21,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-23 02:53:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 514. [2021-11-23 02:53:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 511 states have (on average 1.203522504892368) internal successors, (615), 513 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 615 transitions. [2021-11-23 02:53:21,753 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 615 transitions. Word has length 46 [2021-11-23 02:53:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:21,753 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 615 transitions. [2021-11-23 02:53:21,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 615 transitions. [2021-11-23 02:53:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:53:21,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:21,755 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:21,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-23 02:53:21,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-23 02:53:22,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-23 02:53:22,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:53:22,371 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:53:22,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:22,371 INFO L85 PathProgramCache]: Analyzing trace with hash 549084729, now seen corresponding path program 1 times [2021-11-23 02:53:22,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:53:22,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939364028] [2021-11-23 02:53:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:22,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:53:22,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:53:22,373 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:53:22,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 02:53:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:22,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:53:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:22,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:53:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:53:23,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:53:25,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:53:25,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939364028] [2021-11-23 02:53:25,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939364028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:53:25,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1809842753] [2021-11-23 02:53:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:25,400 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:53:25,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:53:25,400 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:53:25,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-23 02:53:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:25,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:53:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:25,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:53:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:53:27,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:53:30,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1809842753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:53:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963357949] [2021-11-23 02:53:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:30,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:53:30,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:53:30,713 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:53:30,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-23 02:53:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:53:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:30,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:53:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:53:31,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:53:34,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963357949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:53:34,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:53:34,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 15, 14, 10, 9] total 46 [2021-11-23 02:53:34,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685872119] [2021-11-23 02:53:34,527 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:53:34,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 02:53:34,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:53:34,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 02:53:34,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1837, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:53:34,528 INFO L87 Difference]: Start difference. First operand 514 states and 615 transitions. Second operand has 47 states, 46 states have (on average 4.0) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:41,298 INFO L93 Difference]: Finished difference Result 648 states and 778 transitions. [2021-11-23 02:53:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-23 02:53:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.0) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 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 50 [2021-11-23 02:53:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:41,314 INFO L225 Difference]: With dead ends: 648 [2021-11-23 02:53:41,314 INFO L226 Difference]: Without dead ends: 648 [2021-11-23 02:53:41,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 253 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=715, Invalid=3841, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 02:53:41,316 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 150 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:41,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 626 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 207 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2021-11-23 02:53:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-23 02:53:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 564. [2021-11-23 02:53:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 561 states have (on average 1.2156862745098038) internal successors, (682), 563 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 682 transitions. [2021-11-23 02:53:41,335 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 682 transitions. Word has length 50 [2021-11-23 02:53:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:41,335 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 682 transitions. [2021-11-23 02:53:41,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.0) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 682 transitions. [2021-11-23 02:53:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:53:41,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:41,337 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:41,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-23 02:53:41,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2021-11-23 02:53:41,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-11-23 02:53:41,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:53:41,950 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:53:41,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:41,950 INFO L85 PathProgramCache]: Analyzing trace with hash -870370425, now seen corresponding path program 2 times [2021-11-23 02:53:41,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:53:41,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619181101] [2021-11-23 02:53:41,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:53:41,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:53:41,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:53:41,951 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:53:41,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-23 02:53:42,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:53:42,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:53:42,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:53:42,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:42,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:53:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:53:43,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:53:45,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:53:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619181101] [2021-11-23 02:53:45,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619181101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:53:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1619097660] [2021-11-23 02:53:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:53:45,313 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:53:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:53:45,314 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:53:45,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-23 02:53:45,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:53:45,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:53:45,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:53:45,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:45,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:53:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:53:47,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:53:50,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1619097660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:53:50,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024862808] [2021-11-23 02:53:50,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:53:50,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:53:50,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:53:50,719 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:53:50,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-23 02:53:50,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:53:50,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:53:50,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:53:50,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:50,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:53:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:53:51,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:53:54,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024862808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:53:54,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:53:54,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 15, 14, 10, 9] total 46 [2021-11-23 02:53:54,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218429880] [2021-11-23 02:53:54,376 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:53:54,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 02:53:54,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:53:54,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 02:53:54,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1837, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:53:54,377 INFO L87 Difference]: Start difference. First operand 564 states and 682 transitions. Second operand has 47 states, 46 states have (on average 4.0) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:09,237 INFO L93 Difference]: Finished difference Result 983 states and 1173 transitions. [2021-11-23 02:54:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-23 02:54:09,238 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.0) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 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 50 [2021-11-23 02:54:09,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:09,242 INFO L225 Difference]: With dead ends: 983 [2021-11-23 02:54:09,242 INFO L226 Difference]: Without dead ends: 980 [2021-11-23 02:54:09,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 252 SyntacticMatches, 20 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=928, Invalid=4772, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 02:54:09,244 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 279 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:09,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 718 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 325 Invalid, 0 Unknown, 323 Unchecked, 1.4s Time] [2021-11-23 02:54:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-11-23 02:54:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 840. [2021-11-23 02:54:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 837 states have (on average 1.2126642771804061) internal successors, (1015), 839 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1015 transitions. [2021-11-23 02:54:09,278 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1015 transitions. Word has length 50 [2021-11-23 02:54:09,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:09,279 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1015 transitions. [2021-11-23 02:54:09,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.0) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1015 transitions. [2021-11-23 02:54:09,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 02:54:09,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:09,281 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:09,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:09,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-23 02:54:09,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-11-23 02:54:09,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:54:09,883 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:54:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:09,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1133751993, now seen corresponding path program 2 times [2021-11-23 02:54:09,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:54:09,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856703223] [2021-11-23 02:54:09,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:54:09,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:54:09,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:54:09,885 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:54:09,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-23 02:54:09,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:54:09,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:54:09,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:54:09,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:54:10,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:54:10,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:54:10,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856703223] [2021-11-23 02:54:10,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856703223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:54:10,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2076035886] [2021-11-23 02:54:10,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:54:10,931 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:54:10,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:54:10,937 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:54:10,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-23 02:54:11,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:54:11,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:54:11,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:54:11,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:11,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:54:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:54:12,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:54:16,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2076035886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:54:16,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445960118] [2021-11-23 02:54:16,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:54:16,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:16,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:16,450 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:16,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-23 02:54:16,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:54:16,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:54:16,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:54:16,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:16,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:54:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:54:18,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:54:20,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445960118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:54:20,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:54:20,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 12, 9, 9] total 52 [2021-11-23 02:54:20,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819856825] [2021-11-23 02:54:20,556 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:54:20,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 02:54:20,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:54:20,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 02:54:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2349, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:54:20,558 INFO L87 Difference]: Start difference. First operand 840 states and 1015 transitions. Second operand has 52 states, 52 states have (on average 4.5576923076923075) internal successors, (237), 52 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:27,582 INFO L93 Difference]: Finished difference Result 879 states and 1033 transitions. [2021-11-23 02:54:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-23 02:54:27,583 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.5576923076923075) internal successors, (237), 52 states have internal predecessors, (237), 0 states have call successors, (0), 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 52 [2021-11-23 02:54:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:27,586 INFO L225 Difference]: With dead ends: 879 [2021-11-23 02:54:27,586 INFO L226 Difference]: Without dead ends: 819 [2021-11-23 02:54:27,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 285 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1113, Invalid=7259, Unknown=0, NotChecked=0, Total=8372 [2021-11-23 02:54:27,587 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 152 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:27,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 431 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 205 Invalid, 0 Unknown, 54 Unchecked, 0.5s Time] [2021-11-23 02:54:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-11-23 02:54:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 721. [2021-11-23 02:54:27,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 718 states have (on average 1.1866295264623956) internal successors, (852), 720 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:27,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 852 transitions. [2021-11-23 02:54:27,604 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 852 transitions. Word has length 52 [2021-11-23 02:54:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:27,605 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 852 transitions. [2021-11-23 02:54:27,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.5576923076923075) internal successors, (237), 52 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 852 transitions. [2021-11-23 02:54:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:54:27,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:27,607 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:27,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:27,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:28,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2021-11-23 02:54:28,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:54:28,231 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:54:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash 866794523, now seen corresponding path program 2 times [2021-11-23 02:54:28,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:54:28,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855332938] [2021-11-23 02:54:28,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:54:28,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:54:28,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:54:28,233 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:54:28,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-23 02:54:28,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:54:28,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:54:28,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:54:28,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:54:28,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:54:29,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:54:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855332938] [2021-11-23 02:54:29,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855332938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:54:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [786334950] [2021-11-23 02:54:29,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:54:29,823 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:54:29,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:54:29,824 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:54:29,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-11-23 02:54:29,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:54:29,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:54:29,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:54:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 5 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:54:30,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 5 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:54:31,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [786334950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:54:31,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301068768] [2021-11-23 02:54:31,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:54:31,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:31,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:31,613 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:31,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-23 02:54:31,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:54:31,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:54:31,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:54:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:31,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:54:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:54:33,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:54:37,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301068768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:54:37,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:54:37,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15, 14, 11, 11] total 59 [2021-11-23 02:54:37,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821071858] [2021-11-23 02:54:37,235 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:54:37,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-23 02:54:37,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:54:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-23 02:54:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=3065, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 02:54:37,236 INFO L87 Difference]: Start difference. First operand 721 states and 852 transitions. Second operand has 59 states, 59 states have (on average 3.5084745762711864) internal successors, (207), 59 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:59,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:59,304 INFO L93 Difference]: Finished difference Result 902 states and 1067 transitions. [2021-11-23 02:54:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-23 02:54:59,305 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.5084745762711864) internal successors, (207), 59 states have internal predecessors, (207), 0 states have call successors, (0), 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 53 [2021-11-23 02:54:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:59,308 INFO L225 Difference]: With dead ends: 902 [2021-11-23 02:54:59,308 INFO L226 Difference]: Without dead ends: 894 [2021-11-23 02:54:59,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 279 SyntacticMatches, 12 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6263 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=2250, Invalid=15306, Unknown=0, NotChecked=0, Total=17556 [2021-11-23 02:54:59,310 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 162 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:59,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 886 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 403 Invalid, 0 Unknown, 157 Unchecked, 2.0s Time] [2021-11-23 02:54:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-11-23 02:54:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 844. [2021-11-23 02:54:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 841 states have (on average 1.2045184304399525) internal successors, (1013), 843 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1013 transitions. [2021-11-23 02:54:59,329 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1013 transitions. Word has length 53 [2021-11-23 02:54:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:59,330 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1013 transitions. [2021-11-23 02:54:59,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.5084745762711864) internal successors, (207), 59 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1013 transitions. [2021-11-23 02:54:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:54:59,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:59,332 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:59,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:59,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:59,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:59,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:54:59,946 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:54:59,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:59,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1441173904, now seen corresponding path program 3 times [2021-11-23 02:54:59,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:54:59,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508157701] [2021-11-23 02:54:59,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:54:59,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:54:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:54:59,948 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:54:59,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-23 02:55:00,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:55:00,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:55:00,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:55:00,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:00,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:55:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:55:01,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:55:04,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:55:04,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508157701] [2021-11-23 02:55:04,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508157701] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:55:04,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:55:04,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2021-11-23 02:55:04,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447204089] [2021-11-23 02:55:04,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:04,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:55:04,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:55:04,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:55:04,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:55:04,407 INFO L87 Difference]: Start difference. First operand 844 states and 1013 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:04,526 INFO L93 Difference]: Finished difference Result 888 states and 1064 transitions. [2021-11-23 02:55:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:55:04,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 02:55:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:04,529 INFO L225 Difference]: With dead ends: 888 [2021-11-23 02:55:04,529 INFO L226 Difference]: Without dead ends: 888 [2021-11-23 02:55:04,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:55:04,530 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:04,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 83 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2021-11-23 02:55:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-11-23 02:55:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 749. [2021-11-23 02:55:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 746 states have (on average 1.195710455764075) internal successors, (892), 748 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 892 transitions. [2021-11-23 02:55:04,547 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 892 transitions. Word has length 56 [2021-11-23 02:55:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:04,547 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 892 transitions. [2021-11-23 02:55:04,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 892 transitions. [2021-11-23 02:55:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 02:55:04,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:04,549 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:04,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2021-11-23 02:55:04,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:55:04,760 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:55:04,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:04,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1318339206, now seen corresponding path program 3 times [2021-11-23 02:55:04,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:55:04,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383901353] [2021-11-23 02:55:04,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:55:04,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:55:04,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:55:04,761 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:55:04,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-23 02:55:04,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:55:04,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:55:04,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:55:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:04,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:55:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 02:55:05,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 02:55:09,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:55:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383901353] [2021-11-23 02:55:09,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383901353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:09,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [448580968] [2021-11-23 02:55:09,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:55:09,368 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:55:09,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:55:09,369 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:55:09,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2021-11-23 02:55:09,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:55:09,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:55:09,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:55:09,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:09,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:55:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 02:55:10,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 02:55:15,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [448580968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:15,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622068309] [2021-11-23 02:55:15,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:55:15,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:15,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:15,231 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:15,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-23 02:55:15,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:55:15,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:55:15,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:55:15,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:15,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:55:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 02:55:16,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 02:55:18,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622068309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:18,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:55:18,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10, 12, 10, 11] total 29 [2021-11-23 02:55:18,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533806927] [2021-11-23 02:55:18,407 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:55:18,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 02:55:18,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:55:18,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 02:55:18,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:55:18,408 INFO L87 Difference]: Start difference. First operand 749 states and 892 transitions. Second operand has 30 states, 29 states have (on average 4.068965517241379) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:39,011 INFO L93 Difference]: Finished difference Result 1071 states and 1264 transitions. [2021-11-23 02:55:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-23 02:55:39,013 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.068965517241379) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-23 02:55:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:39,017 INFO L225 Difference]: With dead ends: 1071 [2021-11-23 02:55:39,017 INFO L226 Difference]: Without dead ends: 1071 [2021-11-23 02:55:39,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 323 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=1610, Invalid=4870, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 02:55:39,018 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 918 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:39,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 286 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 571 Invalid, 0 Unknown, 93 Unchecked, 4.2s Time] [2021-11-23 02:55:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-11-23 02:55:39,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 795. [2021-11-23 02:55:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 792 states have (on average 1.1906565656565657) internal successors, (943), 794 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 943 transitions. [2021-11-23 02:55:39,034 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 943 transitions. Word has length 59 [2021-11-23 02:55:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:39,034 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 943 transitions. [2021-11-23 02:55:39,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.068965517241379) internal successors, (118), 30 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 943 transitions. [2021-11-23 02:55:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 02:55:39,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:39,036 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:39,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-23 02:55:39,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2021-11-23 02:55:39,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2021-11-23 02:55:39,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:55:39,662 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:55:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1880435634, now seen corresponding path program 2 times [2021-11-23 02:55:39,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:55:39,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540440098] [2021-11-23 02:55:39,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:55:39,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:55:39,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:55:39,663 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:55:39,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-23 02:55:39,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:55:39,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:55:39,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:55:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:55:40,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:55:41,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:55:41,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540440098] [2021-11-23 02:55:41,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540440098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:41,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1656616410] [2021-11-23 02:55:41,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:55:41,439 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:55:41,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:55:41,440 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:55:41,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2021-11-23 02:55:41,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:55:41,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:55:41,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:55:41,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 5 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:55:42,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 5 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:55:43,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1656616410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:43,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846335682] [2021-11-23 02:55:43,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:55:43,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:43,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:43,434 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:43,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-23 02:55:43,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:55:43,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:55:43,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:55:43,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:43,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:55:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:55:45,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:55:49,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846335682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:49,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:55:49,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15, 14, 11, 11] total 59 [2021-11-23 02:55:49,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498411080] [2021-11-23 02:55:49,220 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:55:49,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-23 02:55:49,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:55:49,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-23 02:55:49,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=3065, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 02:55:49,221 INFO L87 Difference]: Start difference. First operand 795 states and 943 transitions. Second operand has 59 states, 59 states have (on average 4.1525423728813555) internal successors, (245), 59 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:56:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:49,335 INFO L93 Difference]: Finished difference Result 1732 states and 2009 transitions. [2021-11-23 02:56:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-11-23 02:56:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 4.1525423728813555) internal successors, (245), 59 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-23 02:56:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:49,343 INFO L225 Difference]: With dead ends: 1732 [2021-11-23 02:56:49,343 INFO L226 Difference]: Without dead ends: 1715 [2021-11-23 02:56:49,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 358 SyntacticMatches, 28 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19526 ImplicationChecksByTransitivity, 60.5s TimeCoverageRelationStatistics Valid=5498, Invalid=41374, Unknown=0, NotChecked=0, Total=46872 [2021-11-23 02:56:49,354 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 503 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:49,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 903 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 895 Invalid, 0 Unknown, 223 Unchecked, 5.2s Time] [2021-11-23 02:56:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-11-23 02:56:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1049. [2021-11-23 02:56:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1046 states have (on average 1.178776290630975) internal successors, (1233), 1048 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:56:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1233 transitions. [2021-11-23 02:56:49,379 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1233 transitions. Word has length 59 [2021-11-23 02:56:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:49,379 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1233 transitions. [2021-11-23 02:56:49,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 4.1525423728813555) internal successors, (245), 59 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:56:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1233 transitions. [2021-11-23 02:56:49,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 02:56:49,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:49,382 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:49,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2021-11-23 02:56:49,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:49,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-23 02:56:49,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:49,985 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:56:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:49,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1146185791, now seen corresponding path program 3 times [2021-11-23 02:56:49,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:49,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352429381] [2021-11-23 02:56:49,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:56:49,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:49,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:49,986 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:49,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-23 02:56:50,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:56:50,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:56:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:56:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:50,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 02:56:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-23 02:56:50,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-23 02:56:53,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:53,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352429381] [2021-11-23 02:56:53,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352429381] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:56:53,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:56:53,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2021-11-23 02:56:53,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585561163] [2021-11-23 02:56:53,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:53,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:56:53,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:53,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:56:53,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:56:53,546 INFO L87 Difference]: Start difference. First operand 1049 states and 1233 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:56:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:53,601 INFO L93 Difference]: Finished difference Result 1107 states and 1292 transitions. [2021-11-23 02:56:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:56:53,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 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 63 [2021-11-23 02:56:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:53,605 INFO L225 Difference]: With dead ends: 1107 [2021-11-23 02:56:53,605 INFO L226 Difference]: Without dead ends: 1106 [2021-11-23 02:56:53,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:56:53,605 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:53,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 52 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2021-11-23 02:56:53,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-11-23 02:56:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 580. [2021-11-23 02:56:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 578 states have (on average 1.1505190311418685) internal successors, (665), 579 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:56:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 665 transitions. [2021-11-23 02:56:53,618 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 665 transitions. Word has length 63 [2021-11-23 02:56:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:53,618 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 665 transitions. [2021-11-23 02:56:53,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:56:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 665 transitions. [2021-11-23 02:56:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 02:56:53,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:53,620 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:53,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:53,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:53,831 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 02:56:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash 824030467, now seen corresponding path program 3 times [2021-11-23 02:56:53,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:53,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364333467] [2021-11-23 02:56:53,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:56:53,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:53,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:53,833 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:53,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-11-23 02:56:54,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 02:56:54,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:56:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:56:54,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:54,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:56:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 100 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:56:56,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:01,037 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_bubbleSort_~j~0#1| (_ BitVec 32))) (let ((.cse3 (bvmul |ULTIMATE.start_bubbleSort_~j~0#1| (_ bv4 32)))) (let ((.cse0 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv20 32) .cse3)) (.cse2 (select |c_#length| |c_ULTIMATE.start_bubbleSort_~numbers#1.base|))) (or (let ((.cse1 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3 (_ bv24 32)))) (and (bvule .cse0 .cse1) (bvule .cse1 .cse2))) (not (bvule .cse0 .cse2)) (not (bvule (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3) (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3))))))) is different from false [2021-11-23 02:57:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 9 trivial. 62 not checked. [2021-11-23 02:57:29,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:29,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364333467] [2021-11-23 02:57:29,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364333467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:29,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1014434699] [2021-11-23 02:57:29,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:57:29,340 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:57:29,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:57:29,352 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:57:29,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2021-11-23 02:57:38,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 02:57:38,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:57:38,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 02:57:38,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:38,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:57:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 112 proven. 50 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:57:45,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:59:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:59:13,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1014434699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:59:13,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880943887] [2021-11-23 02:59:13,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:59:13,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:59:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:59:13,265 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:59:13,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707fd540-15a5-43e6-9add-435f52c43ec3/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-23 02:59:14,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 02:59:14,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:59:14,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 02:59:14,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:59:14,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 02:59:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 102 proven. 60 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:59:21,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:00:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:00:10,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880943887] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:00:10,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:00:10,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 20, 21, 21, 21] total 79 [2021-11-23 03:00:10,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520703454] [2021-11-23 03:00:10,076 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:00:10,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-23 03:00:10,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:00:10,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-23 03:00:10,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=5342, Unknown=16, NotChecked=152, Total=6162 [2021-11-23 03:00:10,080 INFO L87 Difference]: Start difference. First operand 580 states and 665 transitions. Second operand has 79 states, 79 states have (on average 3.1772151898734178) internal successors, (251), 79 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:00:23,513 WARN L227 SmtUtils]: Spent 10.75s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:00:25,574 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_bubbleSort_~j~0#1| (_ BitVec 32))) (let ((.cse3 (bvmul |ULTIMATE.start_bubbleSort_~j~0#1| (_ bv4 32)))) (let ((.cse0 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv20 32) .cse3)) (.cse2 (select |c_#length| |c_ULTIMATE.start_bubbleSort_~numbers#1.base|)) (.cse4 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3))) (or (let ((.cse1 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3 (_ bv24 32)))) (and (bvule .cse0 .cse1) (bvule .cse1 .cse2))) (not (bvule .cse0 .cse2)) (not (bvule .cse4 .cse2)) (not (bvule (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3) .cse4)))))) (let ((.cse8 (bvmul |c_ULTIMATE.start_bubbleSort_~j~0#1| (_ bv4 32)))) (let ((.cse7 (select |c_#length| |c_ULTIMATE.start_bubbleSort_~numbers#1.base|)) (.cse5 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv20 32) .cse8)) (.cse9 (bvadd (_ bv16 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse8)) (.cse10 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse8 (_ bv12 32)))) (or (let ((.cse6 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse8 (_ bv24 32)))) (and (bvule .cse5 .cse6) (bvule .cse6 .cse7))) (not (bvule .cse5 .cse7)) (not (bvule .cse9 .cse5)) (not (bvule .cse10 .cse9)) (not (bvule (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv8 32) .cse8) .cse10)))))) is different from false [2021-11-23 03:00:27,656 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_bubbleSort_~j~0#1| (_ BitVec 32))) (let ((.cse3 (bvmul |ULTIMATE.start_bubbleSort_~j~0#1| (_ bv4 32)))) (let ((.cse0 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv20 32) .cse3)) (.cse2 (select |c_#length| |c_ULTIMATE.start_bubbleSort_~numbers#1.base|)) (.cse4 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3))) (or (let ((.cse1 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3 (_ bv24 32)))) (and (bvule .cse0 .cse1) (bvule .cse1 .cse2))) (not (bvule .cse0 .cse2)) (not (bvule .cse4 .cse2)) (not (bvule (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3) .cse4)))))) (let ((.cse8 (bvmul |c_ULTIMATE.start_bubbleSort_~j~0#1| (_ bv4 32)))) (let ((.cse5 (bvadd (_ bv16 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse8)) (.cse7 (select |c_#length| |c_ULTIMATE.start_bubbleSort_~numbers#1.base|)) (.cse9 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv8 32) .cse8)) (.cse10 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse8 (_ bv12 32)))) (or (let ((.cse6 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv20 32) .cse8))) (and (bvule .cse5 .cse6) (bvule .cse6 .cse7))) (not (bvule (bvadd (_ bv4 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse8) .cse9)) (not (bvule .cse10 .cse5)) (not (bvule .cse5 .cse7)) (not (bvule .cse9 .cse10)))))) is different from false [2021-11-23 03:02:15,032 WARN L227 SmtUtils]: Spent 1.06m on a formula simplification. DAG size of input: 46 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:02:18,049 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul |c_ULTIMATE.start_bubbleSort_~j~0#1| (_ bv4 32)))) (let ((.cse7 (select |c_#length| |c_ULTIMATE.start_bubbleSort_~numbers#1.base|)) (.cse6 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse0 (_ bv12 32))) (.cse13 (bvadd (_ bv16 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse0)) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse0)) (.cse15 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv8 32) .cse0))) (let ((.cse2 (not (bvule .cse1 .cse15))) (.cse4 (bvule .cse6 .cse13)) (.cse3 (bvule .cse13 .cse7)) (.cse5 (not (bvule .cse15 .cse6)))) (and (or (not (bvule (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse0) .cse1)) .cse2 (and .cse3 .cse4) .cse5 (not (bvule .cse6 .cse7))) (forall ((|ULTIMATE.start_bubbleSort_~j~0#1| (_ BitVec 32))) (let ((.cse11 (bvmul |ULTIMATE.start_bubbleSort_~j~0#1| (_ bv4 32)))) (let ((.cse8 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv20 32) .cse11)) (.cse10 (select |c_#length| |c_ULTIMATE.start_bubbleSort_~numbers#1.base|)) (.cse12 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse11))) (or (let ((.cse9 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse11 (_ bv24 32)))) (and (bvule .cse8 .cse9) (bvule .cse9 .cse10))) (not (bvule .cse8 .cse10)) (not (bvule .cse12 .cse10)) (not (bvule (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse11) .cse12)))))) (or (let ((.cse14 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv20 32) .cse0))) (and (bvule .cse13 .cse14) (bvule .cse14 .cse7))) .cse2 (not .cse4) (not .cse3) .cse5))))) is different from false [2021-11-23 03:02:21,537 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse16 (bvmul |c_ULTIMATE.start_bubbleSort_~j~0#1| (_ bv4 32)))) (let ((.cse9 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse16 (_ bv12 32))) (.cse18 (bvadd (_ bv16 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse16))) (let ((.cse7 (bvule .cse9 .cse18)) (.cse14 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv20 32) .cse16)) (.cse10 (select |c_#length| |c_ULTIMATE.start_bubbleSort_~numbers#1.base|)) (.cse17 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv8 32) .cse16))) (let ((.cse5 (not (bvule (bvadd (_ bv4 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse16) .cse17))) (.cse6 (bvule .cse18 .cse10)) (.cse12 (bvule .cse14 .cse10)) (.cse11 (bvule .cse18 .cse14)) (.cse13 (not .cse7)) (.cse8 (not (bvule .cse17 .cse9)))) (and (forall ((|ULTIMATE.start_bubbleSort_~j~0#1| (_ BitVec 32))) (let ((.cse3 (bvmul |ULTIMATE.start_bubbleSort_~j~0#1| (_ bv4 32)))) (let ((.cse0 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| (_ bv20 32) .cse3)) (.cse2 (select |c_#length| |c_ULTIMATE.start_bubbleSort_~numbers#1.base|)) (.cse4 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3))) (or (let ((.cse1 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3 (_ bv24 32)))) (and (bvule .cse0 .cse1) (bvule .cse1 .cse2))) (not (bvule .cse0 .cse2)) (not (bvule .cse4 .cse2)) (not (bvule (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse3) .cse4)))))) (or .cse5 (and .cse6 .cse7) .cse8 (not (bvule .cse9 .cse10))) (or (and .cse11 .cse12) .cse5 .cse13 (not .cse6) .cse8) (or (let ((.cse15 (bvadd |c_ULTIMATE.start_bubbleSort_~numbers#1.offset| .cse16 (_ bv24 32)))) (and (bvule .cse14 .cse15) (bvule .cse15 .cse10))) (not .cse12) (not .cse11) .cse13 .cse8)))))) is different from false