./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:34:19,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:34:19,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:34:19,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:34:19,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:34:19,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:34:19,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:34:19,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:34:19,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:34:19,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:34:19,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:34:19,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:34:19,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:34:19,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:34:19,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:34:19,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:34:19,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:34:19,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:34:19,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:34:19,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:34:19,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:34:19,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:34:19,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:34:19,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:34:19,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:34:19,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:34:19,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:34:19,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:34:19,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:34:19,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:34:19,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:34:19,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:34:19,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:34:19,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:34:19,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:34:19,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:34:19,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:34:19,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:34:19,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:34:19,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:34:19,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:34:19,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:34:19,759 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:34:19,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:34:19,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:34:19,760 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:34:19,760 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:34:19,760 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:34:19,761 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:34:19,761 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:34:19,761 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:34:19,761 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:34:19,761 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:34:19,761 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:34:19,762 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:34:19,762 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:34:19,762 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:34:19,762 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:34:19,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:34:19,763 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:34:19,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:34:19,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:34:19,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:34:19,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:34:19,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:34:19,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:34:19,764 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:34:19,765 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:34:19,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:34:19,765 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:34:19,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:34:19,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:34:19,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:34:19,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:19,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:34:19,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:34:19,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:34:19,766 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:34:19,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:34:19,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:34:19,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:34:19,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:34:19,767 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_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c [2021-11-13 02:34:20,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:34:20,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:34:20,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:34:20,140 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:34:20,141 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:34:20,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2021-11-13 02:34:20,207 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/data/1ee65dd0c/09f8233591574c5cbd16575ba242b5ee/FLAGf0a8b24b1 [2021-11-13 02:34:20,927 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:34:20,928 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2021-11-13 02:34:20,946 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/data/1ee65dd0c/09f8233591574c5cbd16575ba242b5ee/FLAGf0a8b24b1 [2021-11-13 02:34:21,100 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/data/1ee65dd0c/09f8233591574c5cbd16575ba242b5ee [2021-11-13 02:34:21,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:34:21,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:34:21,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:21,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:34:21,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:34:21,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:21" (1/1) ... [2021-11-13 02:34:21,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ebc5059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:21, skipping insertion in model container [2021-11-13 02:34:21,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:21" (1/1) ... [2021-11-13 02:34:21,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:34:21,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:34:21,827 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2021-11-13 02:34:21,841 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2021-11-13 02:34:21,967 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2021-11-13 02:34:21,968 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2021-11-13 02:34:21,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:21,996 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) [2021-11-13 02:34:21,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7caa1764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:21, skipping insertion in model container [2021-11-13 02:34:21,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:21,997 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:34:21,999 INFO L158 Benchmark]: Toolchain (without parser) took 893.82ms. Allocated memory is still 92.3MB. Free memory was 67.5MB in the beginning and 54.2MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 02:34:22,000 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 92.3MB. Free memory was 66.8MB in the beginning and 66.7MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:34:22,001 INFO L158 Benchmark]: CACSL2BoogieTranslator took 891.26ms. Allocated memory is still 92.3MB. Free memory was 67.3MB in the beginning and 54.2MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 02:34:22,003 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 92.3MB. Free memory was 66.8MB in the beginning and 66.7MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 891.26ms. Allocated memory is still 92.3MB. Free memory was 67.3MB in the beginning and 54.2MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: 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_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:34:24,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:34:24,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:34:24,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:34:24,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:34:24,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:34:24,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:34:24,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:34:24,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:34:24,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:34:24,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:34:24,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:34:24,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:34:24,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:34:24,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:34:24,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:34:24,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:34:24,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:34:24,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:34:24,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:34:24,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:34:24,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:34:24,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:34:24,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:34:24,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:34:24,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:34:24,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:34:24,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:34:24,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:34:24,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:34:24,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:34:24,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:34:24,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:34:24,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:34:24,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:34:24,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:34:24,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:34:24,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:34:24,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:34:24,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:34:24,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:34:24,473 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:34:24,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:34:24,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:34:24,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:34:24,524 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:34:24,525 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:34:24,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:34:24,525 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:34:24,525 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:34:24,525 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:34:24,526 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:34:24,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:34:24,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:34:24,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:34:24,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:34:24,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:34:24,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:34:24,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:34:24,530 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:34:24,530 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:34:24,530 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:34:24,531 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:34:24,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:34:24,531 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:34:24,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:34:24,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:34:24,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:34:24,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:34:24,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:24,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:34:24,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:34:24,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:34:24,533 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:34:24,533 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:24,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:34:24,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:34:24,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:34:24,535 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_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c [2021-11-13 02:34:24,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:34:24,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:34:24,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:34:24,917 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:34:24,919 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:34:24,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2021-11-13 02:34:25,005 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/data/3e4f6cc87/c2c87e4eed924c338aebb590fb3fcca8/FLAGe659c3a99 [2021-11-13 02:34:25,736 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:34:25,736 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2021-11-13 02:34:25,764 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/data/3e4f6cc87/c2c87e4eed924c338aebb590fb3fcca8/FLAGe659c3a99 [2021-11-13 02:34:26,001 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/data/3e4f6cc87/c2c87e4eed924c338aebb590fb3fcca8 [2021-11-13 02:34:26,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:34:26,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:34:26,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:26,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:34:26,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:34:26,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:26" (1/1) ... [2021-11-13 02:34:26,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2663d140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:26, skipping insertion in model container [2021-11-13 02:34:26,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:26" (1/1) ... [2021-11-13 02:34:26,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:34:26,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:34:26,774 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2021-11-13 02:34:26,792 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2021-11-13 02:34:26,974 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2021-11-13 02:34:26,975 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2021-11-13 02:34:26,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:27,010 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:34:27,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:34:27,087 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2021-11-13 02:34:27,090 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2021-11-13 02:34:27,155 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2021-11-13 02:34:27,156 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2021-11-13 02:34:27,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:27,174 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:34:27,209 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2021-11-13 02:34:27,217 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2021-11-13 02:34:27,279 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2021-11-13 02:34:27,280 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2021-11-13 02:34:27,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:27,400 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:34:27,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27 WrapperNode [2021-11-13 02:34:27,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:27,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:27,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:34:27,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:34:27,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:27,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:34:27,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:34:27,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:34:27,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:34:27,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:34:27,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:34:27,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:34:27,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:27,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:27,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:34:27,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:34:27,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:34:27,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 02:34:27,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:34:27,856 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-13 02:34:27,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:34:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:34:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 02:34:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:34:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-13 02:34:27,857 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-13 02:34:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:34:27,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:34:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:34:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-13 02:34:27,858 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-13 02:34:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:34:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-13 02:34:27,859 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-13 02:34:27,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:34:27,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:34:33,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:34:33,959 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-13 02:34:33,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:33 BoogieIcfgContainer [2021-11-13 02:34:33,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:34:33,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:34:33,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:34:33,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:34:33,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:34:26" (1/3) ... [2021-11-13 02:34:33,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d32c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:33, skipping insertion in model container [2021-11-13 02:34:33,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (2/3) ... [2021-11-13 02:34:33,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d32c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:33, skipping insertion in model container [2021-11-13 02:34:33,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:33" (3/3) ... [2021-11-13 02:34:33,975 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test6-2.i [2021-11-13 02:34:33,981 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:34:33,982 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-13 02:34:34,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:34:34,061 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:34:34,062 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-13 02:34:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 234 states have (on average 1.6367521367521367) internal successors, (383), 238 states have internal predecessors, (383), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-13 02:34:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 02:34:34,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:34,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:34,106 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:34:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:34,117 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-13 02:34:34,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:34,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522685835] [2021-11-13 02:34:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:34,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:34,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:34,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:34,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:34:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:34,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:34:34,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:34,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:34,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:34,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522685835] [2021-11-13 02:34:34,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522685835] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:34,500 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:34,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 02:34:34,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990130949] [2021-11-13 02:34:34,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:34,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:34:34,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:34,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:34:34,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:34:34,553 INFO L87 Difference]: Start difference. First operand has 258 states, 234 states have (on average 1.6367521367521367) internal successors, (383), 238 states have internal predecessors, (383), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:34,645 INFO L93 Difference]: Finished difference Result 511 states and 836 transitions. [2021-11-13 02:34:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:34:34,648 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-13 02:34:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:34,669 INFO L225 Difference]: With dead ends: 511 [2021-11-13 02:34:34,670 INFO L226 Difference]: Without dead ends: 251 [2021-11-13 02:34:34,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:34:34,679 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:34,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 6.75ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:34:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-13 02:34:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-11-13 02:34:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 228 states have (on average 1.3026315789473684) internal successors, (297), 232 states have internal predecessors, (297), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-13 02:34:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 327 transitions. [2021-11-13 02:34:34,740 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 327 transitions. Word has length 8 [2021-11-13 02:34:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:34,741 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 327 transitions. [2021-11-13 02:34:34,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 327 transitions. [2021-11-13 02:34:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 02:34:34,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:34,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:34,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:34,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:34,956 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:34:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:34,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-13 02:34:34,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:34,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654922989] [2021-11-13 02:34:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:34,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:34,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:34,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:34,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:34:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:34:35,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:35,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:35,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:35,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654922989] [2021-11-13 02:34:35,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654922989] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:35,353 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:35,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 02:34:35,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591821265] [2021-11-13 02:34:35,353 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:35,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:35,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:35,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:35,356 INFO L87 Difference]: Start difference. First operand 251 states and 327 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-11-13 02:34:37,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:40,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:40,636 INFO L93 Difference]: Finished difference Result 651 states and 857 transitions. [2021-11-13 02:34:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:34:40,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 10 [2021-11-13 02:34:40,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:40,641 INFO L225 Difference]: With dead ends: 651 [2021-11-13 02:34:40,641 INFO L226 Difference]: Without dead ends: 398 [2021-11-13 02:34:40,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:34:40,646 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 186 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5027.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.94ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5194.58ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:40,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 924 Invalid, 141 Unknown, 0 Unchecked, 9.94ms Time], IncrementalHoareTripleChecker [19 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 5194.58ms Time] [2021-11-13 02:34:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-13 02:34:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 361. [2021-11-13 02:34:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 335 states have (on average 1.31044776119403) internal successors, (439), 340 states have internal predecessors, (439), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 02:34:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 474 transitions. [2021-11-13 02:34:40,684 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 474 transitions. Word has length 10 [2021-11-13 02:34:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:40,684 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 474 transitions. [2021-11-13 02:34:40,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-11-13 02:34:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 474 transitions. [2021-11-13 02:34:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 02:34:40,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:40,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:40,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:40,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:40,899 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:34:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1195077116, now seen corresponding path program 1 times [2021-11-13 02:34:40,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:40,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386445597] [2021-11-13 02:34:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:40,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:40,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:40,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:40,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:34:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:41,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:34:41,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:41,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:34:41,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:34:41,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:34:41,248 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-13 02:34:41,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-13 02:34:41,335 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-13 02:34:41,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-13 02:34:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:41,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:41,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:41,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386445597] [2021-11-13 02:34:41,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386445597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:41,510 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:41,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:34:41,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377644068] [2021-11-13 02:34:41,513 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:41,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:34:41,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:34:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:34:41,516 INFO L87 Difference]: Start difference. First operand 361 states and 474 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:45,875 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:48,982 INFO L93 Difference]: Finished difference Result 762 states and 1008 transitions. [2021-11-13 02:34:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:34:48,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 02:34:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:48,988 INFO L225 Difference]: With dead ends: 762 [2021-11-13 02:34:48,988 INFO L226 Difference]: Without dead ends: 552 [2021-11-13 02:34:48,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:48,991 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 435 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7056.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.66ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7362.53ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:48,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 965 Invalid, 241 Unknown, 0 Unchecked, 10.66ms Time], IncrementalHoareTripleChecker [14 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 7362.53ms Time] [2021-11-13 02:34:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-13 02:34:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 360. [2021-11-13 02:34:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 334 states have (on average 1.3083832335329342) internal successors, (437), 339 states have internal predecessors, (437), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 02:34:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 472 transitions. [2021-11-13 02:34:49,027 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 472 transitions. Word has length 13 [2021-11-13 02:34:49,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:49,027 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 472 transitions. [2021-11-13 02:34:49,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 472 transitions. [2021-11-13 02:34:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 02:34:49,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:49,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:49,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-13 02:34:49,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:49,250 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:34:49,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:49,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1739977374, now seen corresponding path program 1 times [2021-11-13 02:34:49,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:49,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704508080] [2021-11-13 02:34:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:49,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:49,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:49,254 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:49,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:34:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:49,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:34:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:49,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:49,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:49,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704508080] [2021-11-13 02:34:49,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704508080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:49,847 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:49,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:34:49,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470976442] [2021-11-13 02:34:49,848 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:49,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:34:49,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:49,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:34:49,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:34:49,850 INFO L87 Difference]: Start difference. First operand 360 states and 472 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:50,050 INFO L93 Difference]: Finished difference Result 718 states and 948 transitions. [2021-11-13 02:34:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:50,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-13 02:34:50,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:50,065 INFO L225 Difference]: With dead ends: 718 [2021-11-13 02:34:50,065 INFO L226 Difference]: Without dead ends: 368 [2021-11-13 02:34:50,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:34:50,075 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 261 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.53ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.13ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:50,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 691 Invalid, 69 Unknown, 0 Unchecked, 5.53ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 135.13ms Time] [2021-11-13 02:34:50,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-13 02:34:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 366. [2021-11-13 02:34:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 340 states have (on average 1.2558823529411764) internal successors, (427), 345 states have internal predecessors, (427), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 02:34:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 462 transitions. [2021-11-13 02:34:50,100 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 462 transitions. Word has length 47 [2021-11-13 02:34:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:50,101 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 462 transitions. [2021-11-13 02:34:50,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 462 transitions. [2021-11-13 02:34:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 02:34:50,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:50,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:50,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:50,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:50,320 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:34:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1265789014, now seen corresponding path program 1 times [2021-11-13 02:34:50,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:50,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640525760] [2021-11-13 02:34:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:50,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:50,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:50,322 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:50,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:34:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:50,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:34:50,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:50,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:50,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:50,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640525760] [2021-11-13 02:34:50,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640525760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:50,881 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:50,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 02:34:50,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683245764] [2021-11-13 02:34:50,882 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:50,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:34:50,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:50,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:34:50,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:34:50,883 INFO L87 Difference]: Start difference. First operand 366 states and 462 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:51,074 INFO L93 Difference]: Finished difference Result 378 states and 474 transitions. [2021-11-13 02:34:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:34:51,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-13 02:34:51,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:51,081 INFO L225 Difference]: With dead ends: 378 [2021-11-13 02:34:51,082 INFO L226 Difference]: Without dead ends: 376 [2021-11-13 02:34:51,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:34:51,087 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 17 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.57ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.39ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:51,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1858 Invalid, 42 Unknown, 0 Unchecked, 9.57ms Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 120.39ms Time] [2021-11-13 02:34:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-13 02:34:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2021-11-13 02:34:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 347 states have (on average 1.2536023054755043) internal successors, (435), 353 states have internal predecessors, (435), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-13 02:34:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 472 transitions. [2021-11-13 02:34:51,126 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 472 transitions. Word has length 47 [2021-11-13 02:34:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:51,127 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 472 transitions. [2021-11-13 02:34:51,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 472 transitions. [2021-11-13 02:34:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 02:34:51,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:51,141 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:51,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:51,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:51,355 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:34:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1360052348, now seen corresponding path program 1 times [2021-11-13 02:34:51,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:51,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786106367] [2021-11-13 02:34:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:51,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:51,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:51,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:51,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:34:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:51,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:34:51,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:52,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:52,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:52,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786106367] [2021-11-13 02:34:52,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786106367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:52,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:52,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-13 02:34:52,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598700683] [2021-11-13 02:34:52,400 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:52,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:34:52,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:52,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:34:52,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:34:52,402 INFO L87 Difference]: Start difference. First operand 376 states and 472 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 02:34:52,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:52,802 INFO L93 Difference]: Finished difference Result 719 states and 913 transitions. [2021-11-13 02:34:52,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:34:52,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2021-11-13 02:34:52,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:52,809 INFO L225 Difference]: With dead ends: 719 [2021-11-13 02:34:52,809 INFO L226 Difference]: Without dead ends: 389 [2021-11-13 02:34:52,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:34:52,814 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 71 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 299.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.27ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 345.59ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:52,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1712 Invalid, 164 Unknown, 0 Unchecked, 9.27ms Time], IncrementalHoareTripleChecker [21 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 345.59ms Time] [2021-11-13 02:34:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-13 02:34:52,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 380. [2021-11-13 02:34:52,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 349 states have (on average 1.2521489971346704) internal successors, (437), 356 states have internal predecessors, (437), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-11-13 02:34:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 477 transitions. [2021-11-13 02:34:52,851 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 477 transitions. Word has length 62 [2021-11-13 02:34:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:52,855 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 477 transitions. [2021-11-13 02:34:52,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 02:34:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 477 transitions. [2021-11-13 02:34:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 02:34:52,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:52,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:52,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:53,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:53,077 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:34:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:53,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1778039099, now seen corresponding path program 1 times [2021-11-13 02:34:53,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:53,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416035445] [2021-11-13 02:34:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:53,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:53,081 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:53,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:34:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:34:53,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:53,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:53,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:53,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416035445] [2021-11-13 02:34:53,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416035445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:53,863 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:53,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:34:53,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361005516] [2021-11-13 02:34:53,863 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:53,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:34:53,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:34:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:34:53,865 INFO L87 Difference]: Start difference. First operand 380 states and 477 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 02:34:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:54,004 INFO L93 Difference]: Finished difference Result 724 states and 919 transitions. [2021-11-13 02:34:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:34:54,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2021-11-13 02:34:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:54,011 INFO L225 Difference]: With dead ends: 724 [2021-11-13 02:34:54,011 INFO L226 Difference]: Without dead ends: 391 [2021-11-13 02:34:54,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:34:54,014 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 12 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.22ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.69ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:54,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 625 Invalid, 32 Unknown, 0 Unchecked, 3.22ms Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 79.69ms Time] [2021-11-13 02:34:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-13 02:34:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2021-11-13 02:34:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 358 states have (on average 1.2569832402234637) internal successors, (450), 366 states have internal predecessors, (450), 20 states have call successors, (20), 7 states have call predecessors, (20), 9 states have return successors, (21), 18 states have call predecessors, (21), 19 states have call successors, (21) [2021-11-13 02:34:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 491 transitions. [2021-11-13 02:34:54,044 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 491 transitions. Word has length 67 [2021-11-13 02:34:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:54,048 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 491 transitions. [2021-11-13 02:34:54,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 02:34:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 491 transitions. [2021-11-13 02:34:54,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 02:34:54,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:54,053 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:54,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:54,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:54,271 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:34:54,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:54,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1248071707, now seen corresponding path program 1 times [2021-11-13 02:34:54,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:54,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002358295] [2021-11-13 02:34:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:54,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:54,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:54,274 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:54,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:34:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:54,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:34:54,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:54,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:55,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:55,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002358295] [2021-11-13 02:34:55,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002358295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:55,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1199526258] [2021-11-13 02:34:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:55,282 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:55,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:55,287 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:55,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-13 02:34:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:34:55,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:34:56,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:56,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1199526258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:56,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225696662] [2021-11-13 02:34:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:56,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:56,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:56,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:56,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 02:34:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:57,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:34:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:57,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:34:57,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225696662] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:57,486 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 02:34:57,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 8, 7] total 21 [2021-11-13 02:34:57,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845258910] [2021-11-13 02:34:57,487 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:57,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:34:57,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:57,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:34:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:34:57,489 INFO L87 Difference]: Start difference. First operand 391 states and 491 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:34:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:58,381 INFO L93 Difference]: Finished difference Result 2188 states and 2820 transitions. [2021-11-13 02:34:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:34:58,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 69 [2021-11-13 02:34:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:58,399 INFO L225 Difference]: With dead ends: 2188 [2021-11-13 02:34:58,399 INFO L226 Difference]: Without dead ends: 1844 [2021-11-13 02:34:58,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:34:58,403 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 1676 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 593.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.13ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 703.35ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:58,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 2151 Invalid, 250 Unknown, 0 Unchecked, 18.13ms Time], IncrementalHoareTripleChecker [80 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 703.35ms Time] [2021-11-13 02:34:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-13 02:34:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1397. [2021-11-13 02:34:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1296 states have (on average 1.2708333333333333) internal successors, (1647), 1313 states have internal predecessors, (1647), 68 states have call successors, (68), 25 states have call predecessors, (68), 29 states have return successors, (71), 58 states have call predecessors, (71), 64 states have call successors, (71) [2021-11-13 02:34:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1786 transitions. [2021-11-13 02:34:58,512 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1786 transitions. Word has length 69 [2021-11-13 02:34:58,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:58,516 INFO L470 AbstractCegarLoop]: Abstraction has 1397 states and 1786 transitions. [2021-11-13 02:34:58,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:34:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1786 transitions. [2021-11-13 02:34:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 02:34:58,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:58,519 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:58,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-13 02:34:58,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:58,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:59,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:59,123 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:34:59,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:59,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2003267831, now seen corresponding path program 1 times [2021-11-13 02:34:59,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:59,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51277406] [2021-11-13 02:34:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:59,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:59,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:59,125 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:59,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:34:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:59,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:34:59,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:34:59,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:35:00,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:00,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51277406] [2021-11-13 02:35:00,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51277406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:00,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1945419108] [2021-11-13 02:35:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:00,421 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:00,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:35:00,422 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:35:00,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-13 02:35:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:01,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:35:01,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:35:01,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:35:01,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1945419108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:01,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127349900] [2021-11-13 02:35:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:01,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:01,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:01,654 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:01,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 02:35:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:35:02,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:02,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:35:02,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:35:02,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:35:02,348 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-13 02:35:02,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-13 02:35:02,466 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-13 02:35:02,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-13 02:35:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:35:02,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:35:02,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127349900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:02,824 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 02:35:02,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-11-13 02:35:02,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100648280] [2021-11-13 02:35:02,825 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:02,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:35:02,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:02,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:35:02,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:35:02,827 INFO L87 Difference]: Start difference. First operand 1397 states and 1786 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 02:35:07,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:09,059 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:15,462 INFO L93 Difference]: Finished difference Result 2058 states and 2681 transitions. [2021-11-13 02:35:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:35:15,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 101 [2021-11-13 02:35:15,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:15,484 INFO L225 Difference]: With dead ends: 2058 [2021-11-13 02:35:15,485 INFO L226 Difference]: Without dead ends: 1858 [2021-11-13 02:35:15,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:35:15,490 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 209 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11968.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.58ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12396.80ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:15,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1352 Invalid, 295 Unknown, 0 Unchecked, 9.58ms Time], IncrementalHoareTripleChecker [5 Valid, 288 Invalid, 2 Unknown, 0 Unchecked, 12396.80ms Time] [2021-11-13 02:35:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-11-13 02:35:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1689. [2021-11-13 02:35:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1581 states have (on average 1.2852624920936115) internal successors, (2032), 1600 states have internal predecessors, (2032), 75 states have call successors, (75), 25 states have call predecessors, (75), 29 states have return successors, (78), 63 states have call predecessors, (78), 71 states have call successors, (78) [2021-11-13 02:35:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2185 transitions. [2021-11-13 02:35:15,626 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2185 transitions. Word has length 101 [2021-11-13 02:35:15,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:15,628 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 2185 transitions. [2021-11-13 02:35:15,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 02:35:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2185 transitions. [2021-11-13 02:35:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 02:35:15,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:15,638 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:15,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:15,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:16,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:16,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:16,252 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:35:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:16,252 INFO L85 PathProgramCache]: Analyzing trace with hash -568346325, now seen corresponding path program 1 times [2021-11-13 02:35:16,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:16,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610645045] [2021-11-13 02:35:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:16,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:16,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:16,254 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:16,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:35:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:16,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:35:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:35:17,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:35:17,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:17,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610645045] [2021-11-13 02:35:17,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610645045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:17,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1184829345] [2021-11-13 02:35:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:17,665 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:17,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:35:17,666 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:35:17,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 02:35:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:18,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:35:18,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:35:18,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:35:18,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1184829345] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:18,663 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:35:18,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-13 02:35:18,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113195655] [2021-11-13 02:35:18,664 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:18,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:35:18,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:18,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:35:18,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:35:18,666 INFO L87 Difference]: Start difference. First operand 1689 states and 2185 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 02:35:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:18,826 INFO L93 Difference]: Finished difference Result 3336 states and 4328 transitions. [2021-11-13 02:35:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:35:18,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 113 [2021-11-13 02:35:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:18,842 INFO L225 Difference]: With dead ends: 3336 [2021-11-13 02:35:18,842 INFO L226 Difference]: Without dead ends: 1694 [2021-11-13 02:35:18,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:35:18,847 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 0 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:18,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 625 Invalid, 6 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 56.54ms Time] [2021-11-13 02:35:18,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-11-13 02:35:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1694. [2021-11-13 02:35:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1586 states have (on average 1.2843631778058007) internal successors, (2037), 1605 states have internal predecessors, (2037), 75 states have call successors, (75), 25 states have call predecessors, (75), 29 states have return successors, (78), 63 states have call predecessors, (78), 71 states have call successors, (78) [2021-11-13 02:35:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2190 transitions. [2021-11-13 02:35:18,975 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2190 transitions. Word has length 113 [2021-11-13 02:35:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:18,976 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 2190 transitions. [2021-11-13 02:35:18,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 02:35:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2190 transitions. [2021-11-13 02:35:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 02:35:18,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:18,980 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:18,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:19,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:19,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:19,385 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:35:19,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:19,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1803392937, now seen corresponding path program 1 times [2021-11-13 02:35:19,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:19,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075051372] [2021-11-13 02:35:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:19,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:19,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:19,390 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:19,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:35:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:20,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:35:20,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:35:20,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:35:21,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:21,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075051372] [2021-11-13 02:35:21,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075051372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:21,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1137305210] [2021-11-13 02:35:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:21,006 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:21,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:35:21,007 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:35:21,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-13 02:35:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:21,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:35:21,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:35:22,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:35:22,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1137305210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:22,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733365421] [2021-11-13 02:35:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:22,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:22,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:22,575 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:22,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 02:35:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:22,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:35:22,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:35:23,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 02:35:23,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733365421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:23,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:35:23,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 14 [2021-11-13 02:35:23,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606109302] [2021-11-13 02:35:23,776 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:35:23,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:35:23,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:23,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:35:23,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:35:23,778 INFO L87 Difference]: Start difference. First operand 1694 states and 2190 transitions. Second operand has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:35:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:24,868 INFO L93 Difference]: Finished difference Result 3433 states and 4464 transitions. [2021-11-13 02:35:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 02:35:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 113 [2021-11-13 02:35:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:24,883 INFO L225 Difference]: With dead ends: 3433 [2021-11-13 02:35:24,884 INFO L226 Difference]: Without dead ends: 1762 [2021-11-13 02:35:24,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2021-11-13 02:35:24,890 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 86 mSDsluCounter, 2167 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 338.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.40ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 392.82ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:24,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 2481 Invalid, 155 Unknown, 0 Unchecked, 6.40ms Time], IncrementalHoareTripleChecker [33 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 392.82ms Time] [2021-11-13 02:35:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-11-13 02:35:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1726. [2021-11-13 02:35:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1618 states have (on average 1.288627935723115) internal successors, (2085), 1637 states have internal predecessors, (2085), 75 states have call successors, (75), 25 states have call predecessors, (75), 29 states have return successors, (78), 63 states have call predecessors, (78), 71 states have call successors, (78) [2021-11-13 02:35:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2238 transitions. [2021-11-13 02:35:25,009 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2238 transitions. Word has length 113 [2021-11-13 02:35:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:25,010 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 2238 transitions. [2021-11-13 02:35:25,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:35:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2238 transitions. [2021-11-13 02:35:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 02:35:25,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:25,013 INFO L514 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:25,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:25,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:25,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:25,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:25,628 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:35:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1978009513, now seen corresponding path program 2 times [2021-11-13 02:35:25,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:25,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100440626] [2021-11-13 02:35:25,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:35:25,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:25,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:25,631 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:25,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 02:35:26,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:35:26,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:26,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:35:26,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:35:27,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:35:28,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:28,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100440626] [2021-11-13 02:35:28,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100440626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:28,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [525636840] [2021-11-13 02:35:28,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:35:28,167 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:28,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:35:28,168 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:35:28,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-13 02:35:55,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:35:55,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:55,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:35:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:35:55,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:35:55,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [525636840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:55,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721142510] [2021-11-13 02:35:55,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:35:55,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:55,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:55,688 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:55,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 02:42:50,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:42:50,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:42:50,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:42:50,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 76 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 02:42:50,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 02:42:51,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721142510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:42:51,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:42:51,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 27 [2021-11-13 02:42:51,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613865536] [2021-11-13 02:42:51,214 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:42:51,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 02:42:51,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:51,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 02:42:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-11-13 02:42:51,216 INFO L87 Difference]: Start difference. First operand 1726 states and 2238 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:42:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:55,331 INFO L93 Difference]: Finished difference Result 3577 states and 4672 transitions. [2021-11-13 02:42:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-13 02:42:55,332 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 121 [2021-11-13 02:42:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:55,344 INFO L225 Difference]: With dead ends: 3577 [2021-11-13 02:42:55,344 INFO L226 Difference]: Without dead ends: 1862 [2021-11-13 02:42:55,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 695 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1077, Invalid=2829, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 02:42:55,350 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 304 mSDsluCounter, 4697 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 876.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 5019 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.38ms SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1000.86ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:55,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 5019 Invalid, 528 Unknown, 0 Unchecked, 8.38ms Time], IncrementalHoareTripleChecker [122 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 1000.86ms Time] [2021-11-13 02:42:55,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-11-13 02:42:55,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1790. [2021-11-13 02:42:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1682 states have (on average 1.2942925089179549) internal successors, (2177), 1701 states have internal predecessors, (2177), 75 states have call successors, (75), 25 states have call predecessors, (75), 29 states have return successors, (78), 63 states have call predecessors, (78), 71 states have call successors, (78) [2021-11-13 02:42:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2330 transitions. [2021-11-13 02:42:55,464 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2330 transitions. Word has length 121 [2021-11-13 02:42:55,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:55,465 INFO L470 AbstractCegarLoop]: Abstraction has 1790 states and 2330 transitions. [2021-11-13 02:42:55,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:42:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2330 transitions. [2021-11-13 02:42:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 02:42:55,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:55,467 INFO L514 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:55,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:55,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:55,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-13 02:42:56,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:42:56,084 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 02:42:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash -64378967, now seen corresponding path program 3 times [2021-11-13 02:42:56,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:56,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002389882] [2021-11-13 02:42:56,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:42:56,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:56,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:56,086 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:56,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 02:43:07,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 02:43:07,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:43:07,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 02:43:07,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:43:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-13 02:43:08,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:43:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 213 proven. 108 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-13 02:43:09,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:43:09,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002389882] [2021-11-13 02:43:09,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002389882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:43:09,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1015400108] [2021-11-13 02:43:09,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:43:09,928 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:43:09,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:43:09,929 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:43:09,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20d524c-ece2-4b62-b2fc-dcb11dd53348/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process