./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b41ff920513b74db566933dfdd7430dbdb0b5764645b98d18d29abf93fb4135 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:30:55,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:30:55,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:30:55,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:30:55,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:30:55,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:30:55,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:30:55,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:30:55,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:30:55,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:30:55,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:30:55,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:30:55,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:30:55,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:30:55,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:30:55,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:30:55,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:30:55,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:30:55,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:30:55,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:30:55,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:30:55,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:30:55,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:30:55,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:30:55,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:30:55,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:30:55,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:30:55,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:30:55,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:30:55,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:30:55,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:30:55,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:30:55,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:30:55,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:30:55,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:30:55,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:30:55,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:30:55,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:30:55,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:30:55,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:30:55,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:30:55,815 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:30:55,855 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:30:55,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:30:55,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:30:55,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:30:55,857 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:30:55,857 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:30:55,857 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:30:55,858 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:30:55,864 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:30:55,864 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:30:55,866 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:30:55,866 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:30:55,866 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:30:55,866 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:30:55,867 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:30:55,867 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:30:55,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:30:55,868 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:30:55,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:30:55,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:30:55,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:30:55,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:30:55,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:30:55,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:30:55,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:30:55,869 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:30:55,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:30:55,870 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:30:55,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:30:55,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:30:55,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:30:55,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:30:55,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:30:55,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:30:55,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:30:55,873 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:30:55,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:30:55,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:30:55,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:30:55,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:30:55,874 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_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b41ff920513b74db566933dfdd7430dbdb0b5764645b98d18d29abf93fb4135 [2021-11-19 14:30:56,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:30:56,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:30:56,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:30:56,166 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:30:56,167 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:30:56,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i [2021-11-19 14:30:56,246 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/data/70840720e/04e2095fbfdc464083ed7f0eeae72295/FLAGc6d954550 [2021-11-19 14:30:56,843 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:30:56,843 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i [2021-11-19 14:30:56,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/data/70840720e/04e2095fbfdc464083ed7f0eeae72295/FLAGc6d954550 [2021-11-19 14:30:57,076 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/data/70840720e/04e2095fbfdc464083ed7f0eeae72295 [2021-11-19 14:30:57,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:30:57,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:30:57,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:57,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:30:57,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:30:57,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:57" (1/1) ... [2021-11-19 14:30:57,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20230099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:57, skipping insertion in model container [2021-11-19 14:30:57,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:57" (1/1) ... [2021-11-19 14:30:57,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:30:57,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:30:57,689 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[37019,37032] [2021-11-19 14:30:57,869 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[47352,47365] [2021-11-19 14:30:57,896 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:30:57,914 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:30:57,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6677c5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:57, skipping insertion in model container [2021-11-19 14:30:57,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:57,922 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:30:57,924 INFO L158 Benchmark]: Toolchain (without parser) took 841.83ms. Allocated memory is still 119.5MB. Free memory was 81.3MB in the beginning and 83.4MB in the end (delta: -2.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:30:57,925 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 119.5MB. Free memory was 93.4MB in the beginning and 93.3MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:30:57,926 INFO L158 Benchmark]: CACSL2BoogieTranslator took 834.95ms. Allocated memory is still 119.5MB. Free memory was 81.0MB in the beginning and 83.4MB in the end (delta: -2.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:30:57,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 119.5MB. Free memory was 93.4MB in the beginning and 93.3MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 834.95ms. Allocated memory is still 119.5MB. Free memory was 81.0MB in the beginning and 83.4MB in the end (delta: -2.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 815]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b41ff920513b74db566933dfdd7430dbdb0b5764645b98d18d29abf93fb4135 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:31:00,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:31:00,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:31:00,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:31:00,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:31:00,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:31:00,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:31:00,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:31:00,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:31:00,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:31:00,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:31:00,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:31:00,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:31:00,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:31:00,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:31:00,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:31:00,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:31:00,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:31:00,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:31:00,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:31:00,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:31:00,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:31:00,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:31:00,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:31:00,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:31:00,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:31:00,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:31:00,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:31:00,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:31:00,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:31:00,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:31:00,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:31:00,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:31:00,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:31:00,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:31:00,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:31:00,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:31:00,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:31:00,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:31:00,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:31:00,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:31:00,256 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:31:00,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:31:00,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:31:00,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:31:00,305 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:31:00,305 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:31:00,305 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:31:00,305 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:31:00,306 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:31:00,306 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:31:00,306 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:31:00,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:31:00,309 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:31:00,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:31:00,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:31:00,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:31:00,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:31:00,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:31:00,310 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:31:00,310 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:31:00,311 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:31:00,311 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:31:00,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:31:00,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:31:00,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:31:00,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:31:00,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:31:00,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:31:00,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:31:00,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:31:00,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:31:00,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:31:00,313 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:31:00,314 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:00,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:31:00,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:31:00,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:31:00,315 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_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b41ff920513b74db566933dfdd7430dbdb0b5764645b98d18d29abf93fb4135 [2021-11-19 14:31:00,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:31:00,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:31:00,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:31:00,774 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:31:00,776 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:31:00,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i [2021-11-19 14:31:00,853 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/data/e43b5befa/e5f109bc568546f68f514deb31ea764f/FLAG5b55493b0 [2021-11-19 14:31:01,544 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:31:01,549 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i [2021-11-19 14:31:01,577 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/data/e43b5befa/e5f109bc568546f68f514deb31ea764f/FLAG5b55493b0 [2021-11-19 14:31:01,726 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/data/e43b5befa/e5f109bc568546f68f514deb31ea764f [2021-11-19 14:31:01,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:31:01,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:31:01,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:31:01,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:31:01,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:31:01,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:31:01" (1/1) ... [2021-11-19 14:31:01,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfd0229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:01, skipping insertion in model container [2021-11-19 14:31:01,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:31:01" (1/1) ... [2021-11-19 14:31:01,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:31:01,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:31:02,429 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[37019,37032] [2021-11-19 14:31:02,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[47352,47365] [2021-11-19 14:31:02,602 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:31:02,627 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:31:02,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:31:02,673 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[37019,37032] [2021-11-19 14:31:02,762 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[47352,47365] [2021-11-19 14:31:02,772 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:31:02,787 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:31:02,838 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[37019,37032] [2021-11-19 14:31:02,896 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test2-2.i[47352,47365] [2021-11-19 14:31:02,905 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:31:02,970 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:31:02,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02 WrapperNode [2021-11-19 14:31:02,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:31:02,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:31:02,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:31:02,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:31:02,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02" (1/1) ... [2021-11-19 14:31:03,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02" (1/1) ... [2021-11-19 14:31:03,126 INFO L137 Inliner]: procedures = 211, calls = 286, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1039 [2021-11-19 14:31:03,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:31:03,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:31:03,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:31:03,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:31:03,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02" (1/1) ... [2021-11-19 14:31:03,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02" (1/1) ... [2021-11-19 14:31:03,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02" (1/1) ... [2021-11-19 14:31:03,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02" (1/1) ... [2021-11-19 14:31:03,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02" (1/1) ... [2021-11-19 14:31:03,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02" (1/1) ... [2021-11-19 14:31:03,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02" (1/1) ... [2021-11-19 14:31:03,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:31:03,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:31:03,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:31:03,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:31:03,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02" (1/1) ... [2021-11-19 14:31:03,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:31:03,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:31:03,319 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:31:03,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:31:03,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:31:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:31:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:31:03,376 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:31:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:31:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 14:31:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:31:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:31:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:31:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:31:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:31:03,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:31:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:31:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:31:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:31:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:31:03,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:31:03,644 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:31:03,645 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:31:10,510 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:31:10,520 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:31:10,520 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-19 14:31:10,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:31:10 BoogieIcfgContainer [2021-11-19 14:31:10,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:31:10,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:31:10,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:31:10,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:31:10,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:31:01" (1/3) ... [2021-11-19 14:31:10,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c68d017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:31:10, skipping insertion in model container [2021-11-19 14:31:10,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:02" (2/3) ... [2021-11-19 14:31:10,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c68d017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:31:10, skipping insertion in model container [2021-11-19 14:31:10,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:31:10" (3/3) ... [2021-11-19 14:31:10,532 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test2-2.i [2021-11-19 14:31:10,538 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:31:10,538 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:31:10,590 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:31:10,597 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:31:10,597 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:31:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 206 states, 193 states have (on average 1.689119170984456) internal successors, (326), 200 states have internal predecessors, (326), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:31:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 14:31:10,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:10,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:10,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:10,631 INFO L85 PathProgramCache]: Analyzing trace with hash -858859523, now seen corresponding path program 1 times [2021-11-19 14:31:10,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:10,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570158928] [2021-11-19 14:31:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:10,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:10,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:10,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:10,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:31:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:31:10,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:10,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:10,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:10,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570158928] [2021-11-19 14:31:10,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570158928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:10,913 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:10,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:31:10,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460842037] [2021-11-19 14:31:10,917 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:10,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:31:10,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:10,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:31:10,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:31:10,964 INFO L87 Difference]: Start difference. First operand has 206 states, 193 states have (on average 1.689119170984456) internal successors, (326), 200 states have internal predecessors, (326), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:11,013 INFO L93 Difference]: Finished difference Result 410 states and 687 transitions. [2021-11-19 14:31:11,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:31:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-19 14:31:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:11,027 INFO L225 Difference]: With dead ends: 410 [2021-11-19 14:31:11,027 INFO L226 Difference]: Without dead ends: 173 [2021-11-19 14:31:11,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:31:11,036 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:11,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:31:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-19 14:31:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-11-19 14:31:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.3229813664596273) internal successors, (213), 167 states have internal predecessors, (213), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:31:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2021-11-19 14:31:11,104 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 9 [2021-11-19 14:31:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:11,105 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2021-11-19 14:31:11,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2021-11-19 14:31:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 14:31:11,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:11,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:11,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:11,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:11,321 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash -294026559, now seen corresponding path program 1 times [2021-11-19 14:31:11,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:11,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346918343] [2021-11-19 14:31:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:11,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:11,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:11,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:11,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:31:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:11,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:11,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:11,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:12,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:12,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346918343] [2021-11-19 14:31:12,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346918343] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:12,011 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:12,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 14:31:12,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789809872] [2021-11-19 14:31:12,012 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:12,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:31:12,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:31:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:31:12,018 INFO L87 Difference]: Start difference. First operand 173 states and 229 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:12,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:12,245 INFO L93 Difference]: Finished difference Result 260 states and 347 transitions. [2021-11-19 14:31:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:31:12,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-19 14:31:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:12,251 INFO L225 Difference]: With dead ends: 260 [2021-11-19 14:31:12,251 INFO L226 Difference]: Without dead ends: 182 [2021-11-19 14:31:12,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:31:12,254 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 95 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:12,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 669 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:31:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-19 14:31:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2021-11-19 14:31:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 164 states have (on average 1.2682926829268293) internal successors, (208), 170 states have internal predecessors, (208), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:31:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 224 transitions. [2021-11-19 14:31:12,291 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 224 transitions. Word has length 44 [2021-11-19 14:31:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:12,292 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 224 transitions. [2021-11-19 14:31:12,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 224 transitions. [2021-11-19 14:31:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 14:31:12,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:12,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:12,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:12,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:12,517 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:12,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1193469581, now seen corresponding path program 1 times [2021-11-19 14:31:12,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:12,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364728642] [2021-11-19 14:31:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:12,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:12,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:12,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:12,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:31:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:12,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:31:12,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:12,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:13,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:13,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364728642] [2021-11-19 14:31:13,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364728642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:13,304 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:13,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-19 14:31:13,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41863503] [2021-11-19 14:31:13,304 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:13,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:31:13,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:13,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:31:13,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:31:13,306 INFO L87 Difference]: Start difference. First operand 176 states and 224 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:13,432 INFO L93 Difference]: Finished difference Result 256 states and 324 transitions. [2021-11-19 14:31:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:31:13,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-19 14:31:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:13,435 INFO L225 Difference]: With dead ends: 256 [2021-11-19 14:31:13,436 INFO L226 Difference]: Without dead ends: 175 [2021-11-19 14:31:13,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:31:13,439 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 119 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:13,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 526 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:31:13,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-19 14:31:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2021-11-19 14:31:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.2531645569620253) internal successors, (198), 164 states have internal predecessors, (198), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:31:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2021-11-19 14:31:13,454 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 44 [2021-11-19 14:31:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:13,455 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2021-11-19 14:31:13,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2021-11-19 14:31:13,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 14:31:13,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:13,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:13,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:13,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:13,675 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash -440517769, now seen corresponding path program 1 times [2021-11-19 14:31:13,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:13,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168796557] [2021-11-19 14:31:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:13,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:13,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:13,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:13,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:31:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:13,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:31:13,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:13,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:31:13,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:31:13,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:31:14,009 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 14:31:14,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 14:31:14,097 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 14:31:14,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-19 14:31:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:14,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:14,379 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:14,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168796557] [2021-11-19 14:31:14,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168796557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:14,380 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:14,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:31:14,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549233447] [2021-11-19 14:31:14,381 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:14,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:31:14,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:14,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:31:14,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:31:14,383 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:18,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:20,273 INFO L93 Difference]: Finished difference Result 423 states and 530 transitions. [2021-11-19 14:31:20,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:31:20,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-19 14:31:20,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:20,278 INFO L225 Difference]: With dead ends: 423 [2021-11-19 14:31:20,278 INFO L226 Difference]: Without dead ends: 347 [2021-11-19 14:31:20,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:31:20,280 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 321 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:20,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 793 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-11-19 14:31:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-19 14:31:20,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 172. [2021-11-19 14:31:20,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.25) internal successors, (200), 166 states have internal predecessors, (200), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:31:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 216 transitions. [2021-11-19 14:31:20,298 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 216 transitions. Word has length 44 [2021-11-19 14:31:20,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:20,299 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 216 transitions. [2021-11-19 14:31:20,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 216 transitions. [2021-11-19 14:31:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 14:31:20,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:20,302 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:20,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-19 14:31:20,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:20,516 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:20,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1362911587, now seen corresponding path program 1 times [2021-11-19 14:31:20,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:20,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379260186] [2021-11-19 14:31:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:20,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:20,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:20,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:20,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:31:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:20,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:31:20,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:21,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:21,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:21,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379260186] [2021-11-19 14:31:21,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379260186] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:21,390 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:21,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:31:21,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027671564] [2021-11-19 14:31:21,391 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:21,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:21,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:21,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:31:21,392 INFO L87 Difference]: Start difference. First operand 172 states and 216 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:21,561 INFO L93 Difference]: Finished difference Result 349 states and 440 transitions. [2021-11-19 14:31:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:31:21,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-19 14:31:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:21,564 INFO L225 Difference]: With dead ends: 349 [2021-11-19 14:31:21,565 INFO L226 Difference]: Without dead ends: 181 [2021-11-19 14:31:21,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:31:21,569 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 174 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:21,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 421 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:31:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-19 14:31:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2021-11-19 14:31:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.196319018404908) internal successors, (195), 169 states have internal predecessors, (195), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:31:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-11-19 14:31:21,592 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 96 [2021-11-19 14:31:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:21,594 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-11-19 14:31:21,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-11-19 14:31:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 14:31:21,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:21,603 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:21,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:21,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:21,825 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:21,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:21,825 INFO L85 PathProgramCache]: Analyzing trace with hash -725253137, now seen corresponding path program 1 times [2021-11-19 14:31:21,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:21,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876257085] [2021-11-19 14:31:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:21,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:21,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:21,829 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:21,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:31:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:22,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:31:22,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:22,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:22,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:22,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876257085] [2021-11-19 14:31:22,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876257085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:22,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1762443469] [2021-11-19 14:31:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:22,906 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:22,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:22,915 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:22,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 14:31:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:23,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:31:23,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:23,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:24,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1762443469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:24,333 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:31:24,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4, 4] total 5 [2021-11-19 14:31:24,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967110986] [2021-11-19 14:31:24,333 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:24,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:31:24,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:31:24,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:31:24,335 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:25,005 INFO L93 Difference]: Finished difference Result 480 states and 581 transitions. [2021-11-19 14:31:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:31:25,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-19 14:31:25,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:25,010 INFO L225 Difference]: With dead ends: 480 [2021-11-19 14:31:25,010 INFO L226 Difference]: Without dead ends: 309 [2021-11-19 14:31:25,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:31:25,012 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 114 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:25,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 410 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:31:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-19 14:31:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 307. [2021-11-19 14:31:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 289 states have (on average 1.1868512110726643) internal successors, (343), 300 states have internal predecessors, (343), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-19 14:31:25,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 371 transitions. [2021-11-19 14:31:25,034 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 371 transitions. Word has length 96 [2021-11-19 14:31:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:25,035 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 371 transitions. [2021-11-19 14:31:25,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 371 transitions. [2021-11-19 14:31:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:31:25,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:25,037 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:25,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:25,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:25,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:25,450 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:25,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:25,450 INFO L85 PathProgramCache]: Analyzing trace with hash -824366783, now seen corresponding path program 1 times [2021-11-19 14:31:25,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:25,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713412010] [2021-11-19 14:31:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:25,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:25,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:25,454 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:25,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:31:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:25,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:31:25,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:31:26,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:31:27,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:27,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713412010] [2021-11-19 14:31:27,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713412010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:27,348 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:27,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:31:27,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144019366] [2021-11-19 14:31:27,348 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:27,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:31:27,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:27,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:31:27,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:31:27,350 INFO L87 Difference]: Start difference. First operand 307 states and 371 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:28,084 INFO L93 Difference]: Finished difference Result 547 states and 648 transitions. [2021-11-19 14:31:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:31:28,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-19 14:31:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:28,088 INFO L225 Difference]: With dead ends: 547 [2021-11-19 14:31:28,089 INFO L226 Difference]: Without dead ends: 385 [2021-11-19 14:31:28,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:31:28,090 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 29 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:28,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 422 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:31:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-19 14:31:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2021-11-19 14:31:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 365 states have (on average 1.158904109589041) internal successors, (423), 376 states have internal predecessors, (423), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-19 14:31:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 451 transitions. [2021-11-19 14:31:28,113 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 451 transitions. Word has length 103 [2021-11-19 14:31:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:28,114 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 451 transitions. [2021-11-19 14:31:28,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 451 transitions. [2021-11-19 14:31:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 14:31:28,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:28,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:28,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:28,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:28,333 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2014363869, now seen corresponding path program 1 times [2021-11-19 14:31:28,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:28,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012618854] [2021-11-19 14:31:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:28,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:28,338 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:28,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:31:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:28,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:31:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:28,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:31:29,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:29,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012618854] [2021-11-19 14:31:29,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012618854] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:29,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:31:29,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:31:29,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929798578] [2021-11-19 14:31:29,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:29,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:31:29,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:29,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:31:29,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:31:29,244 INFO L87 Difference]: Start difference. First operand 383 states and 451 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:31:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:29,309 INFO L93 Difference]: Finished difference Result 724 states and 860 transitions. [2021-11-19 14:31:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:31:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 111 [2021-11-19 14:31:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:29,313 INFO L225 Difference]: With dead ends: 724 [2021-11-19 14:31:29,313 INFO L226 Difference]: Without dead ends: 386 [2021-11-19 14:31:29,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:31:29,315 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 2 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:29,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 596 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:31:29,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-19 14:31:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-11-19 14:31:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 367 states have (on average 1.1607629427792916) internal successors, (426), 379 states have internal predecessors, (426), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (16), 6 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-19 14:31:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 456 transitions. [2021-11-19 14:31:29,342 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 456 transitions. Word has length 111 [2021-11-19 14:31:29,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:29,343 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 456 transitions. [2021-11-19 14:31:29,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:31:29,343 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 456 transitions. [2021-11-19 14:31:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:31:29,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:29,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:29,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:29,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:29,553 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:29,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:29,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1981968123, now seen corresponding path program 1 times [2021-11-19 14:31:29,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:29,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569522780] [2021-11-19 14:31:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:29,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:29,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:29,555 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:29,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:31:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:29,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:29,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:31:30,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:30,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:31:30,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:30,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569522780] [2021-11-19 14:31:30,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569522780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:30,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1312247626] [2021-11-19 14:31:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:30,430 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:30,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:30,432 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:30,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 14:31:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:30,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:31:30,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:31:31,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:31:31,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1312247626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:31,477 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:31:31,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-19 14:31:31,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668072094] [2021-11-19 14:31:31,478 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:31,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:31:31,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:31,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:31:31,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:31,480 INFO L87 Difference]: Start difference. First operand 386 states and 456 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:31:33,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:36,084 INFO L93 Difference]: Finished difference Result 676 states and 801 transitions. [2021-11-19 14:31:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:31:36,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 113 [2021-11-19 14:31:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:36,097 INFO L225 Difference]: With dead ends: 676 [2021-11-19 14:31:36,098 INFO L226 Difference]: Without dead ends: 335 [2021-11-19 14:31:36,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:31:36,099 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 250 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:36,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 279 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-19 14:31:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-19 14:31:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 219. [2021-11-19 14:31:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 206 states have (on average 1.1699029126213591) internal successors, (241), 213 states have internal predecessors, (241), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 14:31:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 258 transitions. [2021-11-19 14:31:36,114 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 258 transitions. Word has length 113 [2021-11-19 14:31:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:36,115 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 258 transitions. [2021-11-19 14:31:36,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:31:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 258 transitions. [2021-11-19 14:31:36,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:31:36,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:36,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:36,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:36,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:36,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:36,521 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:36,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1061160779, now seen corresponding path program 1 times [2021-11-19 14:31:36,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:36,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654652485] [2021-11-19 14:31:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:36,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:36,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:36,524 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:36,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:31:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:36,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:36,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:31:37,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:31:37,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:37,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654652485] [2021-11-19 14:31:37,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654652485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:37,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [749937162] [2021-11-19 14:31:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:37,418 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:37,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:37,425 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:37,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 14:31:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:37,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:37,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:31:38,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:31:38,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [749937162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:38,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126979802] [2021-11-19 14:31:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:38,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:31:38,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:31:38,374 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:31:38,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 14:31:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:38,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:38,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:31:38,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:31:39,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126979802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:39,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:31:39,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-19 14:31:39,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283860019] [2021-11-19 14:31:39,265 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:31:39,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:31:39,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:39,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:31:39,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:31:39,267 INFO L87 Difference]: Start difference. First operand 219 states and 258 transitions. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:31:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:39,707 INFO L93 Difference]: Finished difference Result 405 states and 489 transitions. [2021-11-19 14:31:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:31:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 120 [2021-11-19 14:31:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:39,711 INFO L225 Difference]: With dead ends: 405 [2021-11-19 14:31:39,711 INFO L226 Difference]: Without dead ends: 234 [2021-11-19 14:31:39,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:31:39,713 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 52 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:39,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1170 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:31:39,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-19 14:31:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2021-11-19 14:31:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 216 states have (on average 1.1990740740740742) internal successors, (259), 223 states have internal predecessors, (259), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 14:31:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 276 transitions. [2021-11-19 14:31:39,729 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 276 transitions. Word has length 120 [2021-11-19 14:31:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:39,730 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 276 transitions. [2021-11-19 14:31:39,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:31:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 276 transitions. [2021-11-19 14:31:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:31:39,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:39,733 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:39,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:39,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:40,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:40,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:40,349 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:40,349 INFO L85 PathProgramCache]: Analyzing trace with hash 678679827, now seen corresponding path program 2 times [2021-11-19 14:31:40,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:40,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741173766] [2021-11-19 14:31:40,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:31:40,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:40,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:40,351 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:40,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:31:40,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:31:40,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:31:40,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:31:40,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:31:41,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:31:41,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:41,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741173766] [2021-11-19 14:31:41,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741173766] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:41,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2069069517] [2021-11-19 14:31:41,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:31:41,496 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:41,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:41,511 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:41,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:31:42,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:31:42,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:31:42,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:31:42,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:31:42,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:31:42,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2069069517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:42,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550563174] [2021-11-19 14:31:42,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:31:42,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:31:42,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:31:42,885 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:31:42,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 14:31:43,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:31:43,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:31:43,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:31:43,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:31:43,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:31:44,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550563174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:44,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:31:44,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-19 14:31:44,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574947951] [2021-11-19 14:31:44,011 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:31:44,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 14:31:44,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 14:31:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:31:44,014 INFO L87 Difference]: Start difference. First operand 230 states and 276 transitions. Second operand has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:31:45,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:45,268 INFO L93 Difference]: Finished difference Result 423 states and 514 transitions. [2021-11-19 14:31:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 14:31:45,269 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2021-11-19 14:31:45,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:45,271 INFO L225 Difference]: With dead ends: 423 [2021-11-19 14:31:45,271 INFO L226 Difference]: Without dead ends: 243 [2021-11-19 14:31:45,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 14:31:45,274 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 84 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:45,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1211 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:31:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-19 14:31:45,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 237. [2021-11-19 14:31:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 223 states have (on average 1.1928251121076232) internal successors, (266), 230 states have internal predecessors, (266), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 14:31:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 283 transitions. [2021-11-19 14:31:45,288 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 283 transitions. Word has length 126 [2021-11-19 14:31:45,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:45,289 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 283 transitions. [2021-11-19 14:31:45,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:31:45,289 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 283 transitions. [2021-11-19 14:31:45,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:31:45,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:45,291 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:45,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:45,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:45,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-19 14:31:45,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:45,910 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:45,910 INFO L85 PathProgramCache]: Analyzing trace with hash -71339355, now seen corresponding path program 3 times [2021-11-19 14:31:45,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:45,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533510393] [2021-11-19 14:31:45,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:31:45,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:45,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:45,913 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:45,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:31:49,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 14:31:49,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:31:49,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:31:49,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:31:50,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:31:50,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:50,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533510393] [2021-11-19 14:31:50,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533510393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:50,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [246774893] [2021-11-19 14:31:50,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:31:50,847 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:50,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:50,848 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:50,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 14:32:11,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 14:32:11,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:32:11,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:32:11,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:32:12,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:32:12,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [246774893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:12,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327989992] [2021-11-19 14:32:12,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:32:12,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:32:12,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:32:12,442 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:32:12,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37813bbe-9bbb-479d-8603-27fcebf85c35/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process