./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/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 713ae5dee39d08db1e818ebc31454a222c136fde7aad4a26405d3060cfa0eeea --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:59:21,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:59:21,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:59:21,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:59:21,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:59:21,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:59:21,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:59:21,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:59:21,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:59:21,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:59:21,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:59:21,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:59:21,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:59:21,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:59:21,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:59:21,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:59:21,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:59:21,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:59:21,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:59:21,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:59:21,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:59:21,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:59:21,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:59:21,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:59:21,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:59:21,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:59:21,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:59:21,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:59:21,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:59:21,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:59:21,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:59:21,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:59:21,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:59:21,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:59:21,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:59:21,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:59:21,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:59:21,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:59:21,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:59:21,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:59:21,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:59:21,165 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:59:21,192 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:59:21,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:59:21,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:59:21,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:59:21,194 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:59:21,194 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:59:21,195 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:59:21,195 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:59:21,195 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:59:21,195 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:59:21,195 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:59:21,196 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:59:21,196 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:59:21,196 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:59:21,196 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:59:21,197 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:59:21,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:59:21,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:59:21,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:59:21,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:59:21,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:59:21,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:59:21,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:59:21,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:59:21,205 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:59:21,205 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:59:21,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:59:21,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:59:21,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:59:21,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:59:21,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:59:21,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:59:21,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:59:21,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:59:21,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:59:21,207 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:59:21,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:59:21,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:59:21,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:59:21,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:59:21,209 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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 713ae5dee39d08db1e818ebc31454a222c136fde7aad4a26405d3060cfa0eeea [2021-11-19 14:59:21,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:59:21,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:59:21,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:59:21,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:59:21,531 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:59:21,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i [2021-11-19 14:59:21,631 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/data/40d3ae23f/9d9005c9b8be4835bb5f62a11f6e59ff/FLAG12e98e67c [2021-11-19 14:59:22,269 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:59:22,269 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i [2021-11-19 14:59:22,287 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/data/40d3ae23f/9d9005c9b8be4835bb5f62a11f6e59ff/FLAG12e98e67c [2021-11-19 14:59:22,484 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/data/40d3ae23f/9d9005c9b8be4835bb5f62a11f6e59ff [2021-11-19 14:59:22,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:59:22,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:59:22,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:59:22,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:59:22,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:59:22,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:59:22" (1/1) ... [2021-11-19 14:59:22,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47dc724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:22, skipping insertion in model container [2021-11-19 14:59:22,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:59:22" (1/1) ... [2021-11-19 14:59:22,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:59:22,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:59:23,048 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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[33021,33034] [2021-11-19 14:59:23,233 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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[49681,49694] [2021-11-19 14:59:23,274 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:59:23,288 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 14:59:23,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e7721b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:23, skipping insertion in model container [2021-11-19 14:59:23,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:59:23,290 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:59:23,293 INFO L158 Benchmark]: Toolchain (without parser) took 802.13ms. Allocated memory was 79.7MB in the beginning and 102.8MB in the end (delta: 23.1MB). Free memory was 41.4MB in the beginning and 63.4MB in the end (delta: -22.0MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2021-11-19 14:59:23,294 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 79.7MB. Free memory was 44.6MB in the beginning and 44.5MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:59:23,296 INFO L158 Benchmark]: CACSL2BoogieTranslator took 799.31ms. Allocated memory was 79.7MB in the beginning and 102.8MB in the end (delta: 23.1MB). Free memory was 41.2MB in the beginning and 63.4MB in the end (delta: -22.2MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2021-11-19 14:59:23,298 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 79.7MB. Free memory was 44.6MB in the beginning and 44.5MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 799.31ms. Allocated memory was 79.7MB in the beginning and 102.8MB in the end (delta: 23.1MB). Free memory was 41.2MB in the beginning and 63.4MB in the end (delta: -22.2MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: 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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/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 713ae5dee39d08db1e818ebc31454a222c136fde7aad4a26405d3060cfa0eeea --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:59:25,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:59:25,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:59:25,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:59:25,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:59:25,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:59:25,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:59:25,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:59:25,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:59:25,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:59:25,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:59:25,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:59:25,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:59:25,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:59:25,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:59:25,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:59:25,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:59:25,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:59:25,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:59:25,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:59:25,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:59:25,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:59:25,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:59:25,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:59:25,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:59:25,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:59:25,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:59:25,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:59:25,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:59:25,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:59:25,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:59:25,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:59:25,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:59:25,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:59:25,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:59:25,754 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:59:25,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:59:25,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:59:25,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:59:25,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:59:25,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:59:25,759 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:59:25,811 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:59:25,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:59:25,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:59:25,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:59:25,814 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:59:25,814 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:59:25,814 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:59:25,814 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:59:25,815 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:59:25,816 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:59:25,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:59:25,818 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:59:25,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:59:25,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:59:25,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:59:25,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:59:25,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:59:25,820 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:59:25,820 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:59:25,820 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:59:25,820 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:59:25,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:59:25,821 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:59:25,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:59:25,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:59:25,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:59:25,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:59:25,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:59:25,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:59:25,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:59:25,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:59:25,823 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:59:25,823 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:59:25,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:59:25,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:59:25,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:59:25,825 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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 713ae5dee39d08db1e818ebc31454a222c136fde7aad4a26405d3060cfa0eeea [2021-11-19 14:59:26,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:59:26,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:59:26,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:59:26,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:59:26,268 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:59:26,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i [2021-11-19 14:59:26,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/data/958c9dd31/3f097d155a384266a6ec59b6e7a58fa1/FLAG145d833ae [2021-11-19 14:59:27,067 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:59:27,068 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i [2021-11-19 14:59:27,094 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/data/958c9dd31/3f097d155a384266a6ec59b6e7a58fa1/FLAG145d833ae [2021-11-19 14:59:27,241 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/data/958c9dd31/3f097d155a384266a6ec59b6e7a58fa1 [2021-11-19 14:59:27,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:59:27,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:59:27,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:59:27,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:59:27,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:59:27,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:59:27" (1/1) ... [2021-11-19 14:59:27,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677d44ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:27, skipping insertion in model container [2021-11-19 14:59:27,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:59:27" (1/1) ... [2021-11-19 14:59:27,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:59:27,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:59:27,838 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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[33021,33034] [2021-11-19 14:59:28,049 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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[49681,49694] [2021-11-19 14:59:28,084 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:59:28,111 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:59:28,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:59:28,177 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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[33021,33034] [2021-11-19 14:59:28,312 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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[49681,49694] [2021-11-19 14:59:28,337 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:59:28,353 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:59:28,381 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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[33021,33034] [2021-11-19 14:59:28,492 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_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-3.i[49681,49694] [2021-11-19 14:59:28,510 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:59:28,556 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:59:28,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28 WrapperNode [2021-11-19 14:59:28,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:59:28,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:59:28,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:59:28,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:59:28,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,760 INFO L137 Inliner]: procedures = 180, calls = 487, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1694 [2021-11-19 14:59:28,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:59:28,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:59:28,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:59:28,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:59:28,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:59:28,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:59:28,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:59:28,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:59:28,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:59:28,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:59:28,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:59:28,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:59:29,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:59:29,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:59:29,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:59:29,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:59:29,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:59:29,038 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:59:29,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:59:29,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:59:29,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:59:29,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:59:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 14:59:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:59:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:59:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:59:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:59:29,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:59:29,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:59:29,386 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:59:29,387 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:59:41,127 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:59:41,137 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:59:41,138 INFO L301 CfgBuilder]: Removed 100 assume(true) statements. [2021-11-19 14:59:41,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:59:41 BoogieIcfgContainer [2021-11-19 14:59:41,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:59:41,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:59:41,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:59:41,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:59:41,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:59:27" (1/3) ... [2021-11-19 14:59:41,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eeba19f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:59:41, skipping insertion in model container [2021-11-19 14:59:41,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28" (2/3) ... [2021-11-19 14:59:41,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eeba19f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:59:41, skipping insertion in model container [2021-11-19 14:59:41,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:59:41" (3/3) ... [2021-11-19 14:59:41,149 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test5-3.i [2021-11-19 14:59:41,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:59:41,154 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:59:41,206 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:59:41,213 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 14:59:41,213 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:59:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 14:59:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:59:41,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:41,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:41,246 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:41,252 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-11-19 14:59:41,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:59:41,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192518686] [2021-11-19 14:59:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:41,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:59:41,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:59:41,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:59:41,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:59:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:59:41,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:41,585 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 14:59:41,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:41,617 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 14:59:41,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:59:41,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192518686] [2021-11-19 14:59:41,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192518686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:41,619 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:59:41,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:59:41,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019838021] [2021-11-19 14:59:41,622 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:41,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:59:41,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:59:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:59:41,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:59:41,655 INFO L87 Difference]: Start difference. First operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:59:41,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:41,723 INFO L93 Difference]: Finished difference Result 614 states and 1041 transitions. [2021-11-19 14:59:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:59:41,725 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 14:59:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:41,746 INFO L225 Difference]: With dead ends: 614 [2021-11-19 14:59:41,748 INFO L226 Difference]: Without dead ends: 254 [2021-11-19 14:59:41,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:59:41,765 INFO L933 BasicCegarLoop]: 410 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, 410 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 14:59:41,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:59:41,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-19 14:59:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-19 14:59:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 14:59:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-11-19 14:59:41,834 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-11-19 14:59:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:41,835 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-11-19 14:59:41,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:59:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-11-19 14:59:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 14:59:41,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:41,839 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] [2021-11-19 14:59:41,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:42,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:59:42,040 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:42,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:42,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-11-19 14:59:42,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:59:42,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928794868] [2021-11-19 14:59:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:42,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:59:42,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:59:42,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:59:42,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:59:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:42,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:59:42,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:42,400 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 14:59:42,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:42,531 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 14:59:42,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:59:42,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928794868] [2021-11-19 14:59:42,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928794868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:42,532 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:59:42,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:59:42,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585488431] [2021-11-19 14:59:42,532 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:42,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:59:42,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:59:42,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:59:42,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:59:42,535 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 14:59:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:43,002 INFO L93 Difference]: Finished difference Result 575 states and 771 transitions. [2021-11-19 14:59:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:59:43,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 42 [2021-11-19 14:59:43,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:43,008 INFO L225 Difference]: With dead ends: 575 [2021-11-19 14:59:43,008 INFO L226 Difference]: Without dead ends: 497 [2021-11-19 14:59:43,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:59:43,011 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 871 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:43,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 690 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:59:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-19 14:59:43,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 425. [2021-11-19 14:59:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 404 states have (on average 1.306930693069307) internal successors, (528), 410 states have internal predecessors, (528), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 14:59:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 562 transitions. [2021-11-19 14:59:43,057 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 562 transitions. Word has length 42 [2021-11-19 14:59:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:43,057 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 562 transitions. [2021-11-19 14:59:43,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 14:59:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 562 transitions. [2021-11-19 14:59:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 14:59:43,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:43,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:43,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:43,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:59:43,283 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash 627365017, now seen corresponding path program 1 times [2021-11-19 14:59:43,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:59:43,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127822278] [2021-11-19 14:59:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:43,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:59:43,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:59:43,291 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:59:43,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:59:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:44,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:59:44,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:59:44,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:59:45,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:59:45,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127822278] [2021-11-19 14:59:45,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127822278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:45,336 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:59:45,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:59:45,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123683555] [2021-11-19 14:59:45,337 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:45,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:59:45,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:59:45,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:59:45,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:59:45,339 INFO L87 Difference]: Start difference. First operand 425 states and 562 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 14:59:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:45,500 INFO L93 Difference]: Finished difference Result 850 states and 1130 transitions. [2021-11-19 14:59:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:59:45,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 238 [2021-11-19 14:59:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:45,505 INFO L225 Difference]: With dead ends: 850 [2021-11-19 14:59:45,505 INFO L226 Difference]: Without dead ends: 433 [2021-11-19 14:59:45,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 471 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 14:59:45,508 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 669 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 14:59:45,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 669 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:59:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-19 14:59:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2021-11-19 14:59:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 416 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 14:59:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 552 transitions. [2021-11-19 14:59:45,556 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 552 transitions. Word has length 238 [2021-11-19 14:59:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:45,558 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 552 transitions. [2021-11-19 14:59:45,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 14:59:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 552 transitions. [2021-11-19 14:59:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 14:59:45,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:45,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:45,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:45,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:59:45,783 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:45,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1137440641, now seen corresponding path program 1 times [2021-11-19 14:59:45,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:59:45,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396030715] [2021-11-19 14:59:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:45,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:59:45,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:59:45,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:59:45,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:59:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:46,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:59:46,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:59:47,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:59:48,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:59:48,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396030715] [2021-11-19 14:59:48,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396030715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:48,011 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:59:48,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:59:48,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728950313] [2021-11-19 14:59:48,012 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:48,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:48,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:59:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:59:48,014 INFO L87 Difference]: Start difference. First operand 431 states and 552 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 14:59:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:48,634 INFO L93 Difference]: Finished difference Result 807 states and 1042 transitions. [2021-11-19 14:59:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:59:48,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 238 [2021-11-19 14:59:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:48,648 INFO L225 Difference]: With dead ends: 807 [2021-11-19 14:59:48,648 INFO L226 Difference]: Without dead ends: 429 [2021-11-19 14:59:48,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 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 14:59:48,650 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:48,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:59:48,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-19 14:59:48,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-11-19 14:59:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 408 states have (on average 1.2622549019607843) internal successors, (515), 414 states have internal predecessors, (515), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 14:59:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 549 transitions. [2021-11-19 14:59:48,677 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 549 transitions. Word has length 238 [2021-11-19 14:59:48,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:48,678 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 549 transitions. [2021-11-19 14:59:48,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 14:59:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 549 transitions. [2021-11-19 14:59:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-19 14:59:48,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:48,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:48,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:48,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:59:48,899 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:48,899 INFO L85 PathProgramCache]: Analyzing trace with hash 733455842, now seen corresponding path program 1 times [2021-11-19 14:59:48,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:59:48,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484753618] [2021-11-19 14:59:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:48,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:59:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:59:48,902 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:59:48,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:59:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:49,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:59:49,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 14:59:50,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:59:50,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:59:50,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484753618] [2021-11-19 14:59:50,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484753618] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:59:50,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:59:50,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:59:50,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736319212] [2021-11-19 14:59:50,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:50,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:59:50,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:59:50,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:59:50,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:59:50,875 INFO L87 Difference]: Start difference. First operand 429 states and 549 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 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 14:59:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:50,961 INFO L93 Difference]: Finished difference Result 814 states and 1061 transitions. [2021-11-19 14:59:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:59:50,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 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 253 [2021-11-19 14:59:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:50,965 INFO L225 Difference]: With dead ends: 814 [2021-11-19 14:59:50,965 INFO L226 Difference]: Without dead ends: 432 [2021-11-19 14:59:50,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 500 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 14:59:50,967 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:50,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:59:50,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-19 14:59:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-19 14:59:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 417 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-19 14:59:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 556 transitions. [2021-11-19 14:59:50,991 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 556 transitions. Word has length 253 [2021-11-19 14:59:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:50,992 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 556 transitions. [2021-11-19 14:59:50,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 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 14:59:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 556 transitions. [2021-11-19 14:59:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-19 14:59:50,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:50,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:51,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:51,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:59:51,211 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:51,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:51,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1488672828, now seen corresponding path program 1 times [2021-11-19 14:59:51,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:59:51,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435115109] [2021-11-19 14:59:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:51,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:59:51,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:59:51,214 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:59:51,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:59:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:51,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:59:51,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:59:52,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:59:53,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:59:53,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435115109] [2021-11-19 14:59:53,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435115109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:59:53,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304628236] [2021-11-19 14:59:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:53,050 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:59:53,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:59:53,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:59:53,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 14:59:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:59:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:59:54,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:59:55,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [304628236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:55,055 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:59:55,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [5, 5] total 14 [2021-11-19 14:59:55,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975110017] [2021-11-19 14:59:55,056 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:55,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:59:55,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:59:55,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:59:55,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:59:55,058 INFO L87 Difference]: Start difference. First operand 432 states and 556 transitions. Second operand has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 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 14:59:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:55,273 INFO L93 Difference]: Finished difference Result 792 states and 1033 transitions. [2021-11-19 14:59:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:59:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 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 255 [2021-11-19 14:59:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:55,279 INFO L225 Difference]: With dead ends: 792 [2021-11-19 14:59:55,279 INFO L226 Difference]: Without dead ends: 452 [2021-11-19 14:59:55,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:59:55,287 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 548 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:55,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 1284 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:59:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-19 14:59:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2021-11-19 14:59:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 428 states have (on average 1.2289719626168225) internal successors, (526), 435 states have internal predecessors, (526), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-19 14:59:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 564 transitions. [2021-11-19 14:59:55,327 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 564 transitions. Word has length 255 [2021-11-19 14:59:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:55,329 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 564 transitions. [2021-11-19 14:59:55,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 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 14:59:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 564 transitions. [2021-11-19 14:59:55,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-19 14:59:55,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:55,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:55,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:55,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:55,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:59:55,748 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:55,749 INFO L85 PathProgramCache]: Analyzing trace with hash -301049792, now seen corresponding path program 1 times [2021-11-19 14:59:55,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:59:55,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353327927] [2021-11-19 14:59:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:55,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:59:55,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:59:55,755 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:59:55,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:59:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:56,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:59:56,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:59:56,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:59:57,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:59:57,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353327927] [2021-11-19 14:59:57,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353327927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:59:57,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [336245284] [2021-11-19 14:59:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:57,459 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:59:57,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:59:57,460 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:59:57,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 14:59:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:57,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:59:58,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:59:58,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:59:59,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [336245284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:59,518 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:59:59,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:59:59,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821289661] [2021-11-19 14:59:59,519 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:59,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:59:59,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:59:59,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:59:59,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:59:59,520 INFO L87 Difference]: Start difference. First operand 450 states and 564 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 15:00:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:00,717 INFO L93 Difference]: Finished difference Result 982 states and 1246 transitions. [2021-11-19 15:00:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:00:00,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 255 [2021-11-19 15:00:00,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:00,722 INFO L225 Difference]: With dead ends: 982 [2021-11-19 15:00:00,722 INFO L226 Difference]: Without dead ends: 715 [2021-11-19 15:00:00,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:00:00,724 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 225 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:00,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 712 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 15:00:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-11-19 15:00:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 713. [2021-11-19 15:00:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 681 states have (on average 1.2378854625550662) internal successors, (843), 693 states have internal predecessors, (843), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (34), 19 states have call predecessors, (34), 27 states have call successors, (34) [2021-11-19 15:00:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 904 transitions. [2021-11-19 15:00:00,763 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 904 transitions. Word has length 255 [2021-11-19 15:00:00,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:00,764 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 904 transitions. [2021-11-19 15:00:00,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 15:00:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 904 transitions. [2021-11-19 15:00:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-19 15:00:00,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:00,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:00,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:00,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:01,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:00:01,178 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:01,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:01,178 INFO L85 PathProgramCache]: Analyzing trace with hash -627607892, now seen corresponding path program 1 times [2021-11-19 15:00:01,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:00:01,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108430272] [2021-11-19 15:00:01,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:01,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:00:01,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:00:01,184 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:00:01,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:00:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:01,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:00:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 15:00:02,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 15:00:02,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:00:02,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108430272] [2021-11-19 15:00:02,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108430272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:02,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [147271434] [2021-11-19 15:00:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:02,984 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:00:02,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:00:02,986 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:00:02,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 15:00:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:03,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:00:03,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 15:00:05,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 15:00:06,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [147271434] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:00:06,830 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:00:06,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 15:00:06,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653972118] [2021-11-19 15:00:06,830 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:06,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:00:06,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:00:06,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:00:06,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:00:06,832 INFO L87 Difference]: Start difference. First operand 713 states and 904 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 15:00:07,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:07,426 INFO L93 Difference]: Finished difference Result 1010 states and 1281 transitions. [2021-11-19 15:00:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:00:07,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 262 [2021-11-19 15:00:07,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:07,432 INFO L225 Difference]: With dead ends: 1010 [2021-11-19 15:00:07,432 INFO L226 Difference]: Without dead ends: 712 [2021-11-19 15:00:07,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:00:07,434 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 85 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:07,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 697 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 15:00:07,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-19 15:00:07,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 710. [2021-11-19 15:00:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 679 states have (on average 1.2385861561119293) internal successors, (841), 691 states have internal predecessors, (841), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 15:00:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 899 transitions. [2021-11-19 15:00:07,465 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 899 transitions. Word has length 262 [2021-11-19 15:00:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:07,466 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 899 transitions. [2021-11-19 15:00:07,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 15:00:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 899 transitions. [2021-11-19 15:00:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 15:00:07,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:07,470 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:07,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:07,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:07,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:00:07,887 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:07,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1990050795, now seen corresponding path program 1 times [2021-11-19 15:00:07,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:00:07,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14384807] [2021-11-19 15:00:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:07,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:00:07,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:00:07,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:00:07,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:00:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:08,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:00:08,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 15:00:09,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:00:09,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:00:09,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14384807] [2021-11-19 15:00:09,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14384807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:09,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [34262167] [2021-11-19 15:00:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:09,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:00:09,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:00:09,665 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:00:09,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 15:00:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:10,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:00:10,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 15:00:10,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 15:00:11,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [34262167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:00:11,148 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:00:11,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 7] imperfect sequences [5, 5] total 13 [2021-11-19 15:00:11,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142440015] [2021-11-19 15:00:11,149 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:11,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:00:11,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:00:11,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:00:11,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:00:11,151 INFO L87 Difference]: Start difference. First operand 710 states and 899 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:00:11,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:11,357 INFO L93 Difference]: Finished difference Result 928 states and 1207 transitions. [2021-11-19 15:00:11,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:00:11,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-19 15:00:11,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:11,365 INFO L225 Difference]: With dead ends: 928 [2021-11-19 15:00:11,365 INFO L226 Difference]: Without dead ends: 773 [2021-11-19 15:00:11,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:00:11,367 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 13 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:11,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1418 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:00:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-11-19 15:00:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 770. [2021-11-19 15:00:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 739 states have (on average 1.219215155615697) internal successors, (901), 751 states have internal predecessors, (901), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 15:00:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 959 transitions. [2021-11-19 15:00:11,404 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 959 transitions. Word has length 279 [2021-11-19 15:00:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:11,405 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 959 transitions. [2021-11-19 15:00:11,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:00:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 959 transitions. [2021-11-19 15:00:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 15:00:11,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:11,409 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:11,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:11,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:11,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:00:11,827 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:11,828 INFO L85 PathProgramCache]: Analyzing trace with hash 603847401, now seen corresponding path program 1 times [2021-11-19 15:00:11,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:00:11,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678127256] [2021-11-19 15:00:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:11,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:00:11,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:00:11,830 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:00:11,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:00:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:12,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:00:12,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 15:00:12,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:00:13,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:00:13,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678127256] [2021-11-19 15:00:13,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678127256] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:13,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [975147737] [2021-11-19 15:00:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:13,548 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:00:13,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:00:13,558 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:00:13,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 15:00:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:14,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:00:14,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-19 15:00:14,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 15:00:15,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [975147737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:00:15,292 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:00:15,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-19 15:00:15,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454393684] [2021-11-19 15:00:15,292 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:15,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:00:15,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:00:15,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:00:15,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:00:15,294 INFO L87 Difference]: Start difference. First operand 770 states and 959 transitions. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 15:00:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:15,450 INFO L93 Difference]: Finished difference Result 1397 states and 1749 transitions. [2021-11-19 15:00:15,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:00:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 279 [2021-11-19 15:00:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:15,456 INFO L225 Difference]: With dead ends: 1397 [2021-11-19 15:00:15,456 INFO L226 Difference]: Without dead ends: 734 [2021-11-19 15:00:15,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:00:15,458 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 531 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:15,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 1279 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:00:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-19 15:00:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2021-11-19 15:00:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 703 states have (on average 1.2005689900426741) internal successors, (844), 715 states have internal predecessors, (844), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 15:00:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 902 transitions. [2021-11-19 15:00:15,492 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 902 transitions. Word has length 279 [2021-11-19 15:00:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:15,492 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 902 transitions. [2021-11-19 15:00:15,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 15:00:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 902 transitions. [2021-11-19 15:00:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 15:00:15,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:15,496 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:15,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:15,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:15,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:00:15,919 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:15,919 INFO L85 PathProgramCache]: Analyzing trace with hash 874348137, now seen corresponding path program 1 times [2021-11-19 15:00:15,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:00:15,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325436122] [2021-11-19 15:00:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:15,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:00:15,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:00:15,922 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:00:15,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:00:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:00:16,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 15:00:17,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:00:17,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:00:17,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325436122] [2021-11-19 15:00:17,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325436122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:17,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [703082792] [2021-11-19 15:00:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:17,754 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:00:17,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:00:17,772 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:00:17,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 15:00:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:18,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:00:18,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 15:00:18,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 15:00:19,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [703082792] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:00:19,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:00:19,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-19 15:00:19,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714221783] [2021-11-19 15:00:19,073 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:19,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:00:19,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:00:19,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:00:19,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:00:19,074 INFO L87 Difference]: Start difference. First operand 734 states and 902 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:00:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:19,168 INFO L93 Difference]: Finished difference Result 913 states and 1144 transitions. [2021-11-19 15:00:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:00:19,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-19 15:00:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:19,176 INFO L225 Difference]: With dead ends: 913 [2021-11-19 15:00:19,176 INFO L226 Difference]: Without dead ends: 690 [2021-11-19 15:00:19,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:00:19,178 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 80 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:19,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 994 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:00:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-19 15:00:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 683. [2021-11-19 15:00:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 652 states have (on average 1.165644171779141) internal successors, (760), 664 states have internal predecessors, (760), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 15:00:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 818 transitions. [2021-11-19 15:00:19,210 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 818 transitions. Word has length 279 [2021-11-19 15:00:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:19,210 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 818 transitions. [2021-11-19 15:00:19,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:00:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 818 transitions. [2021-11-19 15:00:19,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 15:00:19,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:19,214 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:19,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:19,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:19,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:00:19,638 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:19,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:19,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1511815561, now seen corresponding path program 1 times [2021-11-19 15:00:19,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:00:19,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244379569] [2021-11-19 15:00:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:19,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:00:19,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:00:19,642 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:00:19,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:00:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:20,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:00:20,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 15:00:20,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:00:21,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:00:21,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244379569] [2021-11-19 15:00:21,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244379569] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:21,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1111310930] [2021-11-19 15:00:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:21,367 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:00:21,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:00:21,367 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:00:21,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 15:00:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:22,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:00:22,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 15:00:22,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:00:23,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1111310930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:23,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34827609] [2021-11-19 15:00:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:23,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:23,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:00:23,297 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:00:23,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 15:00:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:23,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:00:23,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 15:00:24,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 15:00:25,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34827609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:25,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:00:25,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-19 15:00:25,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528917648] [2021-11-19 15:00:25,597 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:00:25,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:00:25,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:00:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:00:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:00:25,601 INFO L87 Difference]: Start difference. First operand 683 states and 818 transitions. Second operand has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 15:00:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:28,682 INFO L93 Difference]: Finished difference Result 2877 states and 3565 transitions. [2021-11-19 15:00:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 15:00:28,684 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 279 [2021-11-19 15:00:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:28,697 INFO L225 Difference]: With dead ends: 2877 [2021-11-19 15:00:28,697 INFO L226 Difference]: Without dead ends: 2241 [2021-11-19 15:00:28,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1658 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:00:28,700 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 2267 mSDsluCounter, 4547 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2318 SdHoareTripleChecker+Valid, 5346 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:28,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2318 Valid, 5346 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 15:00:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-11-19 15:00:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1887. [2021-11-19 15:00:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1818 states have (on average 1.174917491749175) internal successors, (2136), 1830 states have internal predecessors, (2136), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-19 15:00:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2283 transitions. [2021-11-19 15:00:28,833 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2283 transitions. Word has length 279 [2021-11-19 15:00:28,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:28,834 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 2283 transitions. [2021-11-19 15:00:28,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 15:00:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2283 transitions. [2021-11-19 15:00:28,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-19 15:00:28,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:28,844 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:28,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:29,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:29,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:29,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:29,459 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:29,459 INFO L85 PathProgramCache]: Analyzing trace with hash -889533929, now seen corresponding path program 2 times [2021-11-19 15:00:29,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:00:29,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533318652] [2021-11-19 15:00:29,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:00:29,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:00:29,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:00:29,464 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:00:29,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:00:30,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:00:30,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:00:31,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:00:31,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 15:00:32,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 15:00:33,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:00:33,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533318652] [2021-11-19 15:00:33,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533318652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:33,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1682807014] [2021-11-19 15:00:33,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:00:33,768 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:00:33,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:00:33,768 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:00:33,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 15:00:36,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:00:36,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:00:36,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:00:36,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 15:00:38,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 15:00:39,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1682807014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:39,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192637307] [2021-11-19 15:00:39,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:00:39,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:39,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:00:39,349 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:00:39,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 15:00:40,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:00:40,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:00:40,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:00:40,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-19 15:00:41,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-19 15:00:43,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192637307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:00:43,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:00:43,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-19 15:00:43,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236683707] [2021-11-19 15:00:43,205 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:00:43,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 15:00:43,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:00:43,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 15:00:43,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:00:43,208 INFO L87 Difference]: Start difference. First operand 1887 states and 2283 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:00:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:44,913 INFO L93 Difference]: Finished difference Result 3753 states and 4746 transitions. [2021-11-19 15:00:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 15:00:44,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 679 [2021-11-19 15:00:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:44,926 INFO L225 Difference]: With dead ends: 3753 [2021-11-19 15:00:44,926 INFO L226 Difference]: Without dead ends: 1907 [2021-11-19 15:00:44,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4093 GetRequests, 4050 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 15:00:44,932 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 155 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 3469 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:44,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 3469 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:00:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-11-19 15:00:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1899. [2021-11-19 15:00:45,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1830 states have (on average 1.1759562841530056) internal successors, (2152), 1842 states have internal predecessors, (2152), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-19 15:00:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 2299 transitions. [2021-11-19 15:00:45,018 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 2299 transitions. Word has length 679 [2021-11-19 15:00:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:45,018 INFO L470 AbstractCegarLoop]: Abstraction has 1899 states and 2299 transitions. [2021-11-19 15:00:45,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:00:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 2299 transitions. [2021-11-19 15:00:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-19 15:00:45,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:45,029 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:45,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:45,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:45,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:45,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:45,655 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:45,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1901317097, now seen corresponding path program 3 times [2021-11-19 15:00:45,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:00:45,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003962291] [2021-11-19 15:00:45,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:00:45,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:00:45,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:00:45,660 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:00:45,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c3679ec-e53e-4c88-bdd2-b7291c826d0f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process