./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:34:16,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:34:16,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:34:16,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:34:16,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:34:16,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:34:16,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:34:16,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:34:16,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:34:16,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:34:16,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:34:16,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:34:16,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:34:16,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:34:16,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:34:16,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:34:16,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:34:16,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:34:16,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:34:16,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:34:16,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:34:16,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:34:16,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:34:16,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:34:16,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:34:16,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:34:16,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:34:16,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:34:16,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:34:16,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:34:16,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:34:16,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:34:16,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:34:16,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:34:16,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:34:16,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:34:16,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:34:16,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:34:16,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:34:16,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:34:16,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:34:16,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:34:16,297 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:34:16,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:34:16,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:34:16,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:34:16,299 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:34:16,299 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:34:16,299 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:34:16,299 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:34:16,300 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:34:16,300 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:34:16,300 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:34:16,300 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:34:16,300 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:34:16,301 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:34:16,301 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:34:16,301 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:34:16,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:34:16,302 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:34:16,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:34:16,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:34:16,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:34:16,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:34:16,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:34:16,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:34:16,304 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:34:16,304 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:34:16,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:34:16,305 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:34:16,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:34:16,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:34:16,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:34:16,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:16,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:34:16,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:34:16,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:34:16,307 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:34:16,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:34:16,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:34:16,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:34:16,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:34:16,308 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_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 [2021-11-13 02:34:16,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:34:16,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:34:16,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:34:16,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:34:16,612 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:34:16,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2021-11-13 02:34:16,692 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/data/7f95e9542/6171648dd3fc4df6b51da4e010adab7e/FLAGf7c09d2ab [2021-11-13 02:34:17,270 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:34:17,270 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2021-11-13 02:34:17,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/data/7f95e9542/6171648dd3fc4df6b51da4e010adab7e/FLAGf7c09d2ab [2021-11-13 02:34:17,522 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/data/7f95e9542/6171648dd3fc4df6b51da4e010adab7e [2021-11-13 02:34:17,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:34:17,526 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:34:17,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:17,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:34:17,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:34:17,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:17" (1/1) ... [2021-11-13 02:34:17,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee91d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:17, skipping insertion in model container [2021-11-13 02:34:17,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:17" (1/1) ... [2021-11-13 02:34:17,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:34:17,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:34:18,031 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i[33021,33034] [2021-11-13 02:34:18,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:18,210 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 02:34:18,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b70040d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:18, skipping insertion in model container [2021-11-13 02:34:18,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:18,211 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:34:18,213 INFO L158 Benchmark]: Toolchain (without parser) took 686.47ms. Allocated memory is still 113.2MB. Free memory was 81.6MB in the beginning and 78.0MB in the end (delta: 3.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 02:34:18,214 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 65.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:34:18,215 INFO L158 Benchmark]: CACSL2BoogieTranslator took 683.88ms. Allocated memory is still 113.2MB. Free memory was 81.6MB in the beginning and 78.0MB in the end (delta: 3.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 02:34:18,217 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 65.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 683.88ms. Allocated memory is still 113.2MB. Free memory was 81.6MB in the beginning and 78.0MB in the end (delta: 3.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:34:20,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:34:20,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:34:20,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:34:20,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:34:20,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:34:20,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:34:20,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:34:20,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:34:20,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:34:20,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:34:20,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:34:20,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:34:20,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:34:20,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:34:20,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:34:20,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:34:20,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:34:20,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:34:20,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:34:20,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:34:20,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:34:20,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:34:20,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:34:20,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:34:20,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:34:20,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:34:20,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:34:20,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:34:20,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:34:20,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:34:20,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:34:20,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:34:20,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:34:20,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:34:20,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:34:20,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:34:20,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:34:20,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:34:20,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:34:20,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:34:20,913 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:34:20,963 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:34:20,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:34:20,965 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:34:20,965 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:34:20,965 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:34:20,966 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:34:20,966 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:34:20,966 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:34:20,966 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:34:20,966 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:34:20,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:34:20,969 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:34:20,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:34:20,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:34:20,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:34:20,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:34:20,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:34:20,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:34:20,970 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:34:20,971 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:34:20,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:34:20,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:34:20,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:34:20,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:34:20,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:34:20,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:34:20,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:34:20,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:20,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:34:20,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:34:20,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:34:20,973 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:34:20,973 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:20,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:34:20,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:34:20,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:34:20,974 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_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 [2021-11-13 02:34:21,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:34:21,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:34:21,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:34:21,380 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:34:21,381 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:34:21,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2021-11-13 02:34:21,458 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/data/7ec7f7d56/1ea9140266cc47538937d1411f39e3cd/FLAGfff0f78f5 [2021-11-13 02:34:22,110 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:34:22,111 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2021-11-13 02:34:22,138 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/data/7ec7f7d56/1ea9140266cc47538937d1411f39e3cd/FLAGfff0f78f5 [2021-11-13 02:34:22,322 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/data/7ec7f7d56/1ea9140266cc47538937d1411f39e3cd [2021-11-13 02:34:22,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:34:22,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:34:22,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:22,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:34:22,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:34:22,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:22" (1/1) ... [2021-11-13 02:34:22,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c679941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:22, skipping insertion in model container [2021-11-13 02:34:22,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:22" (1/1) ... [2021-11-13 02:34:22,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:34:22,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:34:22,931 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i[33021,33034] [2021-11-13 02:34:23,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:23,154 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:34:23,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:34:23,188 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i[33021,33034] [2021-11-13 02:34:23,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:23,278 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:34:23,310 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i[33021,33034] [2021-11-13 02:34:23,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:23,446 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:34:23,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23 WrapperNode [2021-11-13 02:34:23,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:23,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:23,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:34:23,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:34:23,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23" (1/1) ... [2021-11-13 02:34:23,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23" (1/1) ... [2021-11-13 02:34:23,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:23,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:34:23,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:34:23,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:34:23,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23" (1/1) ... [2021-11-13 02:34:23,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23" (1/1) ... [2021-11-13 02:34:23,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23" (1/1) ... [2021-11-13 02:34:23,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23" (1/1) ... [2021-11-13 02:34:23,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23" (1/1) ... [2021-11-13 02:34:23,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23" (1/1) ... [2021-11-13 02:34:23,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23" (1/1) ... [2021-11-13 02:34:23,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:34:23,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:34:23,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:34:23,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:34:23,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23" (1/1) ... [2021-11-13 02:34:23,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:23,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:23,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:34:23,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:34:23,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:34:23,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 02:34:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:34:23,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:34:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 02:34:23,834 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 02:34:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:34:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:34:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:34:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:34:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:34:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 02:34:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:34:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:34:23,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:34:33,676 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:34:33,691 INFO L299 CfgBuilder]: Removed 60 assume(true) statements. [2021-11-13 02:34:33,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:33 BoogieIcfgContainer [2021-11-13 02:34:33,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:34:33,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:34:33,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:34:33,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:34:33,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:34:22" (1/3) ... [2021-11-13 02:34:33,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34743af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:33, skipping insertion in model container [2021-11-13 02:34:33,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:23" (2/3) ... [2021-11-13 02:34:33,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34743af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:33, skipping insertion in model container [2021-11-13 02:34:33,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:33" (3/3) ... [2021-11-13 02:34:33,712 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test4-1.i [2021-11-13 02:34:33,717 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:34:33,718 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:34:33,772 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:34:33,781 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:34:33,781 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:34:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 191 states have (on average 1.6806282722513088) internal successors, (321), 202 states have internal predecessors, (321), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-13 02:34:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 02:34:33,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:33,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:33,817 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:33,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1530402564, now seen corresponding path program 1 times [2021-11-13 02:34:33,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:33,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307734878] [2021-11-13 02:34:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:33,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:33,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:33,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:33,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:34:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:34,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:34,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:34,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:34,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:34,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307734878] [2021-11-13 02:34:34,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307734878] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:34,254 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:34,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:34:34,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24143751] [2021-11-13 02:34:34,257 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:34,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:34,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:34,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:34,311 INFO L87 Difference]: Start difference. First operand has 211 states, 191 states have (on average 1.6806282722513088) internal successors, (321), 202 states have internal predecessors, (321), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:34,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:34,727 INFO L93 Difference]: Finished difference Result 591 states and 1008 transitions. [2021-11-13 02:34:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:34,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-13 02:34:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:34,744 INFO L225 Difference]: With dead ends: 591 [2021-11-13 02:34:34,744 INFO L226 Difference]: Without dead ends: 378 [2021-11-13 02:34:34,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:34,753 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 599 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.37ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 287.59ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:34,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 598 Invalid, 22 Unknown, 0 Unchecked, 14.37ms Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 287.59ms Time] [2021-11-13 02:34:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-13 02:34:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-11-13 02:34:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 353 states have (on average 1.3087818696883853) internal successors, (462), 363 states have internal predecessors, (462), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 02:34:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 506 transitions. [2021-11-13 02:34:34,861 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 506 transitions. Word has length 10 [2021-11-13 02:34:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:34,862 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 506 transitions. [2021-11-13 02:34:34,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 506 transitions. [2021-11-13 02:34:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-13 02:34:34,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:34,882 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] [2021-11-13 02:34:34,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 02:34:35,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:35,104 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:35,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash 924224590, now seen corresponding path program 1 times [2021-11-13 02:34:35,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:35,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496677929] [2021-11-13 02:34:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:35,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:35,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:35,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:35,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:34:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:35,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:34:35,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 02:34:36,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 02:34:37,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:37,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496677929] [2021-11-13 02:34:37,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496677929] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:37,366 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:37,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:34:37,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899166812] [2021-11-13 02:34:37,367 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:37,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:34:37,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:37,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:34:37,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:34:37,372 INFO L87 Difference]: Start difference. First operand 378 states and 506 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:37,601 INFO L93 Difference]: Finished difference Result 756 states and 1018 transitions. [2021-11-13 02:34:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:37,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-13 02:34:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:37,607 INFO L225 Difference]: With dead ends: 756 [2021-11-13 02:34:37,607 INFO L226 Difference]: Without dead ends: 386 [2021-11-13 02:34:37,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:34:37,612 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 443 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 149.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.59ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 175.98ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:37,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 536 Invalid, 91 Unknown, 0 Unchecked, 6.59ms Time], IncrementalHoareTripleChecker [53 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 175.98ms Time] [2021-11-13 02:34:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-13 02:34:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2021-11-13 02:34:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 369 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 02:34:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 496 transitions. [2021-11-13 02:34:37,652 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 496 transitions. Word has length 206 [2021-11-13 02:34:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:37,653 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 496 transitions. [2021-11-13 02:34:37,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 496 transitions. [2021-11-13 02:34:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-13 02:34:37,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:37,661 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] [2021-11-13 02:34:37,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:37,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:37,884 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:37,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:37,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2105757494, now seen corresponding path program 1 times [2021-11-13 02:34:37,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:37,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157440303] [2021-11-13 02:34:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:37,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:37,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:37,889 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:37,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:34:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:38,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:34:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:34:39,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:34:40,430 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:40,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157440303] [2021-11-13 02:34:40,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157440303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:40,431 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:40,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:34:40,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50248154] [2021-11-13 02:34:40,431 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:40,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:40,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:40,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:40,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:34:40,433 INFO L87 Difference]: Start difference. First operand 384 states and 496 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:41,013 INFO L93 Difference]: Finished difference Result 713 states and 930 transitions. [2021-11-13 02:34:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:41,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-13 02:34:41,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:41,026 INFO L225 Difference]: With dead ends: 713 [2021-11-13 02:34:41,027 INFO L226 Difference]: Without dead ends: 382 [2021-11-13 02:34:41,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:34:41,029 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 549.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 560.45ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:41,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 1.97ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 560.45ms Time] [2021-11-13 02:34:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-13 02:34:41,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2021-11-13 02:34:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 357 states have (on average 1.257703081232493) internal successors, (449), 367 states have internal predecessors, (449), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 02:34:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 493 transitions. [2021-11-13 02:34:41,054 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 493 transitions. Word has length 206 [2021-11-13 02:34:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:41,054 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 493 transitions. [2021-11-13 02:34:41,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 493 transitions. [2021-11-13 02:34:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-13 02:34:41,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:41,059 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] [2021-11-13 02:34:41,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:41,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:41,276 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1169066583, now seen corresponding path program 1 times [2021-11-13 02:34:41,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:41,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032330374] [2021-11-13 02:34:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:41,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:41,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:41,281 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:41,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:34:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:42,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:34:42,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 02:34:42,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 02:34:43,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:43,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032330374] [2021-11-13 02:34:43,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032330374] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:43,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:34:43,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:34:43,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098370910] [2021-11-13 02:34:43,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:43,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:43,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:34:43,268 INFO L87 Difference]: Start difference. First operand 382 states and 493 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:34:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:43,385 INFO L93 Difference]: Finished difference Result 720 states and 949 transitions. [2021-11-13 02:34:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:43,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 221 [2021-11-13 02:34:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:43,389 INFO L225 Difference]: With dead ends: 720 [2021-11-13 02:34:43,389 INFO L226 Difference]: Without dead ends: 385 [2021-11-13 02:34:43,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:43,390 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.44ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.25ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:43,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 21 Unknown, 0 Unchecked, 11.44ms Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 79.25ms Time] [2021-11-13 02:34:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-13 02:34:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-13 02:34:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 370 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-13 02:34:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 500 transitions. [2021-11-13 02:34:43,413 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 500 transitions. Word has length 221 [2021-11-13 02:34:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:43,413 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 500 transitions. [2021-11-13 02:34:43,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:34:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 500 transitions. [2021-11-13 02:34:43,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-13 02:34:43,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:43,418 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] [2021-11-13 02:34:43,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:43,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:43,636 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1717089863, now seen corresponding path program 1 times [2021-11-13 02:34:43,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:43,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614524478] [2021-11-13 02:34:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:43,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:43,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:43,641 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:43,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:34:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:44,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:34:44,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 02:34:44,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:34:45,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:45,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614524478] [2021-11-13 02:34:45,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614524478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:45,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [908783387] [2021-11-13 02:34:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:45,265 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:45,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:45,269 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:45,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-13 02:34:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:45,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:34:45,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 02:34:46,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 02:34:47,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [908783387] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:47,320 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:47,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 10] imperfect sequences [5, 5] total 16 [2021-11-13 02:34:47,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900327709] [2021-11-13 02:34:47,321 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:47,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:34:47,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:47,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:34:47,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:34:47,325 INFO L87 Difference]: Start difference. First operand 385 states and 500 transitions. Second operand has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:34:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:47,638 INFO L93 Difference]: Finished difference Result 716 states and 946 transitions. [2021-11-13 02:34:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:47,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 223 [2021-11-13 02:34:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:47,645 INFO L225 Difference]: With dead ends: 716 [2021-11-13 02:34:47,645 INFO L226 Difference]: Without dead ends: 431 [2021-11-13 02:34:47,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 874 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:34:47,649 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 34 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 224.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.69ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 262.58ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:47,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1168 Invalid, 193 Unknown, 0 Unchecked, 7.69ms Time], IncrementalHoareTripleChecker [68 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 262.58ms Time] [2021-11-13 02:34:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-13 02:34:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 425. [2021-11-13 02:34:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 399 states have (on average 1.2330827067669172) internal successors, (492), 410 states have internal predecessors, (492), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-13 02:34:47,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 540 transitions. [2021-11-13 02:34:47,675 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 540 transitions. Word has length 223 [2021-11-13 02:34:47,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:47,679 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 540 transitions. [2021-11-13 02:34:47,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:34:47,679 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 540 transitions. [2021-11-13 02:34:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-13 02:34:47,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:47,684 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] [2021-11-13 02:34:47,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:47,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:48,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:48,098 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:48,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1099830731, now seen corresponding path program 1 times [2021-11-13 02:34:48,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:48,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123739017] [2021-11-13 02:34:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:48,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:48,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:48,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:48,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:34:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:48,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:34:48,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 02:34:49,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:34:49,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:49,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123739017] [2021-11-13 02:34:49,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123739017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:49,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [496802831] [2021-11-13 02:34:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:49,725 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:49,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:49,732 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:49,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-13 02:34:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:50,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:34:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 02:34:51,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 02:34:53,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [496802831] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:53,090 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:53,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:34:53,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907969847] [2021-11-13 02:34:53,091 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:53,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:53,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:53,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:53,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:34:53,092 INFO L87 Difference]: Start difference. First operand 425 states and 540 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:34:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:53,314 INFO L93 Difference]: Finished difference Result 694 states and 890 transitions. [2021-11-13 02:34:53,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:53,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 223 [2021-11-13 02:34:53,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:53,319 INFO L225 Difference]: With dead ends: 694 [2021-11-13 02:34:53,319 INFO L226 Difference]: Without dead ends: 423 [2021-11-13 02:34:53,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:34:53,321 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 60 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.65ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:53,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 525 Invalid, 9 Unknown, 0 Unchecked, 2.65ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 196.92ms Time] [2021-11-13 02:34:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-13 02:34:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2021-11-13 02:34:53,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 397 states have (on average 1.2317380352644836) internal successors, (489), 408 states have internal predecessors, (489), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-13 02:34:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 537 transitions. [2021-11-13 02:34:53,341 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 537 transitions. Word has length 223 [2021-11-13 02:34:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:53,342 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 537 transitions. [2021-11-13 02:34:53,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:34:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 537 transitions. [2021-11-13 02:34:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-13 02:34:53,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:53,347 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] [2021-11-13 02:34:53,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:53,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:53,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:53,752 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:53,752 INFO L85 PathProgramCache]: Analyzing trace with hash -174633194, now seen corresponding path program 1 times [2021-11-13 02:34:53,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:53,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091708103] [2021-11-13 02:34:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:53,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:53,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:53,755 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:53,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:34:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:54,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:34:54,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 02:34:54,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 02:34:55,379 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:55,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091708103] [2021-11-13 02:34:55,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091708103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:55,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1536688663] [2021-11-13 02:34:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:55,380 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:55,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:55,387 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:55,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-13 02:34:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:55,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:34:55,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-13 02:34:56,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-13 02:34:56,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1536688663] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:56,806 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:56,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-13 02:34:56,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376074106] [2021-11-13 02:34:56,807 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:56,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:34:56,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:56,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:34:56,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:34:56,809 INFO L87 Difference]: Start difference. First operand 423 states and 537 transitions. Second operand has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:34:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:57,019 INFO L93 Difference]: Finished difference Result 722 states and 931 transitions. [2021-11-13 02:34:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:57,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 240 [2021-11-13 02:34:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:57,023 INFO L225 Difference]: With dead ends: 722 [2021-11-13 02:34:57,023 INFO L226 Difference]: Without dead ends: 391 [2021-11-13 02:34:57,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:34:57,025 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 216 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.04ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.86ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:57,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1427 Invalid, 126 Unknown, 0 Unchecked, 7.04ms Time], IncrementalHoareTripleChecker [28 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 178.86ms Time] [2021-11-13 02:34:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-13 02:34:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 389. [2021-11-13 02:34:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 363 states have (on average 1.1928374655647382) internal successors, (433), 374 states have internal predecessors, (433), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-13 02:34:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 481 transitions. [2021-11-13 02:34:57,044 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 481 transitions. Word has length 240 [2021-11-13 02:34:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:57,044 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 481 transitions. [2021-11-13 02:34:57,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:34:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 481 transitions. [2021-11-13 02:34:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-13 02:34:57,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:57,049 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] [2021-11-13 02:34:57,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:57,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:57,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:57,468 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:57,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1439777898, now seen corresponding path program 1 times [2021-11-13 02:34:57,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:57,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081885940] [2021-11-13 02:34:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:57,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:57,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:57,471 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:57,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:34:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:58,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:34:58,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 02:34:58,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 02:34:59,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:59,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081885940] [2021-11-13 02:34:59,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081885940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:59,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [864406618] [2021-11-13 02:34:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:59,157 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:59,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:59,158 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:59,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-13 02:34:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:59,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:34:59,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 02:35:00,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 02:35:00,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [864406618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:00,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003450258] [2021-11-13 02:35:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:00,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:00,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:00,827 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:00,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 02:35:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:35:01,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:35:02,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:35:03,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003450258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:03,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:35:03,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-13 02:35:03,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009693258] [2021-11-13 02:35:03,351 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:35:03,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:35:03,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:03,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:35:03,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:35:03,355 INFO L87 Difference]: Start difference. First operand 389 states and 481 transitions. Second operand has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 02:35:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:07,109 INFO L93 Difference]: Finished difference Result 1446 states and 1829 transitions. [2021-11-13 02:35:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 02:35:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 240 [2021-11-13 02:35:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:07,129 INFO L225 Difference]: With dead ends: 1446 [2021-11-13 02:35:07,129 INFO L226 Difference]: Without dead ends: 1104 [2021-11-13 02:35:07,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1443 GetRequests, 1424 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:35:07,134 INFO L933 BasicCegarLoop]: 671 mSDtfsCounter, 1699 mSDsluCounter, 5121 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3082.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 5792 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.01ms SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3383.66ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:07,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 5792 Invalid, 686 Unknown, 0 Unchecked, 28.01ms Time], IncrementalHoareTripleChecker [187 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 3383.66ms Time] [2021-11-13 02:35:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-11-13 02:35:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1102. [2021-11-13 02:35:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1051 states have (on average 1.1826831588962892) internal successors, (1243), 1062 states have internal predecessors, (1243), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-13 02:35:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1347 transitions. [2021-11-13 02:35:07,205 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1347 transitions. Word has length 240 [2021-11-13 02:35:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:07,205 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1347 transitions. [2021-11-13 02:35:07,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 02:35:07,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1347 transitions. [2021-11-13 02:35:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-11-13 02:35:07,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:07,232 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] [2021-11-13 02:35:07,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:07,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-13 02:35:07,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:07,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:07,841 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:07,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1702258550, now seen corresponding path program 2 times [2021-11-13 02:35:07,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:07,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681967187] [2021-11-13 02:35:07,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:35:07,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:07,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:07,852 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:07,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:35:09,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:35:09,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:09,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:35:09,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-13 02:35:10,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-13 02:35:12,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:12,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681967187] [2021-11-13 02:35:12,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681967187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:12,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [419758970] [2021-11-13 02:35:12,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:35:12,794 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:12,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:35:12,805 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:35:12,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 02:35:14,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:35:14,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:14,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:35:14,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-13 02:35:16,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-13 02:35:17,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [419758970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:17,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947198446] [2021-11-13 02:35:17,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:35:17,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:17,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:17,680 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:17,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 02:35:18,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:35:18,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:18,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:35:18,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-13 02:35:20,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-13 02:35:22,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947198446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:22,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:35:22,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-13 02:35:22,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164625933] [2021-11-13 02:35:22,013 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:35:22,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 02:35:22,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 02:35:22,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:35:22,020 INFO L87 Difference]: Start difference. First operand 1102 states and 1347 transitions. Second operand has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:35:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:23,720 INFO L93 Difference]: Finished difference Result 2183 states and 2805 transitions. [2021-11-13 02:35:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 02:35:23,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 640 [2021-11-13 02:35:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:23,733 INFO L225 Difference]: With dead ends: 2183 [2021-11-13 02:35:23,734 INFO L226 Difference]: Without dead ends: 1122 [2021-11-13 02:35:23,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3859 GetRequests, 3816 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 02:35:23,741 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 126 mSDsluCounter, 2227 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 594.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 2483 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.98ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 670.27ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:23,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 2483 Invalid, 364 Unknown, 0 Unchecked, 5.98ms Time], IncrementalHoareTripleChecker [77 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 670.27ms Time] [2021-11-13 02:35:23,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-13 02:35:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1114. [2021-11-13 02:35:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1063 states have (on average 1.1843838193791156) internal successors, (1259), 1074 states have internal predecessors, (1259), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-13 02:35:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1363 transitions. [2021-11-13 02:35:23,826 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1363 transitions. Word has length 640 [2021-11-13 02:35:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:23,827 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1363 transitions. [2021-11-13 02:35:23,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:35:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1363 transitions. [2021-11-13 02:35:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-13 02:35:23,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:23,850 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] [2021-11-13 02:35:23,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:24,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:24,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:24,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:24,476 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash 666267254, now seen corresponding path program 3 times [2021-11-13 02:35:24,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:24,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963553167] [2021-11-13 02:35:24,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:35:24,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:24,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:24,483 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:24,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2ef698-0e0a-4a98-bb17-48646bb6c11e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process