./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:45:39,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:45:39,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:45:39,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:45:39,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:45:39,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:45:39,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:45:39,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:45:39,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:45:39,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:45:39,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:45:39,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:45:39,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:45:39,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:45:39,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:45:39,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:45:39,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:45:39,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:45:39,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:45:39,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:45:39,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:45:39,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:45:39,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:45:39,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:45:39,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:45:39,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:45:39,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:45:39,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:45:39,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:45:39,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:45:39,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:45:39,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:45:39,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:45:39,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:45:39,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:45:39,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:45:39,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:45:39,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:45:39,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:45:39,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:45:39,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:45:39,819 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:45:39,865 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:45:39,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:45:39,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:45:39,869 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:45:39,869 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:45:39,869 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:45:39,869 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:45:39,870 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:45:39,876 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:45:39,876 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:45:39,877 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:45:39,878 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:45:39,878 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:45:39,878 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:45:39,878 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:45:39,879 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:45:39,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:45:39,880 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:45:39,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:45:39,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:45:39,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:45:39,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:45:39,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:45:39,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:45:39,881 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:45:39,882 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:45:39,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:45:39,882 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:45:39,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:45:39,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:45:39,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:45:39,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:45:39,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:45:39,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:45:39,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:45:39,886 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:45:39,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:45:39,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:45:39,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:45:39,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:45:39,887 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_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e [2021-11-19 14:45:40,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:45:40,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:45:40,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:45:40,265 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:45:40,266 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:45:40,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-19 14:45:40,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/data/1b9b3b185/caf7abcd49a543d88f3144e84b706834/FLAG9b6c37047 [2021-11-19 14:45:41,129 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:45:41,131 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-19 14:45:41,171 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/data/1b9b3b185/caf7abcd49a543d88f3144e84b706834/FLAG9b6c37047 [2021-11-19 14:45:41,252 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/data/1b9b3b185/caf7abcd49a543d88f3144e84b706834 [2021-11-19 14:45:41,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:45:41,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:45:41,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:41,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:45:41,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:45:41,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:41" (1/1) ... [2021-11-19 14:45:41,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0453ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:41, skipping insertion in model container [2021-11-19 14:45:41,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:41" (1/1) ... [2021-11-19 14:45:41,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:45:41,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:45:41,929 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-19 14:45:42,237 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:42,259 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:45:42,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b771fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:42, skipping insertion in model container [2021-11-19 14:45:42,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:42,261 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:45:42,263 INFO L158 Benchmark]: Toolchain (without parser) took 1002.61ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 44.9MB in the beginning and 78.8MB in the end (delta: -33.9MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. [2021-11-19 14:45:42,263 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 86.0MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:45:42,265 INFO L158 Benchmark]: CACSL2BoogieTranslator took 997.60ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 44.7MB in the beginning and 78.8MB in the end (delta: -34.1MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. [2021-11-19 14:45:42,266 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 86.0MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 997.60ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 44.7MB in the beginning and 78.8MB in the end (delta: -34.1MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:45:44,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:45:44,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:45:44,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:45:44,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:45:44,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:45:44,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:45:44,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:45:44,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:45:44,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:45:44,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:45:44,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:45:44,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:45:44,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:45:44,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:45:44,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:45:44,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:45:44,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:45:44,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:45:44,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:45:44,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:45:44,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:45:44,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:45:45,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:45:45,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:45:45,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:45:45,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:45:45,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:45:45,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:45:45,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:45:45,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:45:45,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:45:45,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:45:45,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:45:45,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:45:45,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:45:45,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:45:45,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:45:45,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:45:45,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:45:45,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:45:45,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:45:45,076 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:45:45,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:45:45,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:45:45,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:45:45,079 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:45:45,079 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:45:45,079 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:45:45,079 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:45:45,080 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:45:45,080 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:45:45,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:45:45,083 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:45:45,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:45:45,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:45:45,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:45:45,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:45:45,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:45:45,084 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:45:45,084 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:45:45,085 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:45:45,085 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:45:45,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:45:45,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:45:45,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:45:45,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:45:45,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:45:45,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:45:45,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:45:45,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:45:45,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:45:45,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:45:45,087 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:45:45,088 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:45:45,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:45:45,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:45:45,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:45:45,089 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_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e [2021-11-19 14:45:45,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:45:45,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:45:45,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:45:45,624 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:45:45,625 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:45:45,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-19 14:45:45,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/data/142b67a0c/5b55800d32f8444584b8cc9bb9255cc2/FLAG451c30b4b [2021-11-19 14:45:46,612 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:45:46,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-19 14:45:46,641 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/data/142b67a0c/5b55800d32f8444584b8cc9bb9255cc2/FLAG451c30b4b [2021-11-19 14:45:46,687 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/data/142b67a0c/5b55800d32f8444584b8cc9bb9255cc2 [2021-11-19 14:45:46,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:45:46,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:45:46,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:46,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:45:46,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:45:46,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:46" (1/1) ... [2021-11-19 14:45:46,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a5c063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:46, skipping insertion in model container [2021-11-19 14:45:46,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:45:46" (1/1) ... [2021-11-19 14:45:46,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:45:46,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:45:47,317 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-19 14:45:47,623 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:47,637 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:45:47,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:45:47,690 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-19 14:45:47,952 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:47,961 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:45:48,009 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-19 14:45:48,207 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:45:48,278 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:45:48,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48 WrapperNode [2021-11-19 14:45:48,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:45:48,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:45:48,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:45:48,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:45:48,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,540 INFO L137 Inliner]: procedures = 180, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2464 [2021-11-19 14:45:48,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:45:48,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:45:48,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:45:48,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:45:48,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:45:48,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:45:48,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:45:48,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:45:48,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48" (1/1) ... [2021-11-19 14:45:48,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:45:48,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:45:48,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:45:48,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:45:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:45:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-19 14:45:48,915 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-19 14:45:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:45:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:45:48,916 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:45:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:45:48,916 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:45:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:45:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:45:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:45:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:45:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 14:45:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:45:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:45:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:45:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:45:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:45:48,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:45:49,368 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:45:49,371 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:46:04,119 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:46:04,136 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:46:04,136 INFO L301 CfgBuilder]: Removed 168 assume(true) statements. [2021-11-19 14:46:04,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:46:04 BoogieIcfgContainer [2021-11-19 14:46:04,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:46:04,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:46:04,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:46:04,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:46:04,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:45:46" (1/3) ... [2021-11-19 14:46:04,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711f991b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:46:04, skipping insertion in model container [2021-11-19 14:46:04,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:45:48" (2/3) ... [2021-11-19 14:46:04,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@711f991b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:46:04, skipping insertion in model container [2021-11-19 14:46:04,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:46:04" (3/3) ... [2021-11-19 14:46:04,150 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-3.i [2021-11-19 14:46:04,157 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:46:04,157 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:46:04,257 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:46:04,270 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:46:04,271 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:46:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 478 states, 459 states have (on average 1.7124183006535947) internal successors, (786), 464 states have internal predecessors, (786), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-19 14:46:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 14:46:04,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:04,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:04,333 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1002051803, now seen corresponding path program 1 times [2021-11-19 14:46:04,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:04,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35143200] [2021-11-19 14:46:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:04,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:04,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:04,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:04,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:46:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:04,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:46:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:04,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:04,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:04,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35143200] [2021-11-19 14:46:04,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35143200] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:04,875 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:04,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:46:04,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617980238] [2021-11-19 14:46:04,878 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:04,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:46:04,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:46:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:46:04,920 INFO L87 Difference]: Start difference. First operand has 478 states, 459 states have (on average 1.7124183006535947) internal successors, (786), 464 states have internal predecessors, (786), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:05,058 INFO L93 Difference]: Finished difference Result 954 states and 1634 transitions. [2021-11-19 14:46:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:46:05,067 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-19 14:46:05,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:05,085 INFO L225 Difference]: With dead ends: 954 [2021-11-19 14:46:05,085 INFO L226 Difference]: Without dead ends: 424 [2021-11-19 14:46:05,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:46:05,097 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:05,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:46:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-19 14:46:05,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2021-11-19 14:46:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 406 states have (on average 1.3251231527093597) internal successors, (538), 411 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 14:46:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 565 transitions. [2021-11-19 14:46:05,199 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 565 transitions. Word has length 13 [2021-11-19 14:46:05,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:05,201 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 565 transitions. [2021-11-19 14:46:05,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 565 transitions. [2021-11-19 14:46:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 14:46:05,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:05,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:05,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:46:05,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:05,415 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1116117503, now seen corresponding path program 1 times [2021-11-19 14:46:05,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:05,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503751144] [2021-11-19 14:46:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:05,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:05,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:05,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:05,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:46:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:05,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:05,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:06,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:06,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:06,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503751144] [2021-11-19 14:46:06,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503751144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:06,328 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:06,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:46:06,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530464042] [2021-11-19 14:46:06,329 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:06,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:06,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:06,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:06,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:46:06,332 INFO L87 Difference]: Start difference. First operand 424 states and 565 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:06,591 INFO L93 Difference]: Finished difference Result 670 states and 899 transitions. [2021-11-19 14:46:06,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:46:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-19 14:46:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:06,600 INFO L225 Difference]: With dead ends: 670 [2021-11-19 14:46:06,603 INFO L226 Difference]: Without dead ends: 428 [2021-11-19 14:46:06,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:46:06,607 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 289 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:06,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 1586 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:46:06,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-19 14:46:06,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 427. [2021-11-19 14:46:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 409 states have (on average 1.3031784841075795) internal successors, (533), 414 states have internal predecessors, (533), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 14:46:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 560 transitions. [2021-11-19 14:46:06,664 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 560 transitions. Word has length 48 [2021-11-19 14:46:06,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:06,664 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 560 transitions. [2021-11-19 14:46:06,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:06,665 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 560 transitions. [2021-11-19 14:46:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 14:46:06,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:06,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:06,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:06,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:06,875 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:06,875 INFO L85 PathProgramCache]: Analyzing trace with hash 844272943, now seen corresponding path program 1 times [2021-11-19 14:46:06,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:06,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801184184] [2021-11-19 14:46:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:06,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:06,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:06,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:06,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:46:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:07,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:07,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:07,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:07,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801184184] [2021-11-19 14:46:07,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801184184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:07,817 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:07,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 14:46:07,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979346793] [2021-11-19 14:46:07,818 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:07,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:46:07,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:07,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:46:07,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:46:07,820 INFO L87 Difference]: Start difference. First operand 427 states and 560 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:08,033 INFO L93 Difference]: Finished difference Result 643 states and 849 transitions. [2021-11-19 14:46:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:46:08,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-19 14:46:08,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:08,039 INFO L225 Difference]: With dead ends: 643 [2021-11-19 14:46:08,039 INFO L226 Difference]: Without dead ends: 421 [2021-11-19 14:46:08,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:46:08,045 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 270 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 2108 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:08,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 2108 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:46:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-19 14:46:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2021-11-19 14:46:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 403 states have (on average 1.2977667493796525) internal successors, (523), 408 states have internal predecessors, (523), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 14:46:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 550 transitions. [2021-11-19 14:46:08,088 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 550 transitions. Word has length 48 [2021-11-19 14:46:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:08,088 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 550 transitions. [2021-11-19 14:46:08,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 550 transitions. [2021-11-19 14:46:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 14:46:08,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:08,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:08,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:08,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:08,324 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:08,324 INFO L85 PathProgramCache]: Analyzing trace with hash -857755915, now seen corresponding path program 1 times [2021-11-19 14:46:08,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:08,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452789544] [2021-11-19 14:46:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:08,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:08,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:08,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:08,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:46:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:08,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:08,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:08,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:46:08,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:46:08,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:46:08,873 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 14:46:08,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 14:46:08,964 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 14:46:08,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-19 14:46:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:09,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:09,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:09,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452789544] [2021-11-19 14:46:09,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452789544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:09,374 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:09,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:46:09,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709037065] [2021-11-19 14:46:09,375 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:09,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:46:09,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:09,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:46:09,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:46:09,379 INFO L87 Difference]: Start difference. First operand 421 states and 550 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:19,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:46:21,722 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:46:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:27,690 INFO L93 Difference]: Finished difference Result 739 states and 967 transitions. [2021-11-19 14:46:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:27,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-19 14:46:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:27,696 INFO L225 Difference]: With dead ends: 739 [2021-11-19 14:46:27,697 INFO L226 Difference]: Without dead ends: 496 [2021-11-19 14:46:27,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:46:27,699 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 379 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:27,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 1911 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 545 Invalid, 2 Unknown, 0 Unchecked, 18.2s Time] [2021-11-19 14:46:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-19 14:46:27,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 423. [2021-11-19 14:46:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 405 states have (on average 1.2962962962962963) internal successors, (525), 410 states have internal predecessors, (525), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 14:46:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 552 transitions. [2021-11-19 14:46:27,722 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 552 transitions. Word has length 48 [2021-11-19 14:46:27,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:27,723 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 552 transitions. [2021-11-19 14:46:27,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 552 transitions. [2021-11-19 14:46:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:46:27,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:27,726 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:27,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:27,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:27,947 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1217730649, now seen corresponding path program 1 times [2021-11-19 14:46:27,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:27,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520374754] [2021-11-19 14:46:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:27,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:27,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:27,950 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:27,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:46:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:28,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:28,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:28,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:28,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:28,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520374754] [2021-11-19 14:46:28,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520374754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:28,986 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:28,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:46:28,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944689706] [2021-11-19 14:46:28,988 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:28,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:28,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:28,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:28,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:46:28,991 INFO L87 Difference]: Start difference. First operand 423 states and 552 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:29,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:29,189 INFO L93 Difference]: Finished difference Result 935 states and 1224 transitions. [2021-11-19 14:46:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:46:29,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-19 14:46:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:29,196 INFO L225 Difference]: With dead ends: 935 [2021-11-19 14:46:29,196 INFO L226 Difference]: Without dead ends: 516 [2021-11-19 14:46:29,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:46:29,200 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 488 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:29,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 1525 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:46:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-19 14:46:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 426. [2021-11-19 14:46:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 408 states have (on average 1.2745098039215685) internal successors, (520), 413 states have internal predecessors, (520), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 14:46:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 547 transitions. [2021-11-19 14:46:29,229 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 547 transitions. Word has length 101 [2021-11-19 14:46:29,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:29,233 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 547 transitions. [2021-11-19 14:46:29,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 547 transitions. [2021-11-19 14:46:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:46:29,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:29,235 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:29,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:29,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:29,451 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:29,451 INFO L85 PathProgramCache]: Analyzing trace with hash 893903923, now seen corresponding path program 1 times [2021-11-19 14:46:29,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:29,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663138590] [2021-11-19 14:46:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:29,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:29,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:29,457 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:29,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:46:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:29,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:29,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:30,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:31,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:31,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663138590] [2021-11-19 14:46:31,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663138590] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:31,130 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:31,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:46:31,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226992275] [2021-11-19 14:46:31,131 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:31,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:46:31,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:31,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:46:31,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:46:31,133 INFO L87 Difference]: Start difference. First operand 426 states and 547 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:32,099 INFO L93 Difference]: Finished difference Result 1075 states and 1384 transitions. [2021-11-19 14:46:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:46:32,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-19 14:46:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:32,106 INFO L225 Difference]: With dead ends: 1075 [2021-11-19 14:46:32,106 INFO L226 Difference]: Without dead ends: 653 [2021-11-19 14:46:32,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:46:32,108 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 245 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:32,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1179 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:46:32,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-19 14:46:32,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 649. [2021-11-19 14:46:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 626 states have (on average 1.2747603833865815) internal successors, (798), 631 states have internal predecessors, (798), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-19 14:46:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 835 transitions. [2021-11-19 14:46:32,142 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 835 transitions. Word has length 101 [2021-11-19 14:46:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:32,143 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 835 transitions. [2021-11-19 14:46:32,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:46:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 835 transitions. [2021-11-19 14:46:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:46:32,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:32,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:32,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:32,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:32,364 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:32,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1884551189, now seen corresponding path program 1 times [2021-11-19 14:46:32,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:32,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504226556] [2021-11-19 14:46:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:32,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:32,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:32,367 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:32,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:46:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:32,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:32,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:46:33,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:46:33,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:33,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504226556] [2021-11-19 14:46:33,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504226556] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:33,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:33,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:46:33,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613837203] [2021-11-19 14:46:33,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:33,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:46:33,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:33,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:46:33,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:46:33,444 INFO L87 Difference]: Start difference. First operand 649 states and 835 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:46:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:33,578 INFO L93 Difference]: Finished difference Result 1253 states and 1619 transitions. [2021-11-19 14:46:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:46:33,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 116 [2021-11-19 14:46:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:33,584 INFO L225 Difference]: With dead ends: 1253 [2021-11-19 14:46:33,585 INFO L226 Difference]: Without dead ends: 652 [2021-11-19 14:46:33,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:46:33,587 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 2 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:33,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1598 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:46:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-19 14:46:33,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 652. [2021-11-19 14:46:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 628 states have (on average 1.2754777070063694) internal successors, (801), 634 states have internal predecessors, (801), 19 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (21), 15 states have call predecessors, (21), 18 states have call successors, (21) [2021-11-19 14:46:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 841 transitions. [2021-11-19 14:46:33,626 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 841 transitions. Word has length 116 [2021-11-19 14:46:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:33,626 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 841 transitions. [2021-11-19 14:46:33,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:46:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 841 transitions. [2021-11-19 14:46:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:46:33,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:33,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:33,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:33,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:33,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:33,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash -362072013, now seen corresponding path program 1 times [2021-11-19 14:46:33,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:33,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797515107] [2021-11-19 14:46:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:33,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:33,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:33,846 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:33,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:46:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:34,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:34,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:46:34,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:46:34,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:34,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797515107] [2021-11-19 14:46:34,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797515107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:34,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1266262631] [2021-11-19 14:46:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:34,906 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:34,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:46:34,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:46:34,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 14:46:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:35,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:35,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:46:35,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:46:36,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1266262631] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:36,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660148768] [2021-11-19 14:46:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:36,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:46:36,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:46:36,196 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:46:36,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 14:46:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:36,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:36,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:46:36,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:46:37,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660148768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:37,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:46:37,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-19 14:46:37,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517593103] [2021-11-19 14:46:37,305 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:46:37,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:46:37,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:37,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:46:37,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:46:37,308 INFO L87 Difference]: Start difference. First operand 652 states and 841 transitions. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:46:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:38,089 INFO L93 Difference]: Finished difference Result 1271 states and 1657 transitions. [2021-11-19 14:46:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:46:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 118 [2021-11-19 14:46:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:38,096 INFO L225 Difference]: With dead ends: 1271 [2021-11-19 14:46:38,097 INFO L226 Difference]: Without dead ends: 667 [2021-11-19 14:46:38,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:46:38,100 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 36 mSDsluCounter, 4207 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 4740 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:38,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 4740 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:46:38,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-19 14:46:38,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 663. [2021-11-19 14:46:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 638 states have (on average 1.2836990595611286) internal successors, (819), 644 states have internal predecessors, (819), 19 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (21), 15 states have call predecessors, (21), 18 states have call successors, (21) [2021-11-19 14:46:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 859 transitions. [2021-11-19 14:46:38,173 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 859 transitions. Word has length 118 [2021-11-19 14:46:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:38,174 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 859 transitions. [2021-11-19 14:46:38,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:46:38,175 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 859 transitions. [2021-11-19 14:46:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 14:46:38,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:38,178 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:38,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:38,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:38,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:38,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:38,803 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:38,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1311441259, now seen corresponding path program 2 times [2021-11-19 14:46:38,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:38,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133478489] [2021-11-19 14:46:38,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:46:38,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:38,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:38,805 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:38,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:46:39,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:46:39,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:46:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:46:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:46:39,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:46:40,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:40,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133478489] [2021-11-19 14:46:40,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133478489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:40,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1918545580] [2021-11-19 14:46:40,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:46:40,031 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:40,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:46:40,032 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:46:40,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:46:40,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:46:40,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:46:40,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:46:40,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:46:41,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:46:41,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1918545580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:41,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998363411] [2021-11-19 14:46:41,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:46:41,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:46:41,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:46:41,525 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:46:41,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 14:46:41,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:46:41,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:46:42,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:46:42,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:46:42,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:46:43,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998363411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:43,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:46:43,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-19 14:46:43,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561560391] [2021-11-19 14:46:43,086 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:46:43,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 14:46:43,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:43,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 14:46:43,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:46:43,088 INFO L87 Difference]: Start difference. First operand 663 states and 859 transitions. Second operand has 20 states, 20 states have (on average 6.7) internal successors, (134), 20 states have internal predecessors, (134), 2 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:46:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:44,773 INFO L93 Difference]: Finished difference Result 1297 states and 1696 transitions. [2021-11-19 14:46:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 14:46:44,774 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.7) internal successors, (134), 20 states have internal predecessors, (134), 2 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-19 14:46:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:44,782 INFO L225 Difference]: With dead ends: 1297 [2021-11-19 14:46:44,782 INFO L226 Difference]: Without dead ends: 676 [2021-11-19 14:46:44,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 14:46:44,787 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 59 mSDsluCounter, 3195 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 3731 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:44,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 3731 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:46:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-11-19 14:46:44,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 670. [2021-11-19 14:46:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 645 states have (on average 1.2806201550387597) internal successors, (826), 651 states have internal predecessors, (826), 19 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (21), 15 states have call predecessors, (21), 18 states have call successors, (21) [2021-11-19 14:46:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 866 transitions. [2021-11-19 14:46:44,822 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 866 transitions. Word has length 124 [2021-11-19 14:46:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:44,822 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 866 transitions. [2021-11-19 14:46:44,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.7) internal successors, (134), 20 states have internal predecessors, (134), 2 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:46:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 866 transitions. [2021-11-19 14:46:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:46:44,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:44,825 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:44,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:45,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:45,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:45,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:45,430 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:45,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1957809, now seen corresponding path program 3 times [2021-11-19 14:46:45,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:45,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221382220] [2021-11-19 14:46:45,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:46:45,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:45,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:45,433 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:45,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb7b34b-a29c-4d26-ac4e-0ecc54e900db/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:46:46,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:46:46,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:46:46,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:46:46,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:46,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:46:46,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:46:46,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:46:46,699 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 14:46:46,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 14:46:46,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:46:46,914 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 14:46:46,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17