./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ddeff00ba0e288e2e7b04a6005a0db991f8cee358fe3ef021af7107ab321b8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:37:50,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:37:50,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:37:51,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:37:51,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:37:51,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:37:51,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:37:51,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:37:51,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:37:51,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:37:51,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:37:51,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:37:51,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:37:51,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:37:51,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:37:51,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:37:51,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:37:51,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:37:51,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:37:51,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:37:51,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:37:51,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:37:51,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:37:51,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:37:51,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:37:51,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:37:51,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:37:51,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:37:51,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:37:51,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:37:51,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:37:51,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:37:51,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:37:51,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:37:51,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:37:51,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:37:51,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:37:51,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:37:51,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:37:51,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:37:51,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:37:51,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:37:51,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:37:51,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:37:51,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:37:51,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:37:51,160 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:37:51,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:37:51,160 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:37:51,160 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:37:51,161 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:37:51,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:37:51,162 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:37:51,162 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:37:51,163 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:37:51,163 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:37:51,163 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:37:51,163 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:37:51,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:37:51,165 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:37:51,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:37:51,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:37:51,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:37:51,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:37:51,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:37:51,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:37:51,166 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:37:51,167 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:37:51,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:37:51,167 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:37:51,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:37:51,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:37:51,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:37:51,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:37:51,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:37:51,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:37:51,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:37:51,171 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:37:51,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:37:51,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:37:51,172 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:37:51,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:37:51,172 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_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ddeff00ba0e288e2e7b04a6005a0db991f8cee358fe3ef021af7107ab321b8e [2021-11-12 23:37:51,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:37:51,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:37:51,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:37:51,514 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:37:51,515 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:37:51,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-1.i [2021-11-12 23:37:51,583 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/data/4e432ca41/8de2f4cd3b22452aaa9645ba7cc138ce/FLAG8cc1eb495 [2021-11-12 23:37:52,235 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:37:52,236 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-1.i [2021-11-12 23:37:52,276 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/data/4e432ca41/8de2f4cd3b22452aaa9645ba7cc138ce/FLAG8cc1eb495 [2021-11-12 23:37:52,469 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/data/4e432ca41/8de2f4cd3b22452aaa9645ba7cc138ce [2021-11-12 23:37:52,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:37:52,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:37:52,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:37:52,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:37:52,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:37:52,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:37:52" (1/1) ... [2021-11-12 23:37:52,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7525aa4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:52, skipping insertion in model container [2021-11-12 23:37:52,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:37:52" (1/1) ... [2021-11-12 23:37:52,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:37:52,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:37:52,930 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-1.i[33021,33034] [2021-11-12 23:37:53,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:37:53,158 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) [2021-11-12 23:37:53,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46d4b617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:53, skipping insertion in model container [2021-11-12 23:37:53,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:37:53,160 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:37:53,163 INFO L158 Benchmark]: Toolchain (without parser) took 687.47ms. Allocated memory is still 102.8MB. Free memory was 75.2MB in the beginning and 55.7MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-12 23:37:53,164 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 102.8MB. Free memory is still 78.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:37:53,166 INFO L158 Benchmark]: CACSL2BoogieTranslator took 685.11ms. Allocated memory is still 102.8MB. Free memory was 74.9MB in the beginning and 55.7MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-12 23:37:53,167 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 102.8MB. Free memory is still 78.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 685.11ms. Allocated memory is still 102.8MB. Free memory was 74.9MB in the beginning and 55.7MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ddeff00ba0e288e2e7b04a6005a0db991f8cee358fe3ef021af7107ab321b8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:37:55,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:37:55,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:37:55,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:37:55,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:37:55,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:37:55,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:37:55,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:37:55,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:37:55,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:37:55,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:37:55,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:37:55,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:37:55,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:37:55,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:37:55,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:37:55,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:37:55,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:37:55,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:37:55,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:37:55,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:37:55,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:37:55,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:37:55,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:37:55,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:37:55,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:37:55,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:37:55,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:37:55,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:37:55,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:37:55,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:37:55,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:37:55,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:37:55,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:37:55,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:37:55,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:37:55,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:37:55,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:37:55,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:37:55,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:37:55,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:37:55,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:37:55,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:37:55,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:37:55,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:37:55,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:37:55,463 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:37:55,463 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:37:55,464 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:37:55,464 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:37:55,464 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:37:55,464 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:37:55,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:37:55,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:37:55,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:37:55,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:37:55,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:37:55,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:37:55,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:37:55,468 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:37:55,468 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:37:55,469 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:37:55,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:37:55,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:37:55,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:37:55,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:37:55,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:37:55,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:37:55,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:37:55,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:37:55,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:37:55,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:37:55,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:37:55,471 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:37:55,471 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:37:55,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:37:55,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:37:55,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:37:55,472 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_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ddeff00ba0e288e2e7b04a6005a0db991f8cee358fe3ef021af7107ab321b8e [2021-11-12 23:37:55,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:37:55,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:37:55,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:37:55,958 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:37:55,960 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:37:55,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-1.i [2021-11-12 23:37:56,030 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/data/ffd711853/72e987f4675b465fbd21fcdd5ee44a0e/FLAG07c4b2097 [2021-11-12 23:37:56,740 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:37:56,741 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-1.i [2021-11-12 23:37:56,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/data/ffd711853/72e987f4675b465fbd21fcdd5ee44a0e/FLAG07c4b2097 [2021-11-12 23:37:56,918 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/data/ffd711853/72e987f4675b465fbd21fcdd5ee44a0e [2021-11-12 23:37:56,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:37:56,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:37:56,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:37:56,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:37:56,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:37:56,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:37:56" (1/1) ... [2021-11-12 23:37:56,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b3dec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:56, skipping insertion in model container [2021-11-12 23:37:56,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:37:56" (1/1) ... [2021-11-12 23:37:56,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:37:57,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:37:57,532 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-1.i[33021,33034] [2021-11-12 23:37:57,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:37:57,729 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:37:57,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:37:57,758 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-1.i[33021,33034] [2021-11-12 23:37:57,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:37:57,839 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:37:57,894 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-1.i[33021,33034] [2021-11-12 23:37:57,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:37:58,035 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:37:58,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58 WrapperNode [2021-11-12 23:37:58,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:37:58,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:37:58,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:37:58,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:37:58,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58" (1/1) ... [2021-11-12 23:37:58,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58" (1/1) ... [2021-11-12 23:37:58,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:37:58,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:37:58,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:37:58,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:37:58,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58" (1/1) ... [2021-11-12 23:37:58,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58" (1/1) ... [2021-11-12 23:37:58,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58" (1/1) ... [2021-11-12 23:37:58,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58" (1/1) ... [2021-11-12 23:37:58,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58" (1/1) ... [2021-11-12 23:37:58,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58" (1/1) ... [2021-11-12 23:37:58,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58" (1/1) ... [2021-11-12 23:37:58,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:37:58,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:37:58,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:37:58,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:37:58,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58" (1/1) ... [2021-11-12 23:37:58,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:37:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:37:58,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:37:58,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:37:58,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:37:58,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:37:58,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:37:58,437 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:37:58,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:37:58,437 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:37:58,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:37:58,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:37:58,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:37:58,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:37:58,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:37:58,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:37:58,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:37:58,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:37:58,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:38:08,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:38:08,914 INFO L299 CfgBuilder]: Removed 60 assume(true) statements. [2021-11-12 23:38:08,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:38:08 BoogieIcfgContainer [2021-11-12 23:38:08,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:38:08,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:38:08,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:38:08,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:38:08,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:37:56" (1/3) ... [2021-11-12 23:38:08,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc2fbd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:38:08, skipping insertion in model container [2021-11-12 23:38:08,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:37:58" (2/3) ... [2021-11-12 23:38:08,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc2fbd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:38:08, skipping insertion in model container [2021-11-12 23:38:08,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:38:08" (3/3) ... [2021-11-12 23:38:08,925 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test4-1.i [2021-11-12 23:38:08,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:38:08,930 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:38:08,980 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:38:08,997 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 [2021-11-12 23:38:08,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:38:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 191 states have (on average 1.6806282722513088) internal successors, (321), 202 states have internal predecessors, (321), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:38:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 23:38:09,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:09,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:09,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1530402564, now seen corresponding path program 1 times [2021-11-12 23:38:09,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:09,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169912903] [2021-11-12 23:38:09,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:09,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:09,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:09,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:38:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:09,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:09,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:38:09,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:38:09,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:09,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169912903] [2021-11-12 23:38:09,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169912903] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:09,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:09,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:38:09,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24856787] [2021-11-12 23:38:09,404 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:09,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:09,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:09,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:09,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:09,452 INFO L87 Difference]: Start difference. First operand has 211 states, 191 states have (on average 1.6806282722513088) internal successors, (321), 202 states have internal predecessors, (321), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:09,842 INFO L93 Difference]: Finished difference Result 591 states and 1008 transitions. [2021-11-12 23:38:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:09,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-12 23:38:09,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:09,858 INFO L225 Difference]: With dead ends: 591 [2021-11-12 23:38:09,859 INFO L226 Difference]: Without dead ends: 378 [2021-11-12 23:38:09,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:09,867 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 599 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.96ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 294.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:09,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 598 Invalid, 22 Unknown, 0 Unchecked, 9.96ms Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 294.64ms Time] [2021-11-12 23:38:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-12 23:38:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-11-12 23:38:09,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 353 states have (on average 1.3087818696883853) internal successors, (462), 363 states have internal predecessors, (462), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-12 23:38:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 506 transitions. [2021-11-12 23:38:09,945 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 506 transitions. Word has length 10 [2021-11-12 23:38:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:09,946 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 506 transitions. [2021-11-12 23:38:09,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 506 transitions. [2021-11-12 23:38:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-12 23:38:09,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:09,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:09,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:10,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:10,178 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:10,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:10,182 INFO L85 PathProgramCache]: Analyzing trace with hash 924224590, now seen corresponding path program 1 times [2021-11-12 23:38:10,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:10,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202116950] [2021-11-12 23:38:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:10,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:10,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:10,191 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:10,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:38:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:10,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:38:10,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:38:11,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:38:11,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:11,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202116950] [2021-11-12 23:38:11,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202116950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:11,983 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:11,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:38:11,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396558800] [2021-11-12 23:38:11,984 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:11,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:38:11,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:38:11,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:38:11,987 INFO L87 Difference]: Start difference. First operand 378 states and 506 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:12,172 INFO L93 Difference]: Finished difference Result 756 states and 1018 transitions. [2021-11-12 23:38:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-12 23:38:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:12,176 INFO L225 Difference]: With dead ends: 756 [2021-11-12 23:38:12,177 INFO L226 Difference]: Without dead ends: 386 [2021-11-12 23:38:12,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:38:12,180 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 443 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.87ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:12,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 536 Invalid, 91 Unknown, 0 Unchecked, 4.87ms Time], IncrementalHoareTripleChecker [53 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 144.00ms Time] [2021-11-12 23:38:12,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-12 23:38:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2021-11-12 23:38:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 369 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-12 23:38:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 496 transitions. [2021-11-12 23:38:12,236 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 496 transitions. Word has length 206 [2021-11-12 23:38:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:12,237 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 496 transitions. [2021-11-12 23:38:12,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 496 transitions. [2021-11-12 23:38:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-12 23:38:12,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:12,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:12,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:12,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:12,474 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:12,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2105757494, now seen corresponding path program 1 times [2021-11-12 23:38:12,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:12,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475125495] [2021-11-12 23:38:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:12,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:12,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:12,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:38:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:13,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:38:13,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:38:13,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:38:14,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:14,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475125495] [2021-11-12 23:38:14,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475125495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:14,506 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:14,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:38:14,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539359814] [2021-11-12 23:38:14,507 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:14,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:14,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:14,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:14,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:14,510 INFO L87 Difference]: Start difference. First operand 384 states and 496 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:15,235 INFO L93 Difference]: Finished difference Result 713 states and 930 transitions. [2021-11-12 23:38:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:15,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-12 23:38:15,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:15,248 INFO L225 Difference]: With dead ends: 713 [2021-11-12 23:38:15,248 INFO L226 Difference]: Without dead ends: 382 [2021-11-12 23:38:15,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:15,254 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 692.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 703.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:15,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 703.79ms Time] [2021-11-12 23:38:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-12 23:38:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2021-11-12 23:38:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 357 states have (on average 1.257703081232493) internal successors, (449), 367 states have internal predecessors, (449), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-12 23:38:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 493 transitions. [2021-11-12 23:38:15,277 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 493 transitions. Word has length 206 [2021-11-12 23:38:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:15,278 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 493 transitions. [2021-11-12 23:38:15,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 493 transitions. [2021-11-12 23:38:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-12 23:38:15,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:15,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:15,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:15,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:15,498 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:15,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:15,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1169066583, now seen corresponding path program 1 times [2021-11-12 23:38:15,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:15,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285849779] [2021-11-12 23:38:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:15,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:15,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:15,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:15,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:38:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:38:16,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-12 23:38:16,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 23:38:17,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:17,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285849779] [2021-11-12 23:38:17,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285849779] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:38:17,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:38:17,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:38:17,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840341053] [2021-11-12 23:38:17,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:17,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:17,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:17,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:17,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:38:17,057 INFO L87 Difference]: Start difference. First operand 382 states and 493 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:38:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:17,142 INFO L93 Difference]: Finished difference Result 720 states and 949 transitions. [2021-11-12 23:38:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 221 [2021-11-12 23:38:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:17,146 INFO L225 Difference]: With dead ends: 720 [2021-11-12 23:38:17,146 INFO L226 Difference]: Without dead ends: 385 [2021-11-12 23:38:17,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:17,148 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.64ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:17,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 21 Unknown, 0 Unchecked, 2.64ms Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 55.16ms Time] [2021-11-12 23:38:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-12 23:38:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-12 23:38:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 370 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-12 23:38:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 500 transitions. [2021-11-12 23:38:17,170 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 500 transitions. Word has length 221 [2021-11-12 23:38:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:17,170 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 500 transitions. [2021-11-12 23:38:17,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:38:17,171 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 500 transitions. [2021-11-12 23:38:17,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-12 23:38:17,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:17,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:17,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:17,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:17,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:17,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1717089863, now seen corresponding path program 1 times [2021-11-12 23:38:17,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:17,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772200396] [2021-11-12 23:38:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:17,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:17,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:17,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:17,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:38:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:17,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 23:38:18,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:38:19,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:19,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772200396] [2021-11-12 23:38:19,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772200396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:19,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1269475481] [2021-11-12 23:38:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:19,030 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:19,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:19,033 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:19,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 23:38:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:19,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:38:19,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:38:19,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:38:20,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1269475481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:20,951 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:20,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 10] imperfect sequences [5, 5] total 16 [2021-11-12 23:38:20,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812735121] [2021-11-12 23:38:20,951 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:20,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:38:20,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:20,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:38:20,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:38:20,953 INFO L87 Difference]: Start difference. First operand 385 states and 500 transitions. Second operand has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:38:21,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:21,217 INFO L93 Difference]: Finished difference Result 716 states and 946 transitions. [2021-11-12 23:38:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:21,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 223 [2021-11-12 23:38:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:21,223 INFO L225 Difference]: With dead ends: 716 [2021-11-12 23:38:21,223 INFO L226 Difference]: Without dead ends: 431 [2021-11-12 23:38:21,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 874 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:38:21,225 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 34 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 198.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.75ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:21,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1168 Invalid, 193 Unknown, 0 Unchecked, 5.75ms Time], IncrementalHoareTripleChecker [68 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 228.75ms Time] [2021-11-12 23:38:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-12 23:38:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 425. [2021-11-12 23:38:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 399 states have (on average 1.2330827067669172) internal successors, (492), 410 states have internal predecessors, (492), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-12 23:38:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 540 transitions. [2021-11-12 23:38:21,246 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 540 transitions. Word has length 223 [2021-11-12 23:38:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:21,249 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 540 transitions. [2021-11-12 23:38:21,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:38:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 540 transitions. [2021-11-12 23:38:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-12 23:38:21,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:21,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:21,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:21,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 23:38:21,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:21,658 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:21,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1099830731, now seen corresponding path program 1 times [2021-11-12 23:38:21,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:21,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090558085] [2021-11-12 23:38:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:21,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:21,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:21,661 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:21,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:38:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:22,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:22,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-12 23:38:22,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-12 23:38:23,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:23,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090558085] [2021-11-12 23:38:23,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090558085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:23,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1418175699] [2021-11-12 23:38:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:23,295 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:23,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:23,302 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:23,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:38:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:23,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:38:23,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:38:24,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:38:26,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1418175699] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:26,308 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:26,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 23:38:26,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556735518] [2021-11-12 23:38:26,311 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:26,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:26,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:38:26,313 INFO L87 Difference]: Start difference. First operand 425 states and 540 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:38:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:26,863 INFO L93 Difference]: Finished difference Result 694 states and 890 transitions. [2021-11-12 23:38:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:26,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 223 [2021-11-12 23:38:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:26,869 INFO L225 Difference]: With dead ends: 694 [2021-11-12 23:38:26,870 INFO L226 Difference]: Without dead ends: 423 [2021-11-12 23:38:26,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:38:26,876 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 60 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 508.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 525.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:26,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 525 Invalid, 9 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 525.68ms Time] [2021-11-12 23:38:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-12 23:38:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2021-11-12 23:38:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 397 states have (on average 1.2317380352644836) internal successors, (489), 408 states have internal predecessors, (489), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-12 23:38:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 537 transitions. [2021-11-12 23:38:26,896 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 537 transitions. Word has length 223 [2021-11-12 23:38:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:26,897 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 537 transitions. [2021-11-12 23:38:26,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:38:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 537 transitions. [2021-11-12 23:38:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-12 23:38:26,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:26,901 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:26,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:27,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:27,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:27,315 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:27,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:27,316 INFO L85 PathProgramCache]: Analyzing trace with hash -174633194, now seen corresponding path program 1 times [2021-11-12 23:38:27,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:27,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716925201] [2021-11-12 23:38:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:27,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:27,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:27,318 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:27,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:38:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:27,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:27,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:38:28,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:38:28,814 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:28,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716925201] [2021-11-12 23:38:28,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716925201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:28,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [950442435] [2021-11-12 23:38:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:28,814 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:28,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:28,816 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:28,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:38:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:29,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:38:29,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 23:38:29,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:38:30,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [950442435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:30,145 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:38:30,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-12 23:38:30,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963308147] [2021-11-12 23:38:30,146 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:30,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:38:30,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:30,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:38:30,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:38:30,148 INFO L87 Difference]: Start difference. First operand 423 states and 537 transitions. Second operand has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 23:38:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:30,395 INFO L93 Difference]: Finished difference Result 722 states and 931 transitions. [2021-11-12 23:38:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 240 [2021-11-12 23:38:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:30,399 INFO L225 Difference]: With dead ends: 722 [2021-11-12 23:38:30,400 INFO L226 Difference]: Without dead ends: 391 [2021-11-12 23:38:30,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:38:30,401 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 216 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.37ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 218.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:30,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1427 Invalid, 126 Unknown, 0 Unchecked, 5.37ms Time], IncrementalHoareTripleChecker [28 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 218.39ms Time] [2021-11-12 23:38:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-12 23:38:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 389. [2021-11-12 23:38:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 363 states have (on average 1.1928374655647382) internal successors, (433), 374 states have internal predecessors, (433), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-12 23:38:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 481 transitions. [2021-11-12 23:38:30,422 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 481 transitions. Word has length 240 [2021-11-12 23:38:30,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:30,422 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 481 transitions. [2021-11-12 23:38:30,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 23:38:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 481 transitions. [2021-11-12 23:38:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-12 23:38:30,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:30,427 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:30,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:30,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:30,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:30,842 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:30,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:30,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1439777898, now seen corresponding path program 1 times [2021-11-12 23:38:30,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:30,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911499821] [2021-11-12 23:38:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:30,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:30,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:30,845 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:30,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:38:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:31,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:38:31,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:38:32,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:32,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911499821] [2021-11-12 23:38:32,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911499821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:32,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [569822297] [2021-11-12 23:38:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:32,466 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:32,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:32,477 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:32,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:38:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:33,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-12 23:38:33,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:38:34,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [569822297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:34,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348214727] [2021-11-12 23:38:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:34,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:34,240 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:38:34,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-12 23:38:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:34,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:34,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:38:35,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:38:36,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348214727] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:36,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:38:36,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-12 23:38:36,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248846647] [2021-11-12 23:38:36,158 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:38:36,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:38:36,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:36,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:38:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:38:36,161 INFO L87 Difference]: Start difference. First operand 389 states and 481 transitions. Second operand has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:38:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:39,394 INFO L93 Difference]: Finished difference Result 1446 states and 1829 transitions. [2021-11-12 23:38:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:38:39,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 240 [2021-11-12 23:38:39,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:39,403 INFO L225 Difference]: With dead ends: 1446 [2021-11-12 23:38:39,403 INFO L226 Difference]: Without dead ends: 1104 [2021-11-12 23:38:39,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1443 GetRequests, 1424 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:38:39,405 INFO L933 BasicCegarLoop]: 671 mSDtfsCounter, 1699 mSDsluCounter, 5121 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2676.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 5792 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.24ms SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2899.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:39,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 5792 Invalid, 686 Unknown, 0 Unchecked, 20.24ms Time], IncrementalHoareTripleChecker [187 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 2899.10ms Time] [2021-11-12 23:38:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-11-12 23:38:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1102. [2021-11-12 23:38:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1051 states have (on average 1.1826831588962892) internal successors, (1243), 1062 states have internal predecessors, (1243), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-12 23:38:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1347 transitions. [2021-11-12 23:38:39,451 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1347 transitions. Word has length 240 [2021-11-12 23:38:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:39,451 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1347 transitions. [2021-11-12 23:38:39,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:38:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1347 transitions. [2021-11-12 23:38:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-11-12 23:38:39,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:39,471 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:39,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:39,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:39,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:40,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:40,085 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:40,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:40,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1702258550, now seen corresponding path program 2 times [2021-11-12 23:38:40,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:40,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202843778] [2021-11-12 23:38:40,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:38:40,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:40,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:40,090 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:40,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:38:41,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:38:41,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:38:41,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:38:41,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-12 23:38:42,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-12 23:38:44,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:44,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202843778] [2021-11-12 23:38:44,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202843778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:44,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1086930898] [2021-11-12 23:38:44,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:38:44,035 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:44,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:38:44,035 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:38:44,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 23:38:45,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:38:45,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:38:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:38:45,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-12 23:38:46,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-12 23:38:48,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1086930898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:48,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841501395] [2021-11-12 23:38:48,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:38:48,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:38:48,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:48,170 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:38:48,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-12 23:38:49,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:38:49,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:38:49,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:38:49,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-12 23:38:50,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-12 23:38:51,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841501395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:38:51,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:38:51,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-12 23:38:51,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473670734] [2021-11-12 23:38:51,617 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:38:51,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 23:38:51,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:51,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 23:38:51,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:38:51,621 INFO L87 Difference]: Start difference. First operand 1102 states and 1347 transitions. Second operand has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:38:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:52,945 INFO L93 Difference]: Finished difference Result 2183 states and 2805 transitions. [2021-11-12 23:38:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-12 23:38:52,952 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 640 [2021-11-12 23:38:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:52,960 INFO L225 Difference]: With dead ends: 2183 [2021-11-12 23:38:52,960 INFO L226 Difference]: Without dead ends: 1122 [2021-11-12 23:38:52,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3859 GetRequests, 3816 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 23:38:52,965 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 126 mSDsluCounter, 2227 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 438.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 2483 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.19ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 505.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:52,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 2483 Invalid, 364 Unknown, 0 Unchecked, 5.19ms Time], IncrementalHoareTripleChecker [77 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 505.88ms Time] [2021-11-12 23:38:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-12 23:38:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1114. [2021-11-12 23:38:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1063 states have (on average 1.1843838193791156) internal successors, (1259), 1074 states have internal predecessors, (1259), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-12 23:38:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1363 transitions. [2021-11-12 23:38:53,026 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1363 transitions. Word has length 640 [2021-11-12 23:38:53,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:53,027 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1363 transitions. [2021-11-12 23:38:53,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:38:53,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1363 transitions. [2021-11-12 23:38:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-12 23:38:53,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:53,035 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:53,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:53,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-12 23:38:53,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:53,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:53,650 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash 666267254, now seen corresponding path program 3 times [2021-11-12 23:38:53,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:53,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627507583] [2021-11-12 23:38:53,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:38:53,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:53,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:53,654 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:53,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0dcfe2-9b9b-47fc-a111-4275b091815c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process