./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 834766c90c3d5af368509ae691087999af545dba19d7eed6a5d75f823cbb2437 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:59:04,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:59:04,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:59:05,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:59:05,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:59:05,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:59:05,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:59:05,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:59:05,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:59:05,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:59:05,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:59:05,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:59:05,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:59:05,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:59:05,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:59:05,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:59:05,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:59:05,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:59:05,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:59:05,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:59:05,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:59:05,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:59:05,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:59:05,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:59:05,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:59:05,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:59:05,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:59:05,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:59:05,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:59:05,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:59:05,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:59:05,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:59:05,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:59:05,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:59:05,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:59:05,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:59:05,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:59:05,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:59:05,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:59:05,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:59:05,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:59:05,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:59:05,156 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:59:05,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:59:05,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:59:05,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:59:05,159 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:59:05,159 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:59:05,159 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:59:05,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:59:05,160 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:59:05,160 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:59:05,161 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:59:05,161 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:59:05,162 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:59:05,162 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:59:05,162 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:59:05,162 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:59:05,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:59:05,163 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:59:05,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:59:05,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:59:05,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:59:05,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:59:05,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:59:05,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:59:05,165 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:59:05,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:59:05,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:59:05,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:59:05,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:59:05,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:59:05,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:59:05,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:05,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:59:05,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:59:05,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:59:05,169 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:59:05,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:59:05,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:59:05,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:59:05,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:59:05,170 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_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 834766c90c3d5af368509ae691087999af545dba19d7eed6a5d75f823cbb2437 [2021-11-19 13:59:05,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:59:05,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:59:05,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:59:05,497 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:59:05,498 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:59:05,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i [2021-11-19 13:59:05,577 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/data/8ec0f5506/4ef04daf0f494750ad9f2a9f48a9c905/FLAG0220f0f03 [2021-11-19 13:59:06,348 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:59:06,350 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i [2021-11-19 13:59:06,382 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/data/8ec0f5506/4ef04daf0f494750ad9f2a9f48a9c905/FLAG0220f0f03 [2021-11-19 13:59:06,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/data/8ec0f5506/4ef04daf0f494750ad9f2a9f48a9c905 [2021-11-19 13:59:06,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:59:06,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:59:06,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:06,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:59:06,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:59:06,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:06" (1/1) ... [2021-11-19 13:59:06,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7728c2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:06, skipping insertion in model container [2021-11-19 13:59:06,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:06" (1/1) ... [2021-11-19 13:59:06,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:59:06,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:07,062 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i[33021,33034] [2021-11-19 13:59:07,292 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:07,304 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:59:07,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@79e87510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:07, skipping insertion in model container [2021-11-19 13:59:07,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:07,308 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:59:07,311 INFO L158 Benchmark]: Toolchain (without parser) took 824.15ms. Allocated memory is still 102.8MB. Free memory was 80.7MB in the beginning and 66.9MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 13:59:07,312 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 81.8MB. Free memory was 60.6MB in the beginning and 60.5MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:59:07,315 INFO L158 Benchmark]: CACSL2BoogieTranslator took 818.06ms. Allocated memory is still 102.8MB. Free memory was 80.3MB in the beginning and 66.9MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 13:59:07,317 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 81.8MB. Free memory was 60.6MB in the beginning and 60.5MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 818.06ms. Allocated memory is still 102.8MB. Free memory was 80.3MB in the beginning and 66.9MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 834766c90c3d5af368509ae691087999af545dba19d7eed6a5d75f823cbb2437 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:59:09,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:59:09,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:59:09,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:59:09,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:59:09,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:59:09,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:59:09,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:59:09,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:59:09,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:59:09,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:59:09,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:59:09,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:59:09,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:59:09,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:59:09,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:59:09,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:59:09,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:59:09,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:59:09,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:59:09,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:59:09,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:59:09,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:59:09,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:59:09,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:59:09,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:59:09,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:59:09,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:59:09,872 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:59:09,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:59:09,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:59:09,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:59:09,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:59:09,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:59:09,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:59:09,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:59:09,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:59:09,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:59:09,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:59:09,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:59:09,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:59:09,903 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:59:09,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:59:09,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:59:09,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:59:09,937 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:59:09,937 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:59:09,937 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:59:09,938 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:59:09,938 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:59:09,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:59:09,939 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:59:09,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:59:09,941 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:59:09,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:59:09,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:59:09,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:59:09,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:59:09,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:59:09,943 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:59:09,943 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:59:09,944 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:59:09,944 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:59:09,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:59:09,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:59:09,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:59:09,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:59:09,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:59:09,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:59:09,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:09,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:59:09,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:59:09,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:59:09,948 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:59:09,949 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:59:09,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:59:09,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:59:09,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:59:09,950 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_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 834766c90c3d5af368509ae691087999af545dba19d7eed6a5d75f823cbb2437 [2021-11-19 13:59:10,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:59:10,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:59:10,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:59:10,465 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:59:10,473 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:59:10,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i [2021-11-19 13:59:10,577 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/data/0d845e2fc/c562ab534b2d43fba25841ba4fa7dbff/FLAG3a0e0c50e [2021-11-19 13:59:11,488 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:59:11,489 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i [2021-11-19 13:59:11,517 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/data/0d845e2fc/c562ab534b2d43fba25841ba4fa7dbff/FLAG3a0e0c50e [2021-11-19 13:59:11,648 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/data/0d845e2fc/c562ab534b2d43fba25841ba4fa7dbff [2021-11-19 13:59:11,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:59:11,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:59:11,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:11,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:59:11,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:59:11,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:11" (1/1) ... [2021-11-19 13:59:11,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2276453a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:11, skipping insertion in model container [2021-11-19 13:59:11,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:11" (1/1) ... [2021-11-19 13:59:11,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:59:11,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:12,279 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i[33021,33034] [2021-11-19 13:59:12,499 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:12,525 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:59:12,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:12,562 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i[33021,33034] [2021-11-19 13:59:12,711 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:12,723 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:59:12,765 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-2.i[33021,33034] [2021-11-19 13:59:12,856 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:12,924 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:59:12,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12 WrapperNode [2021-11-19 13:59:12,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:12,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:59:12,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:59:12,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:59:12,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12" (1/1) ... [2021-11-19 13:59:13,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12" (1/1) ... [2021-11-19 13:59:13,111 INFO L137 Inliner]: procedures = 180, calls = 400, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1309 [2021-11-19 13:59:13,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:59:13,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:59:13,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:59:13,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:59:13,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12" (1/1) ... [2021-11-19 13:59:13,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12" (1/1) ... [2021-11-19 13:59:13,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12" (1/1) ... [2021-11-19 13:59:13,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12" (1/1) ... [2021-11-19 13:59:13,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12" (1/1) ... [2021-11-19 13:59:13,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12" (1/1) ... [2021-11-19 13:59:13,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12" (1/1) ... [2021-11-19 13:59:13,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:59:13,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:59:13,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:59:13,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:59:13,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12" (1/1) ... [2021-11-19 13:59:13,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:13,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:59:13,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:59:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 13:59:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:59:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 13:59:13,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 13:59:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 13:59:13,423 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 13:59:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:59:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:59:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:59:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:59:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:59:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:59:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:59:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:59:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:59:13,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:59:13,763 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:59:13,766 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:59:24,574 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:59:24,586 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:59:24,587 INFO L301 CfgBuilder]: Removed 69 assume(true) statements. [2021-11-19 13:59:24,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:59:24 BoogieIcfgContainer [2021-11-19 13:59:24,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:59:24,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:59:24,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:59:24,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:59:24,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:59:11" (1/3) ... [2021-11-19 13:59:24,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78265731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:59:24, skipping insertion in model container [2021-11-19 13:59:24,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:12" (2/3) ... [2021-11-19 13:59:24,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78265731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:59:24, skipping insertion in model container [2021-11-19 13:59:24,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:59:24" (3/3) ... [2021-11-19 13:59:24,600 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test4-2.i [2021-11-19 13:59:24,606 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:59:24,606 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:59:24,681 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:59:24,689 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:59:24,690 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:59:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 240 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 231 states have internal predecessors, (370), 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) [2021-11-19 13:59:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 13:59:24,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:24,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:24,724 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:24,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1526554564, now seen corresponding path program 1 times [2021-11-19 13:59:24,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:24,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202165422] [2021-11-19 13:59:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:24,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:24,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:24,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:24,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:59:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:24,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:59:24,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:25,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:59:25,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:25,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202165422] [2021-11-19 13:59:25,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202165422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:25,158 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:25,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:59:25,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208692778] [2021-11-19 13:59:25,161 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:25,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:25,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:25,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:59:25,199 INFO L87 Difference]: Start difference. First operand has 240 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 231 states have internal predecessors, (370), 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) [2021-11-19 13:59:25,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:25,529 INFO L93 Difference]: Finished difference Result 649 states and 1106 transitions. [2021-11-19 13:59:25,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:25,535 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 [2021-11-19 13:59:25,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:25,566 INFO L225 Difference]: With dead ends: 649 [2021-11-19 13:59:25,566 INFO L226 Difference]: Without dead ends: 378 [2021-11-19 13:59:25,575 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 [2021-11-19 13:59:25,579 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 604 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:25,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 671 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:59:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-19 13:59:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-11-19 13:59:25,657 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) [2021-11-19 13:59:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 506 transitions. [2021-11-19 13:59:25,667 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 506 transitions. Word has length 10 [2021-11-19 13:59:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:25,672 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 506 transitions. [2021-11-19 13:59:25,673 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) [2021-11-19 13:59:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 506 transitions. [2021-11-19 13:59:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-19 13:59:25,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:25,694 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] [2021-11-19 13:59:25,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 13:59:25,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:25,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:25,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 928072590, now seen corresponding path program 1 times [2021-11-19 13:59:25,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:25,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079175821] [2021-11-19 13:59:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:25,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:25,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:25,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:25,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:59:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:26,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 13:59:27,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 13:59:28,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:28,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079175821] [2021-11-19 13:59:28,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079175821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:28,007 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:28,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:59:28,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244995870] [2021-11-19 13:59:28,008 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:28,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:59:28,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:59:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:59:28,011 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) [2021-11-19 13:59:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:28,184 INFO L93 Difference]: Finished difference Result 756 states and 1018 transitions. [2021-11-19 13:59:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:28,185 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 [2021-11-19 13:59:28,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:28,188 INFO L225 Difference]: With dead ends: 756 [2021-11-19 13:59:28,188 INFO L226 Difference]: Without dead ends: 386 [2021-11-19 13:59:28,190 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 [2021-11-19 13:59:28,192 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 225 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:28,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 567 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-19 13:59:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2021-11-19 13:59:28,225 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) [2021-11-19 13:59:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 496 transitions. [2021-11-19 13:59:28,229 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 496 transitions. Word has length 206 [2021-11-19 13:59:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:28,230 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 496 transitions. [2021-11-19 13:59:28,230 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) [2021-11-19 13:59:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 496 transitions. [2021-11-19 13:59:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-19 13:59:28,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:28,238 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] [2021-11-19 13:59:28,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:28,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:28,458 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:28,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:28,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2109605494, now seen corresponding path program 1 times [2021-11-19 13:59:28,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:28,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911955275] [2021-11-19 13:59:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:28,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:28,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:28,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:28,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:59:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:29,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:29,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 13:59:29,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 13:59:30,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:30,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911955275] [2021-11-19 13:59:30,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911955275] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:30,769 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:30,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:59:30,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704323322] [2021-11-19 13:59:30,770 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:30,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:59:30,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:30,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:59:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:59:30,773 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) [2021-11-19 13:59:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:31,199 INFO L93 Difference]: Finished difference Result 713 states and 930 transitions. [2021-11-19 13:59:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:59:31,210 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 [2021-11-19 13:59:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:31,214 INFO L225 Difference]: With dead ends: 713 [2021-11-19 13:59:31,215 INFO L226 Difference]: Without dead ends: 382 [2021-11-19 13:59:31,216 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 [2021-11-19 13:59:31,218 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:31,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:59:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-19 13:59:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2021-11-19 13:59:31,267 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) [2021-11-19 13:59:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 493 transitions. [2021-11-19 13:59:31,275 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 493 transitions. Word has length 206 [2021-11-19 13:59:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:31,276 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 493 transitions. [2021-11-19 13:59:31,276 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) [2021-11-19 13:59:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 493 transitions. [2021-11-19 13:59:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-19 13:59:31,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:31,286 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] [2021-11-19 13:59:31,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:31,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:31,492 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:31,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:31,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1460062505, now seen corresponding path program 1 times [2021-11-19 13:59:31,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:31,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144199570] [2021-11-19 13:59:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:31,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:31,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:31,497 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:31,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:59:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:32,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 13:59:32,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 13:59:33,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:33,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144199570] [2021-11-19 13:59:33,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144199570] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:33,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:33,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:33,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790552696] [2021-11-19 13:59:33,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:33,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:33,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:33,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:33,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:33,600 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) [2021-11-19 13:59:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:33,695 INFO L93 Difference]: Finished difference Result 720 states and 949 transitions. [2021-11-19 13:59:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:33,695 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 [2021-11-19 13:59:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:33,699 INFO L225 Difference]: With dead ends: 720 [2021-11-19 13:59:33,699 INFO L226 Difference]: Without dead ends: 385 [2021-11-19 13:59:33,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:33,708 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:33,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:33,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-19 13:59:33,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-19 13:59:33,736 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) [2021-11-19 13:59:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 500 transitions. [2021-11-19 13:59:33,744 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 500 transitions. Word has length 221 [2021-11-19 13:59:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:33,745 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 500 transitions. [2021-11-19 13:59:33,746 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) [2021-11-19 13:59:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 500 transitions. [2021-11-19 13:59:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-19 13:59:33,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:33,756 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] [2021-11-19 13:59:33,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:33,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:33,978 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:33,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:33,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1064918201, now seen corresponding path program 1 times [2021-11-19 13:59:33,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:33,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470386529] [2021-11-19 13:59:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:33,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:33,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:33,981 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:33,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:59:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:34,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:59:34,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 13:59:35,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 13:59:35,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:35,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470386529] [2021-11-19 13:59:35,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470386529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:59:35,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [309403677] [2021-11-19 13:59:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:35,980 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:59:35,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:59:35,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:59:36,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 13:59:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:59:36,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:59:37,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:59:38,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [309403677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:38,099 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:59:38,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [5, 5] total 14 [2021-11-19 13:59:38,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292073248] [2021-11-19 13:59:38,100 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:38,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:38,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:38,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:38,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:59:38,102 INFO L87 Difference]: Start difference. First operand 385 states and 500 transitions. Second operand has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 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) [2021-11-19 13:59:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:38,348 INFO L93 Difference]: Finished difference Result 698 states and 921 transitions. [2021-11-19 13:59:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:38,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 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 [2021-11-19 13:59:38,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:38,356 INFO L225 Difference]: With dead ends: 698 [2021-11-19 13:59:38,356 INFO L226 Difference]: Without dead ends: 405 [2021-11-19 13:59:38,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:59:38,359 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 414 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:38,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 784 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:59:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-19 13:59:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 403. [2021-11-19 13:59:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 377 states have (on average 1.220159151193634) internal successors, (460), 388 states have internal predecessors, (460), 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) [2021-11-19 13:59:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 508 transitions. [2021-11-19 13:59:38,387 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 508 transitions. Word has length 223 [2021-11-19 13:59:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:38,389 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 508 transitions. [2021-11-19 13:59:38,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 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) [2021-11-19 13:59:38,391 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 508 transitions. [2021-11-19 13:59:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-19 13:59:38,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:38,396 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] [2021-11-19 13:59:38,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:38,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 13:59:38,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:38,801 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:38,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1682177333, now seen corresponding path program 1 times [2021-11-19 13:59:38,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:38,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198707792] [2021-11-19 13:59:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:38,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:38,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:38,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:38,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:59:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:39,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:59:39,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 13:59:39,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 13:59:40,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:40,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198707792] [2021-11-19 13:59:40,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198707792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:59:40,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1690492259] [2021-11-19 13:59:40,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:40,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:59:40,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:59:40,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:59:40,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 13:59:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:41,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:41,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 13:59:42,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 13:59:44,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1690492259] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:44,502 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:59:44,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 13:59:44,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630298110] [2021-11-19 13:59:44,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:44,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:59:44,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:44,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:59:44,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:59:44,505 INFO L87 Difference]: Start difference. First operand 403 states and 508 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) [2021-11-19 13:59:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:45,393 INFO L93 Difference]: Finished difference Result 661 states and 842 transitions. [2021-11-19 13:59:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:59:45,395 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 [2021-11-19 13:59:45,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:45,399 INFO L225 Difference]: With dead ends: 661 [2021-11-19 13:59:45,400 INFO L226 Difference]: Without dead ends: 401 [2021-11-19 13:59:45,401 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 [2021-11-19 13:59:45,402 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 52 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:45,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 509 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:59:45,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-19 13:59:45,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-11-19 13:59:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 375 states have (on average 1.2186666666666666) internal successors, (457), 386 states have internal predecessors, (457), 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) [2021-11-19 13:59:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 505 transitions. [2021-11-19 13:59:45,436 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 505 transitions. Word has length 223 [2021-11-19 13:59:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:45,437 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 505 transitions. [2021-11-19 13:59:45,437 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) [2021-11-19 13:59:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 505 transitions. [2021-11-19 13:59:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-19 13:59:45,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:45,442 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] [2021-11-19 13:59:45,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:45,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 13:59:45,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:45,848 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:45,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1224425174, now seen corresponding path program 1 times [2021-11-19 13:59:45,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:45,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019133113] [2021-11-19 13:59:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:45,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:45,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:45,852 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:45,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:59:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:59:46,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 13:59:47,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 13:59:47,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:47,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019133113] [2021-11-19 13:59:47,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019133113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:59:47,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1194258491] [2021-11-19 13:59:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:47,588 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:59:47,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:59:47,594 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:59:47,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 13:59:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:48,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:59:48,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-19 13:59:48,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 13:59:49,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1194258491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:49,311 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:59:49,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-19 13:59:49,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909297452] [2021-11-19 13:59:49,313 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:49,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:59:49,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:49,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:59:49,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:59:49,315 INFO L87 Difference]: Start difference. First operand 401 states and 505 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) [2021-11-19 13:59:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:49,434 INFO L93 Difference]: Finished difference Result 671 states and 853 transitions. [2021-11-19 13:59:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:49,435 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 [2021-11-19 13:59:49,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:49,439 INFO L225 Difference]: With dead ends: 671 [2021-11-19 13:59:49,439 INFO L226 Difference]: Without dead ends: 377 [2021-11-19 13:59:49,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:59:49,442 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 215 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:49,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 924 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-19 13:59:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-11-19 13:59:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 351 states have (on average 1.1937321937321936) internal successors, (419), 362 states have internal predecessors, (419), 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) [2021-11-19 13:59:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 467 transitions. [2021-11-19 13:59:49,475 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 467 transitions. Word has length 240 [2021-11-19 13:59:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:49,476 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 467 transitions. [2021-11-19 13:59:49,476 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) [2021-11-19 13:59:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 467 transitions. [2021-11-19 13:59:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-19 13:59:49,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:49,482 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] [2021-11-19 13:59:49,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:49,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:49,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:59:49,913 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash -40719530, now seen corresponding path program 1 times [2021-11-19 13:59:49,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:49,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091466668] [2021-11-19 13:59:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:49,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:49,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:49,931 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:49,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:59:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:50,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:59:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 13:59:51,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 13:59:51,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:51,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091466668] [2021-11-19 13:59:51,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091466668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:59:51,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [530744388] [2021-11-19 13:59:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:51,735 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:59:51,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:59:51,735 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:59:51,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 13:59:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:52,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:59:52,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 13:59:53,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 13:59:54,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [530744388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:59:54,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856553356] [2021-11-19 13:59:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:54,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:59:54,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:54,017 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:59:54,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 13:59:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:54,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:59:54,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 13:59:55,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 13:59:56,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856553356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:59:56,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:59:56,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-19 13:59:56,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678033159] [2021-11-19 13:59:56,521 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:59:56,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:59:56,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:59:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:59:56,526 INFO L87 Difference]: Start difference. First operand 377 states and 467 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) [2021-11-19 14:00:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:00,407 INFO L93 Difference]: Finished difference Result 1398 states and 1773 transitions. [2021-11-19 14:00:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:00:00,409 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 [2021-11-19 14:00:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:00,418 INFO L225 Difference]: With dead ends: 1398 [2021-11-19 14:00:00,419 INFO L226 Difference]: Without dead ends: 1068 [2021-11-19 14:00:00,421 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 [2021-11-19 14:00:00,422 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 1991 mSDsluCounter, 4793 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2027 SdHoareTripleChecker+Valid, 5423 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:00,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2027 Valid, 5423 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 14:00:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-11-19 14:00:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1066. [2021-11-19 14:00:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1015 states have (on average 1.1832512315270935) internal successors, (1201), 1026 states have internal predecessors, (1201), 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) [2021-11-19 14:00:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1305 transitions. [2021-11-19 14:00:00,484 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1305 transitions. Word has length 240 [2021-11-19 14:00:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:00,484 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1305 transitions. [2021-11-19 14:00:00,485 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) [2021-11-19 14:00:00,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1305 transitions. [2021-11-19 14:00:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-11-19 14:00:00,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:00,525 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] [2021-11-19 14:00:00,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:00,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:00,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:01,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:01,134 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1877096522, now seen corresponding path program 2 times [2021-11-19 14:00:01,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:01,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476117374] [2021-11-19 14:00:01,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:00:01,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:01,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:01,139 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:01,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:00:02,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:00:02,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:00:02,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:00:02,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 14:00:04,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 14:00:05,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:05,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476117374] [2021-11-19 14:00:05,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476117374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:05,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [593638327] [2021-11-19 14:00:05,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:00:05,936 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:05,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:00:05,938 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:00:05,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 14:00:08,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:00:08,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:00:08,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:00:08,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 14:00:09,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 14:00:11,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [593638327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:11,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137981730] [2021-11-19 14:00:11,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:00:11,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:11,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:11,022 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:00:11,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 14:00:12,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:00:12,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:00:12,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:00:12,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-19 14:00:13,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-19 14:00:15,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137981730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:15,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:00:15,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-19 14:00:15,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965052568] [2021-11-19 14:00:15,316 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:00:15,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 14:00:15,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:15,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 14:00:15,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:00:15,320 INFO L87 Difference]: Start difference. First operand 1066 states and 1305 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) [2021-11-19 14:00:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:17,178 INFO L93 Difference]: Finished difference Result 2111 states and 2721 transitions. [2021-11-19 14:00:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 14:00:17,180 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 [2021-11-19 14:00:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:17,189 INFO L225 Difference]: With dead ends: 2111 [2021-11-19 14:00:17,189 INFO L226 Difference]: Without dead ends: 1086 [2021-11-19 14:00:17,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3859 GetRequests, 3816 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 14:00:17,195 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 136 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2211 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:17,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2211 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:00:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-19 14:00:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1078. [2021-11-19 14:00:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1027 states have (on average 1.1850048685491723) internal successors, (1217), 1038 states have internal predecessors, (1217), 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) [2021-11-19 14:00:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1321 transitions. [2021-11-19 14:00:17,262 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1321 transitions. Word has length 640 [2021-11-19 14:00:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:17,263 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1321 transitions. [2021-11-19 14:00:17,263 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) [2021-11-19 14:00:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1321 transitions. [2021-11-19 14:00:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-19 14:00:17,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:17,285 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] [2021-11-19 14:00:17,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:17,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:17,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:17,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:17,909 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:17,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:17,910 INFO L85 PathProgramCache]: Analyzing trace with hash -357579338, now seen corresponding path program 3 times [2021-11-19 14:00:17,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:17,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891873038] [2021-11-19 14:00:17,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:00:17,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:17,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:17,915 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:17,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdcaaefa-c5cd-461c-a547-22c4d3b091f6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process