./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.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_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/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_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/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_2851443b-cfcf-4b4b-addb-0280c7285c84/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 adfc1710e761824cc0d761ee45a1724b8fd34135f47dcc82b27f8b64b97ca013 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:49:30,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:49:30,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:49:31,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:49:31,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:49:31,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:49:31,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:49:31,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:49:31,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:49:31,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:49:31,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:49:31,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:49:31,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:49:31,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:49:31,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:49:31,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:49:31,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:49:31,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:49:31,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:49:31,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:49:31,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:49:31,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:49:31,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:49:31,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:49:31,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:49:31,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:49:31,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:49:31,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:49:31,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:49:31,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:49:31,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:49:31,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:49:31,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:49:31,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:49:31,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:49:31,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:49:31,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:49:31,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:49:31,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:49:31,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:49:31,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:49:31,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:49:31,121 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:49:31,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:49:31,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:49:31,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:49:31,123 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:49:31,123 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:49:31,124 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:49:31,124 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:49:31,124 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:49:31,124 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:49:31,125 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:49:31,125 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:49:31,125 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:49:31,126 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:49:31,126 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:49:31,126 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:49:31,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:49:31,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:49:31,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:49:31,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:49:31,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:49:31,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:49:31,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:49:31,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:49:31,129 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:49:31,130 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:49:31,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:49:31,130 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:49:31,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:49:31,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:49:31,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:49:31,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:49:31,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:49:31,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:49:31,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:49:31,132 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:49:31,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:49:31,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:49:31,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:49:31,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:49:31,134 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_2851443b-cfcf-4b4b-addb-0280c7285c84/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adfc1710e761824cc0d761ee45a1724b8fd34135f47dcc82b27f8b64b97ca013 [2021-11-19 14:49:31,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:49:31,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:49:31,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:49:31,444 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:49:31,445 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:49:31,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i [2021-11-19 14:49:31,549 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/data/e5970fff9/116ee35977b141a79861a06475ce1fb2/FLAG51c671916 [2021-11-19 14:49:32,243 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:49:32,244 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i [2021-11-19 14:49:32,268 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/data/e5970fff9/116ee35977b141a79861a06475ce1fb2/FLAG51c671916 [2021-11-19 14:49:32,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/data/e5970fff9/116ee35977b141a79861a06475ce1fb2 [2021-11-19 14:49:32,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:49:32,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:49:32,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:49:32,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:49:32,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:49:32,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:49:32" (1/1) ... [2021-11-19 14:49:32,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d76eb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:32, skipping insertion in model container [2021-11-19 14:49:32,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:49:32" (1/1) ... [2021-11-19 14:49:32,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:49:32,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:49:33,124 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_2851443b-cfcf-4b4b-addb-0280c7285c84/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[33021,33034] [2021-11-19 14:49:33,419 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_2851443b-cfcf-4b4b-addb-0280c7285c84/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[49681,49694] [2021-11-19 14:49:33,430 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:49:33,456 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:49:33,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10c46d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:33, skipping insertion in model container [2021-11-19 14:49:33,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:49:33,458 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:49:33,462 INFO L158 Benchmark]: Toolchain (without parser) took 1032.85ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 50.2MB in the beginning and 70.4MB in the end (delta: -20.2MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2021-11-19 14:49:33,464 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 57.7MB in the beginning and 57.6MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:49:33,467 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1029.52ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 50.0MB in the beginning and 70.4MB in the end (delta: -20.4MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2021-11-19 14:49:33,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 57.7MB in the beginning and 57.6MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1029.52ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 50.0MB in the beginning and 70.4MB in the end (delta: -20.4MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/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_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/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_2851443b-cfcf-4b4b-addb-0280c7285c84/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 adfc1710e761824cc0d761ee45a1724b8fd34135f47dcc82b27f8b64b97ca013 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:49:36,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:49:36,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:49:36,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:49:36,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:49:36,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:49:36,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:49:36,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:49:36,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:49:36,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:49:36,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:49:36,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:49:36,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:49:36,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:49:36,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:49:36,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:49:36,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:49:36,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:49:36,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:49:36,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:49:36,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:49:36,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:49:36,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:49:36,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:49:36,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:49:36,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:49:36,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:49:36,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:49:36,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:49:36,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:49:36,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:49:36,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:49:36,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:49:36,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:49:36,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:49:36,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:49:36,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:49:36,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:49:36,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:49:36,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:49:36,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:49:36,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:49:36,379 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:49:36,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:49:36,381 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:49:36,381 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:49:36,381 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:49:36,381 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:49:36,382 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:49:36,382 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:49:36,382 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:49:36,382 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:49:36,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:49:36,385 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:49:36,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:49:36,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:49:36,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:49:36,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:49:36,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:49:36,386 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:49:36,386 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:49:36,387 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:49:36,387 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:49:36,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:49:36,387 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:49:36,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:49:36,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:49:36,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:49:36,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:49:36,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:49:36,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:49:36,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:49:36,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:49:36,389 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:49:36,389 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:49:36,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:49:36,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:49:36,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:49:36,390 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_2851443b-cfcf-4b4b-addb-0280c7285c84/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adfc1710e761824cc0d761ee45a1724b8fd34135f47dcc82b27f8b64b97ca013 [2021-11-19 14:49:36,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:49:36,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:49:36,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:49:36,900 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:49:36,903 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:49:36,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i [2021-11-19 14:49:36,995 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/data/99d57819e/7475bf686e784bbd98e3f70cb42c47f5/FLAG1be7e9a9d [2021-11-19 14:49:37,821 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:49:37,823 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i [2021-11-19 14:49:37,851 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/data/99d57819e/7475bf686e784bbd98e3f70cb42c47f5/FLAG1be7e9a9d [2021-11-19 14:49:37,959 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/data/99d57819e/7475bf686e784bbd98e3f70cb42c47f5 [2021-11-19 14:49:37,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:49:37,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:49:37,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:49:37,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:49:37,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:49:37,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:49:37" (1/1) ... [2021-11-19 14:49:37,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fbeaf6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:37, skipping insertion in model container [2021-11-19 14:49:37,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:49:37" (1/1) ... [2021-11-19 14:49:37,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:49:38,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:49:38,565 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_2851443b-cfcf-4b4b-addb-0280c7285c84/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[33021,33034] [2021-11-19 14:49:38,794 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_2851443b-cfcf-4b4b-addb-0280c7285c84/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[49681,49694] [2021-11-19 14:49:38,821 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:49:38,838 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:49:38,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:49:38,882 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_2851443b-cfcf-4b4b-addb-0280c7285c84/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[33021,33034] [2021-11-19 14:49:39,002 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_2851443b-cfcf-4b4b-addb-0280c7285c84/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[49681,49694] [2021-11-19 14:49:39,007 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:49:39,012 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:49:39,045 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_2851443b-cfcf-4b4b-addb-0280c7285c84/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[33021,33034] [2021-11-19 14:49:39,183 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_2851443b-cfcf-4b4b-addb-0280c7285c84/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-1.i[49681,49694] [2021-11-19 14:49:39,187 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:49:39,238 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:49:39,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39 WrapperNode [2021-11-19 14:49:39,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:49:39,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:49:39,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:49:39,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:49:39,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39" (1/1) ... [2021-11-19 14:49:39,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39" (1/1) ... [2021-11-19 14:49:39,357 INFO L137 Inliner]: procedures = 180, calls = 388, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1402 [2021-11-19 14:49:39,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:49:39,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:49:39,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:49:39,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:49:39,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39" (1/1) ... [2021-11-19 14:49:39,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39" (1/1) ... [2021-11-19 14:49:39,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39" (1/1) ... [2021-11-19 14:49:39,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39" (1/1) ... [2021-11-19 14:49:39,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39" (1/1) ... [2021-11-19 14:49:39,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39" (1/1) ... [2021-11-19 14:49:39,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39" (1/1) ... [2021-11-19 14:49:39,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:49:39,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:49:39,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:49:39,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:49:39,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39" (1/1) ... [2021-11-19 14:49:39,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:49:39,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:49:39,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:49:39,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:49:39,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:49:39,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:49:39,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:49:39,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:49:39,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:49:39,663 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:49:39,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:49:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:49:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:49:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:49:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 14:49:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:49:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:49:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:49:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:49:39,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:49:39,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:49:39,952 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:49:39,954 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:49:51,613 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:49:51,625 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:49:51,626 INFO L301 CfgBuilder]: Removed 83 assume(true) statements. [2021-11-19 14:49:51,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:49:51 BoogieIcfgContainer [2021-11-19 14:49:51,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:49:51,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:49:51,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:49:51,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:49:51,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:49:37" (1/3) ... [2021-11-19 14:49:51,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5917d2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:49:51, skipping insertion in model container [2021-11-19 14:49:51,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:49:39" (2/3) ... [2021-11-19 14:49:51,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5917d2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:49:51, skipping insertion in model container [2021-11-19 14:49:51,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:49:51" (3/3) ... [2021-11-19 14:49:51,640 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test5-1.i [2021-11-19 14:49:51,647 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:49:51,647 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:49:51,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:49:51,719 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:49:51,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:49:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 249 states have internal predecessors, (411), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 14:49:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:49:51,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:49:51,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:49:51,777 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:49:51,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:49:51,783 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-11-19 14:49:51,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:49:51,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172976783] [2021-11-19 14:49:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:49:51,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:49:51,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:49:51,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:49:51,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:49:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:49:52,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:49:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:49:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:49:52,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:49:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:49:52,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:49:52,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172976783] [2021-11-19 14:49:52,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172976783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:49:52,201 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:49:52,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:49:52,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679100679] [2021-11-19 14:49:52,204 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:49:52,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:49:52,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:49:52,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:49:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:49:52,275 INFO L87 Difference]: Start difference. First operand has 258 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 249 states have internal predecessors, (411), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:49:52,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:49:52,363 INFO L93 Difference]: Finished difference Result 514 states and 869 transitions. [2021-11-19 14:49:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:49:52,365 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 14:49:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:49:52,380 INFO L225 Difference]: With dead ends: 514 [2021-11-19 14:49:52,381 INFO L226 Difference]: Without dead ends: 254 [2021-11-19 14:49:52,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:49:52,391 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:49:52,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:49:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-19 14:49:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-19 14:49:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 14:49:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-11-19 14:49:52,458 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-11-19 14:49:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:49:52,459 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-11-19 14:49:52,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:49:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-11-19 14:49:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 14:49:52,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:49:52,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:49:52,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:49:52,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:49:52,681 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:49:52,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:49:52,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-11-19 14:49:52,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:49:52,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510673628] [2021-11-19 14:49:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:49:52,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:49:52,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:49:52,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:49:52,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:49:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:49:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:49:52,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:49:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:49:53,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:49:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:49:53,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:49:53,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510673628] [2021-11-19 14:49:53,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510673628] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:49:53,293 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:49:53,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:49:53,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638536224] [2021-11-19 14:49:53,294 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:49:53,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:49:53,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:49:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:49:53,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:49:53,297 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:49:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:49:53,727 INFO L93 Difference]: Finished difference Result 575 states and 771 transitions. [2021-11-19 14:49:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:49:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-19 14:49:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:49:53,734 INFO L225 Difference]: With dead ends: 575 [2021-11-19 14:49:53,734 INFO L226 Difference]: Without dead ends: 497 [2021-11-19 14:49:53,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:49:53,738 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 600 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:49:53,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 687 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:49:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-19 14:49:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 425. [2021-11-19 14:49:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 404 states have (on average 1.306930693069307) internal successors, (528), 410 states have internal predecessors, (528), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 14:49:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 562 transitions. [2021-11-19 14:49:53,800 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 562 transitions. Word has length 42 [2021-11-19 14:49:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:49:53,800 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 562 transitions. [2021-11-19 14:49:53,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:49:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 562 transitions. [2021-11-19 14:49:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 14:49:53,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:49:53,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:49:53,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:49:54,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:49:54,019 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:49:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:49:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash 627365017, now seen corresponding path program 1 times [2021-11-19 14:49:54,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:49:54,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896077047] [2021-11-19 14:49:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:49:54,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:49:54,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:49:54,026 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:49:54,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:49:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:49:54,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:49:54,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:49:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:49:55,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:49:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:49:56,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:49:56,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896077047] [2021-11-19 14:49:56,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896077047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:49:56,343 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:49:56,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:49:56,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364203322] [2021-11-19 14:49:56,343 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:49:56,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:49:56,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:49:56,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:49:56,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:49:56,346 INFO L87 Difference]: Start difference. First operand 425 states and 562 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:49:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:49:56,515 INFO L93 Difference]: Finished difference Result 850 states and 1130 transitions. [2021-11-19 14:49:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:49:56,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-19 14:49:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:49:56,520 INFO L225 Difference]: With dead ends: 850 [2021-11-19 14:49:56,521 INFO L226 Difference]: Without dead ends: 433 [2021-11-19 14:49:56,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:49:56,526 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:49:56,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 669 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:49:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-19 14:49:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2021-11-19 14:49:56,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 416 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 14:49:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 552 transitions. [2021-11-19 14:49:56,563 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 552 transitions. Word has length 238 [2021-11-19 14:49:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:49:56,563 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 552 transitions. [2021-11-19 14:49:56,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:49:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 552 transitions. [2021-11-19 14:49:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 14:49:56,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:49:56,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:49:56,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:49:56,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:49:56,787 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:49:56,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:49:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1137440641, now seen corresponding path program 1 times [2021-11-19 14:49:56,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:49:56,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281772451] [2021-11-19 14:49:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:49:56,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:49:56,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:49:56,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:49:56,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:49:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:49:57,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:49:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:49:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:49:58,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:49:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:49:59,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:49:59,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281772451] [2021-11-19 14:49:59,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281772451] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:49:59,534 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:49:59,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:49:59,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870017265] [2021-11-19 14:49:59,535 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:49:59,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:49:59,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:49:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:49:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:49:59,538 INFO L87 Difference]: Start difference. First operand 431 states and 552 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:49:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:49:59,873 INFO L93 Difference]: Finished difference Result 807 states and 1042 transitions. [2021-11-19 14:49:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:49:59,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-19 14:49:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:49:59,889 INFO L225 Difference]: With dead ends: 807 [2021-11-19 14:49:59,889 INFO L226 Difference]: Without dead ends: 429 [2021-11-19 14:49:59,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:49:59,895 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:49:59,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:49:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-19 14:49:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-11-19 14:49:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 408 states have (on average 1.2622549019607843) internal successors, (515), 414 states have internal predecessors, (515), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 14:49:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 549 transitions. [2021-11-19 14:49:59,942 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 549 transitions. Word has length 238 [2021-11-19 14:49:59,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:49:59,943 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 549 transitions. [2021-11-19 14:49:59,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:49:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 549 transitions. [2021-11-19 14:49:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-19 14:49:59,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:49:59,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:49:59,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:00,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:00,173 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:00,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1057265950, now seen corresponding path program 1 times [2021-11-19 14:50:00,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:00,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922965011] [2021-11-19 14:50:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:00,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:00,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:00,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:00,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:50:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:00,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:00,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 14:50:01,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:50:02,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:02,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922965011] [2021-11-19 14:50:02,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922965011] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:02,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:02,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:02,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034879050] [2021-11-19 14:50:02,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:02,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:02,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:02,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:02,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:02,403 INFO L87 Difference]: Start difference. First operand 429 states and 549 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:50:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:02,503 INFO L93 Difference]: Finished difference Result 814 states and 1061 transitions. [2021-11-19 14:50:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:02,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 253 [2021-11-19 14:50:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:02,509 INFO L225 Difference]: With dead ends: 814 [2021-11-19 14:50:02,509 INFO L226 Difference]: Without dead ends: 432 [2021-11-19 14:50:02,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:02,512 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:02,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-19 14:50:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-19 14:50:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 417 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-19 14:50:02,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 556 transitions. [2021-11-19 14:50:02,544 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 556 transitions. Word has length 253 [2021-11-19 14:50:02,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:02,545 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 556 transitions. [2021-11-19 14:50:02,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:50:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 556 transitions. [2021-11-19 14:50:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-19 14:50:02,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:02,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:02,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:02,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:02,765 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:02,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1605231932, now seen corresponding path program 1 times [2021-11-19 14:50:02,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:02,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482767936] [2021-11-19 14:50:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:02,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:02,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:02,772 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:02,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:50:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:03,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:50:03,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:50:04,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:50:04,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:04,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482767936] [2021-11-19 14:50:04,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482767936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:04,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1418933567] [2021-11-19 14:50:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:04,948 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:04,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:50:04,951 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:50:04,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 14:50:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:05,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:50:05,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:50:06,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:50:07,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1418933567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:07,371 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:07,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [5, 5] total 14 [2021-11-19 14:50:07,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557278583] [2021-11-19 14:50:07,373 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:07,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:50:07,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:50:07,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:50:07,375 INFO L87 Difference]: Start difference. First operand 432 states and 556 transitions. Second operand has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:50:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:07,693 INFO L93 Difference]: Finished difference Result 792 states and 1033 transitions. [2021-11-19 14:50:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:07,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-19 14:50:07,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:07,699 INFO L225 Difference]: With dead ends: 792 [2021-11-19 14:50:07,699 INFO L226 Difference]: Without dead ends: 452 [2021-11-19 14:50:07,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:50:07,701 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 535 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:07,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 1659 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:50:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-19 14:50:07,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2021-11-19 14:50:07,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 428 states have (on average 1.2289719626168225) internal successors, (526), 435 states have internal predecessors, (526), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-19 14:50:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 564 transitions. [2021-11-19 14:50:07,742 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 564 transitions. Word has length 255 [2021-11-19 14:50:07,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:07,744 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 564 transitions. [2021-11-19 14:50:07,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:50:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 564 transitions. [2021-11-19 14:50:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-19 14:50:07,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:07,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:07,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-19 14:50:07,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:08,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:08,162 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:08,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:08,163 INFO L85 PathProgramCache]: Analyzing trace with hash -417608896, now seen corresponding path program 1 times [2021-11-19 14:50:08,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:08,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859405759] [2021-11-19 14:50:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:08,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:08,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:08,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:08,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:50:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:08,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:50:08,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:50:09,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:50:10,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:10,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859405759] [2021-11-19 14:50:10,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859405759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:10,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [209269680] [2021-11-19 14:50:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:10,172 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:10,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:50:10,174 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:50:10,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 14:50:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:10,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:10,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:50:11,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:50:12,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [209269680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:12,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:12,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:50:12,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887463713] [2021-11-19 14:50:12,210 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:12,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:50:12,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:50:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:50:12,212 INFO L87 Difference]: Start difference. First operand 450 states and 564 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:50:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:12,968 INFO L93 Difference]: Finished difference Result 982 states and 1246 transitions. [2021-11-19 14:50:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:50:12,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-19 14:50:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:12,975 INFO L225 Difference]: With dead ends: 982 [2021-11-19 14:50:12,975 INFO L226 Difference]: Without dead ends: 715 [2021-11-19 14:50:12,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:50:12,977 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 225 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:12,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 741 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:50:12,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-11-19 14:50:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 713. [2021-11-19 14:50:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 681 states have (on average 1.2378854625550662) internal successors, (843), 693 states have internal predecessors, (843), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (34), 19 states have call predecessors, (34), 27 states have call successors, (34) [2021-11-19 14:50:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 904 transitions. [2021-11-19 14:50:13,017 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 904 transitions. Word has length 255 [2021-11-19 14:50:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:13,018 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 904 transitions. [2021-11-19 14:50:13,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:50:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 904 transitions. [2021-11-19 14:50:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-19 14:50:13,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:13,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:13,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:13,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:13,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:13,443 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:13,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:13,444 INFO L85 PathProgramCache]: Analyzing trace with hash 806527916, now seen corresponding path program 1 times [2021-11-19 14:50:13,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:13,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863005242] [2021-11-19 14:50:13,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:13,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:13,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:13,446 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:13,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:50:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:14,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:50:14,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:50:14,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:50:15,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:15,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863005242] [2021-11-19 14:50:15,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863005242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:15,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [988789349] [2021-11-19 14:50:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:15,343 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:15,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:50:15,344 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:50:15,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 14:50:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:15,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:15,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 14:50:18,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 14:50:20,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [988789349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:20,259 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:20,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:50:20,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716150676] [2021-11-19 14:50:20,261 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:20,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:50:20,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:50:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:50:20,265 INFO L87 Difference]: Start difference. First operand 713 states and 904 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:50:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:21,100 INFO L93 Difference]: Finished difference Result 1010 states and 1281 transitions. [2021-11-19 14:50:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:50:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 262 [2021-11-19 14:50:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:21,107 INFO L225 Difference]: With dead ends: 1010 [2021-11-19 14:50:21,107 INFO L226 Difference]: Without dead ends: 712 [2021-11-19 14:50:21,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:50:21,110 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 85 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:21,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 697 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:50:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-19 14:50:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 710. [2021-11-19 14:50:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 679 states have (on average 1.2385861561119293) internal successors, (841), 691 states have internal predecessors, (841), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 14:50:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 899 transitions. [2021-11-19 14:50:21,150 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 899 transitions. Word has length 262 [2021-11-19 14:50:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:21,150 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 899 transitions. [2021-11-19 14:50:21,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:50:21,151 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 899 transitions. [2021-11-19 14:50:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 14:50:21,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:21,158 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:21,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:21,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:21,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:21,571 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:21,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:21,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2097064427, now seen corresponding path program 1 times [2021-11-19 14:50:21,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:21,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254121720] [2021-11-19 14:50:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:21,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:21,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:21,577 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:21,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:50:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:22,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:50:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:23,102 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 14:50:23,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:23,812 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 14:50:23,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:23,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254121720] [2021-11-19 14:50:23,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254121720] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:23,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1881215140] [2021-11-19 14:50:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:23,813 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:23,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:50:23,822 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:50:23,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 14:50:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:24,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 14:50:25,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 14:50:25,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1881215140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:25,726 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:25,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 7] imperfect sequences [5, 5] total 13 [2021-11-19 14:50:25,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560224674] [2021-11-19 14:50:25,727 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:25,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:50:25,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:25,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:50:25,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:25,729 INFO L87 Difference]: Start difference. First operand 710 states and 899 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:50:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:25,983 INFO L93 Difference]: Finished difference Result 928 states and 1207 transitions. [2021-11-19 14:50:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:50:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-19 14:50:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:25,992 INFO L225 Difference]: With dead ends: 928 [2021-11-19 14:50:25,992 INFO L226 Difference]: Without dead ends: 773 [2021-11-19 14:50:25,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:25,996 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 20 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:25,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 856 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:25,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-11-19 14:50:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 770. [2021-11-19 14:50:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 739 states have (on average 1.219215155615697) internal successors, (901), 751 states have internal predecessors, (901), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 14:50:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 959 transitions. [2021-11-19 14:50:26,040 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 959 transitions. Word has length 279 [2021-11-19 14:50:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:26,040 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 959 transitions. [2021-11-19 14:50:26,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:50:26,041 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 959 transitions. [2021-11-19 14:50:26,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 14:50:26,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:26,045 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:26,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:26,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:26,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:26,459 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:26,460 INFO L85 PathProgramCache]: Analyzing trace with hash 710861033, now seen corresponding path program 1 times [2021-11-19 14:50:26,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:26,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736262843] [2021-11-19 14:50:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:26,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:26,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:26,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:26,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:50:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:27,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:50:27,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:27,833 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 14:50:27,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:28,577 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 14:50:28,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:28,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736262843] [2021-11-19 14:50:28,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736262843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:28,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [534252818] [2021-11-19 14:50:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:28,578 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:50:28,579 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:50:28,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 14:50:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:50:29,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:29,789 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 14:50:29,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:30,445 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 14:50:30,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [534252818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:30,445 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:30,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-19 14:50:30,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19950886] [2021-11-19 14:50:30,446 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:30,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:50:30,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:30,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:50:30,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:30,448 INFO L87 Difference]: Start difference. First operand 770 states and 959 transitions. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:50:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:30,648 INFO L93 Difference]: Finished difference Result 1397 states and 1749 transitions. [2021-11-19 14:50:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:30,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 279 [2021-11-19 14:50:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:30,655 INFO L225 Difference]: With dead ends: 1397 [2021-11-19 14:50:30,655 INFO L226 Difference]: Without dead ends: 734 [2021-11-19 14:50:30,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 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 14:50:30,658 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 275 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:30,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 1401 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-19 14:50:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2021-11-19 14:50:30,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 703 states have (on average 1.2005689900426741) internal successors, (844), 715 states have internal predecessors, (844), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 14:50:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 902 transitions. [2021-11-19 14:50:30,726 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 902 transitions. Word has length 279 [2021-11-19 14:50:30,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:30,727 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 902 transitions. [2021-11-19 14:50:30,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:50:30,727 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 902 transitions. [2021-11-19 14:50:30,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 14:50:30,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:30,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:30,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:30,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:31,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:31,137 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:31,137 INFO L85 PathProgramCache]: Analyzing trace with hash 981361769, now seen corresponding path program 1 times [2021-11-19 14:50:31,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:31,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576420117] [2021-11-19 14:50:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:31,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:31,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:31,141 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:31,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:50:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:31,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:50:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:32,562 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 14:50:32,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:33,278 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 14:50:33,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:33,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576420117] [2021-11-19 14:50:33,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576420117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:33,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [13646160] [2021-11-19 14:50:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:33,279 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:33,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:50:33,281 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:50:33,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 14:50:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:33,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:50:33,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 14:50:34,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 14:50:34,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [13646160] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:34,774 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:34,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-19 14:50:34,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681384474] [2021-11-19 14:50:34,775 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:34,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:50:34,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:34,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:50:34,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:50:34,776 INFO L87 Difference]: Start difference. First operand 734 states and 902 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:50:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:34,932 INFO L93 Difference]: Finished difference Result 913 states and 1144 transitions. [2021-11-19 14:50:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:34,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-19 14:50:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:34,939 INFO L225 Difference]: With dead ends: 913 [2021-11-19 14:50:34,939 INFO L226 Difference]: Without dead ends: 690 [2021-11-19 14:50:34,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:50:34,941 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 150 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:34,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 776 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:34,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-19 14:50:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 683. [2021-11-19 14:50:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 652 states have (on average 1.165644171779141) internal successors, (760), 664 states have internal predecessors, (760), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 14:50:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 818 transitions. [2021-11-19 14:50:34,975 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 818 transitions. Word has length 279 [2021-11-19 14:50:34,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:34,976 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 818 transitions. [2021-11-19 14:50:34,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:50:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 818 transitions. [2021-11-19 14:50:34,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 14:50:34,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:34,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:35,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:35,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-19 14:50:35,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:35,405 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:35,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1404801929, now seen corresponding path program 1 times [2021-11-19 14:50:35,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:35,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360805419] [2021-11-19 14:50:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:35,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:35,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:35,408 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:35,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:50:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:36,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:50:36,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:36,699 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 14:50:36,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:37,385 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 14:50:37,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:37,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360805419] [2021-11-19 14:50:37,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360805419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:37,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1725812785] [2021-11-19 14:50:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:37,386 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:37,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:50:37,387 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:50:37,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 14:50:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:38,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:50:38,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:39,008 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 14:50:39,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:39,765 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 14:50:39,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1725812785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:39,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334507756] [2021-11-19 14:50:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:39,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:39,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:39,768 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:50:39,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 14:50:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:40,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:50:40,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:41,280 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 14:50:41,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:42,422 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 14:50:42,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334507756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:42,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:50:42,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-19 14:50:42,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213201072] [2021-11-19 14:50:42,424 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:50:42,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:50:42,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:42,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:50:42,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:50:42,430 INFO L87 Difference]: Start difference. First operand 683 states and 818 transitions. Second operand has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:46,312 INFO L93 Difference]: Finished difference Result 2877 states and 3565 transitions. [2021-11-19 14:50:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:50:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 279 [2021-11-19 14:50:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:46,327 INFO L225 Difference]: With dead ends: 2877 [2021-11-19 14:50:46,327 INFO L226 Difference]: Without dead ends: 2241 [2021-11-19 14:50:46,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1658 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 14:50:46,333 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 2737 mSDsluCounter, 5089 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2788 SdHoareTripleChecker+Valid, 5859 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:46,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2788 Valid, 5859 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 14:50:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-11-19 14:50:46,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1887. [2021-11-19 14:50:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1818 states have (on average 1.174917491749175) internal successors, (2136), 1830 states have internal predecessors, (2136), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-19 14:50:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2283 transitions. [2021-11-19 14:50:46,436 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2283 transitions. Word has length 279 [2021-11-19 14:50:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:46,436 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 2283 transitions. [2021-11-19 14:50:46,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2283 transitions. [2021-11-19 14:50:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-19 14:50:46,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:46,448 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:46,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:46,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:46,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:47,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:47,063 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:47,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1514981865, now seen corresponding path program 2 times [2021-11-19 14:50:47,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:47,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915138346] [2021-11-19 14:50:47,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:50:47,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:47,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:47,068 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:47,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:50:48,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:50:48,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:50:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:48,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:50,467 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 14:50:50,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:52,275 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 14:50:52,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:52,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915138346] [2021-11-19 14:50:52,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915138346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:52,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2032282467] [2021-11-19 14:50:52,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:50:52,276 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:52,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:50:52,277 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:50:52,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 14:50:55,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:50:55,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:50:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:55,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:57,127 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 14:50:57,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:58,789 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 14:50:58,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2032282467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:50:58,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917651716] [2021-11-19 14:50:58,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:50:58,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:58,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:58,799 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:50:58,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 14:51:00,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:51:00,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:51:00,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:51:00,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:01,863 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 14:51:01,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:03,606 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 14:51:03,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917651716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:03,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:51:03,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-19 14:51:03,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056014348] [2021-11-19 14:51:03,608 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:51:03,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 14:51:03,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:03,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 14:51:03,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:51:03,612 INFO L87 Difference]: Start difference. First operand 1887 states and 2283 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:51:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:05,486 INFO L93 Difference]: Finished difference Result 3753 states and 4746 transitions. [2021-11-19 14:51:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 14:51:05,487 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 679 [2021-11-19 14:51:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:05,501 INFO L225 Difference]: With dead ends: 3753 [2021-11-19 14:51:05,501 INFO L226 Difference]: Without dead ends: 1907 [2021-11-19 14:51:05,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4093 GetRequests, 4050 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 14:51:05,509 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 128 mSDsluCounter, 3171 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 3468 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:05,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 3468 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:51:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-11-19 14:51:05,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1899. [2021-11-19 14:51:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1830 states have (on average 1.1759562841530056) internal successors, (2152), 1842 states have internal predecessors, (2152), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-19 14:51:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 2299 transitions. [2021-11-19 14:51:05,620 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 2299 transitions. Word has length 679 [2021-11-19 14:51:05,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:05,621 INFO L470 AbstractCegarLoop]: Abstraction has 1899 states and 2299 transitions. [2021-11-19 14:51:05,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:51:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 2299 transitions. [2021-11-19 14:51:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-19 14:51:05,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:05,634 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:05,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:05,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:06,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-19 14:51:06,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:51:06,248 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2053878807, now seen corresponding path program 3 times [2021-11-19 14:51:06,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:06,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515600051] [2021-11-19 14:51:06,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:51:06,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:06,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:06,254 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:06,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2851443b-cfcf-4b4b-addb-0280c7285c84/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process