./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.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_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/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_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/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_d24d81ff-31e3-462a-85c6-261137d85939/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 c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:01:14,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:01:14,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:01:14,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:01:14,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:01:14,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:01:14,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:01:14,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:01:14,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:01:14,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:01:14,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:01:14,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:01:14,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:01:14,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:01:14,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:01:14,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:01:14,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:01:15,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:01:15,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:01:15,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:01:15,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:01:15,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:01:15,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:01:15,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:01:15,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:01:15,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:01:15,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:01:15,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:01:15,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:01:15,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:01:15,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:01:15,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:01:15,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:01:15,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:01:15,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:01:15,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:01:15,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:01:15,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:01:15,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:01:15,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:01:15,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:01:15,040 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:01:15,096 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:01:15,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:01:15,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:01:15,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:01:15,102 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:01:15,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:01:15,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:01:15,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:01:15,103 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:01:15,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:01:15,104 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:01:15,104 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:01:15,105 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:01:15,105 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:01:15,105 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:01:15,106 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:01:15,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:01:15,107 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:01:15,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:01:15,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:01:15,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:01:15,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:01:15,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:01:15,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:01:15,108 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:01:15,109 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:01:15,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:01:15,109 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:01:15,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:01:15,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:01:15,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:01:15,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:01:15,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:01:15,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:01:15,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:01:15,113 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:01:15,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:01:15,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:01:15,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:01:15,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:01:15,114 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_d24d81ff-31e3-462a-85c6-261137d85939/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 [2021-11-19 15:01:15,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:01:15,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:01:15,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:01:15,457 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:01:15,458 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:01:15,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-19 15:01:15,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/data/df15a2829/47111f7f0920405582ebd85d8cb8dcf2/FLAGda2ee6713 [2021-11-19 15:01:16,199 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:01:16,201 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-19 15:01:16,224 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/data/df15a2829/47111f7f0920405582ebd85d8cb8dcf2/FLAGda2ee6713 [2021-11-19 15:01:16,377 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/data/df15a2829/47111f7f0920405582ebd85d8cb8dcf2 [2021-11-19 15:01:16,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:01:16,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:01:16,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:16,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:01:16,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:01:16,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:16" (1/1) ... [2021-11-19 15:01:16,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e245e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:16, skipping insertion in model container [2021-11-19 15:01:16,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:16" (1/1) ... [2021-11-19 15:01:16,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:01:16,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:01:16,898 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-19 15:01:17,036 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-19 15:01:17,041 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-19 15:01:17,058 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:17,068 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 15:01:17,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@710e50bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:17, skipping insertion in model container [2021-11-19 15:01:17,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:17,069 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:01:17,071 INFO L158 Benchmark]: Toolchain (without parser) took 688.66ms. Allocated memory is still 102.8MB. Free memory was 57.6MB in the beginning and 67.7MB in the end (delta: -10.1MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2021-11-19 15:01:17,072 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 102.8MB. Free memory was 76.4MB in the beginning and 76.4MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:01:17,073 INFO L158 Benchmark]: CACSL2BoogieTranslator took 685.54ms. Allocated memory is still 102.8MB. Free memory was 57.4MB in the beginning and 67.7MB in the end (delta: -10.3MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2021-11-19 15:01:17,075 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 102.8MB. Free memory was 76.4MB in the beginning and 76.4MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 685.54ms. Allocated memory is still 102.8MB. Free memory was 57.4MB in the beginning and 67.7MB in the end (delta: -10.3MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 716]: 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_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/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_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/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_d24d81ff-31e3-462a-85c6-261137d85939/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 c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:01:19,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:01:19,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:01:19,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:01:19,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:01:19,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:01:19,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:01:19,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:01:19,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:01:19,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:01:19,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:01:19,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:01:19,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:01:19,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:01:19,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:01:19,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:01:19,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:01:19,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:01:19,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:01:19,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:01:19,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:01:19,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:01:19,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:01:19,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:01:19,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:01:19,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:01:19,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:01:19,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:01:19,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:01:19,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:01:19,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:01:19,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:01:19,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:01:19,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:01:19,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:01:19,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:01:19,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:01:19,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:01:19,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:01:19,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:01:19,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:01:19,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:01:19,694 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:01:19,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:01:19,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:01:19,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:01:19,696 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:01:19,697 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:01:19,697 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:01:19,697 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:01:19,697 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:01:19,698 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:01:19,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:01:19,701 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:01:19,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:01:19,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:01:19,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:01:19,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:01:19,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:01:19,702 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:01:19,702 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:01:19,703 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:01:19,703 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:01:19,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:01:19,703 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:01:19,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:01:19,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:01:19,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:01:19,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:01:19,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:01:19,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:01:19,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:01:19,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:01:19,706 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:01:19,706 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:19,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:01:19,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:01:19,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:01:19,707 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_d24d81ff-31e3-462a-85c6-261137d85939/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 [2021-11-19 15:01:20,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:01:20,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:01:20,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:01:20,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:01:20,175 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:01:20,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-19 15:01:20,263 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/data/503cfc613/80738dc6de1949f989ea92db56b7645b/FLAG26f1934bc [2021-11-19 15:01:21,107 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:01:21,110 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-19 15:01:21,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/data/503cfc613/80738dc6de1949f989ea92db56b7645b/FLAG26f1934bc [2021-11-19 15:01:21,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/data/503cfc613/80738dc6de1949f989ea92db56b7645b [2021-11-19 15:01:21,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:01:21,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:01:21,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:21,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:01:21,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:01:21,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:21" (1/1) ... [2021-11-19 15:01:21,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c9a7a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:21, skipping insertion in model container [2021-11-19 15:01:21,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:21" (1/1) ... [2021-11-19 15:01:21,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:01:21,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:01:21,777 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-19 15:01:21,901 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-19 15:01:21,902 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-19 15:01:21,911 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:21,932 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:01:21,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:01:22,004 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-19 15:01:22,159 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-19 15:01:22,160 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-19 15:01:22,164 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:22,181 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:01:22,232 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-19 15:01:22,343 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-19 15:01:22,344 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_d24d81ff-31e3-462a-85c6-261137d85939/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-19 15:01:22,347 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:22,401 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:01:22,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22 WrapperNode [2021-11-19 15:01:22,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:22,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:01:22,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:01:22,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:01:22,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22" (1/1) ... [2021-11-19 15:01:22,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22" (1/1) ... [2021-11-19 15:01:22,572 INFO L137 Inliner]: procedures = 179, calls = 277, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 996 [2021-11-19 15:01:22,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:01:22,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:01:22,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:01:22,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:01:22,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22" (1/1) ... [2021-11-19 15:01:22,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22" (1/1) ... [2021-11-19 15:01:22,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22" (1/1) ... [2021-11-19 15:01:22,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22" (1/1) ... [2021-11-19 15:01:22,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22" (1/1) ... [2021-11-19 15:01:22,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22" (1/1) ... [2021-11-19 15:01:22,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22" (1/1) ... [2021-11-19 15:01:22,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:01:22,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:01:22,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:01:22,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:01:22,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22" (1/1) ... [2021-11-19 15:01:22,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:01:22,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:01:22,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:01:22,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:01:22,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 15:01:22,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 15:01:22,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 15:01:22,872 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 15:01:22,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:01:22,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:01:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 15:01:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:01:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 15:01:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 15:01:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:01:22,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 15:01:22,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:01:22,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:01:22,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:01:23,225 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:01:23,227 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:01:30,688 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:01:30,698 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:01:30,698 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-19 15:01:30,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:01:30 BoogieIcfgContainer [2021-11-19 15:01:30,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:01:30,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:01:30,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:01:30,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:01:30,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:01:21" (1/3) ... [2021-11-19 15:01:30,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cab96f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:01:30, skipping insertion in model container [2021-11-19 15:01:30,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:22" (2/3) ... [2021-11-19 15:01:30,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cab96f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:01:30, skipping insertion in model container [2021-11-19 15:01:30,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:01:30" (3/3) ... [2021-11-19 15:01:30,710 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test7-1.i [2021-11-19 15:01:30,716 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:01:30,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 15:01:30,772 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:01:30,780 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 15:01:30,780 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 15:01:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 179 states have (on average 1.6983240223463687) internal successors, (304), 181 states have internal predecessors, (304), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 15:01:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 15:01:30,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:30,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:30,812 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:30,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2094566776, now seen corresponding path program 1 times [2021-11-19 15:01:30,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:30,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956279439] [2021-11-19 15:01:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:30,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:30,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:30,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:30,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:01:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:31,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:01:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:31,195 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 15:01:31,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:31,240 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 15:01:31,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:31,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956279439] [2021-11-19 15:01:31,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956279439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:31,244 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:31,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 15:01:31,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847880989] [2021-11-19 15:01:31,254 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:31,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:01:31,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:31,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:01:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:01:31,310 INFO L87 Difference]: Start difference. First operand has 186 states, 179 states have (on average 1.6983240223463687) internal successors, (304), 181 states have internal predecessors, (304), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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 15:01:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:31,387 INFO L93 Difference]: Finished difference Result 369 states and 617 transitions. [2021-11-19 15:01:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:01:31,392 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 15:01:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:31,409 INFO L225 Difference]: With dead ends: 369 [2021-11-19 15:01:31,409 INFO L226 Difference]: Without dead ends: 181 [2021-11-19 15:01:31,415 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 15:01:31,421 INFO L933 BasicCegarLoop]: 240 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, 240 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 15:01:31,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:01:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-19 15:01:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-19 15:01:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.3142857142857143) internal successors, (230), 176 states have internal predecessors, (230), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 15:01:31,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 236 transitions. [2021-11-19 15:01:31,515 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 236 transitions. Word has length 8 [2021-11-19 15:01:31,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:31,515 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 236 transitions. [2021-11-19 15:01:31,516 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 15:01:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 236 transitions. [2021-11-19 15:01:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 15:01:31,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:31,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:31,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:31,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:31,733 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:31,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:31,734 INFO L85 PathProgramCache]: Analyzing trace with hash -716312389, now seen corresponding path program 1 times [2021-11-19 15:01:31,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:31,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057478121] [2021-11-19 15:01:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:31,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:31,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:31,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:31,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:01:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:31,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:01:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:32,021 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 15:01:32,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:32,127 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 15:01:32,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:32,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057478121] [2021-11-19 15:01:32,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057478121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:32,128 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:32,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 15:01:32,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399308618] [2021-11-19 15:01:32,128 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:32,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:01:32,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:32,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:01:32,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:01:32,131 INFO L87 Difference]: Start difference. First operand 181 states and 236 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 15:01:34,545 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:01:37,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:01:37,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:37,407 INFO L93 Difference]: Finished difference Result 468 states and 614 transitions. [2021-11-19 15:01:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:01:37,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-19 15:01:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:37,414 INFO L225 Difference]: With dead ends: 468 [2021-11-19 15:01:37,414 INFO L226 Difference]: Without dead ends: 287 [2021-11-19 15:01:37,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:01:37,418 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 140 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:37,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 623 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 15:01:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-19 15:01:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2021-11-19 15:01:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.3201438848920863) internal successors, (367), 279 states have internal predecessors, (367), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 15:01:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 373 transitions. [2021-11-19 15:01:37,447 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 373 transitions. Word has length 10 [2021-11-19 15:01:37,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:37,447 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 373 transitions. [2021-11-19 15:01:37,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 15:01:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 373 transitions. [2021-11-19 15:01:37,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 15:01:37,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:37,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:37,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 15:01:37,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:37,679 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:37,680 INFO L85 PathProgramCache]: Analyzing trace with hash -294024543, now seen corresponding path program 1 times [2021-11-19 15:01:37,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:37,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403724833] [2021-11-19 15:01:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:37,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:37,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:37,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:37,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:01:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:37,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:01:37,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:38,069 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 15:01:38,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:38,371 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 15:01:38,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:38,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403724833] [2021-11-19 15:01:38,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403724833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:38,373 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:38,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 15:01:38,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667990900] [2021-11-19 15:01:38,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:38,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:01:38,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:38,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:01:38,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:01:38,378 INFO L87 Difference]: Start difference. First operand 284 states and 373 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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 15:01:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:38,563 INFO L93 Difference]: Finished difference Result 454 states and 597 transitions. [2021-11-19 15:01:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:01:38,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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 44 [2021-11-19 15:01:38,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:38,566 INFO L225 Difference]: With dead ends: 454 [2021-11-19 15:01:38,566 INFO L226 Difference]: Without dead ends: 306 [2021-11-19 15:01:38,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:01:38,569 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 103 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:38,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 744 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:01:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-19 15:01:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 290. [2021-11-19 15:01:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 284 states have (on average 1.2570422535211268) internal successors, (357), 285 states have internal predecessors, (357), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 15:01:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 363 transitions. [2021-11-19 15:01:38,596 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 363 transitions. Word has length 44 [2021-11-19 15:01:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:38,596 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 363 transitions. [2021-11-19 15:01:38,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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 15:01:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 363 transitions. [2021-11-19 15:01:38,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 15:01:38,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:38,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:38,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:38,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:38,821 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:38,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1193467565, now seen corresponding path program 1 times [2021-11-19 15:01:38,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:38,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541045491] [2021-11-19 15:01:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:38,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:38,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:38,824 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:38,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:01:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:39,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:01:39,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:39,227 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 15:01:39,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:39,695 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 15:01:39,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:39,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541045491] [2021-11-19 15:01:39,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541045491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:39,696 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:39,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-19 15:01:39,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112003958] [2021-11-19 15:01:39,697 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:39,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:01:39,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:39,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:01:39,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:01:39,699 INFO L87 Difference]: Start difference. First operand 290 states and 363 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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 15:01:39,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:39,846 INFO L93 Difference]: Finished difference Result 446 states and 551 transitions. [2021-11-19 15:01:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:01:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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 44 [2021-11-19 15:01:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:39,849 INFO L225 Difference]: With dead ends: 446 [2021-11-19 15:01:39,850 INFO L226 Difference]: Without dead ends: 292 [2021-11-19 15:01:39,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:01:39,852 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 87 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:39,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 868 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:01:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-19 15:01:39,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 278. [2021-11-19 15:01:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 272 states have (on average 1.2389705882352942) internal successors, (337), 273 states have internal predecessors, (337), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 15:01:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 343 transitions. [2021-11-19 15:01:39,871 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 343 transitions. Word has length 44 [2021-11-19 15:01:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:39,871 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 343 transitions. [2021-11-19 15:01:39,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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 15:01:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 343 transitions. [2021-11-19 15:01:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 15:01:39,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:39,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:39,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-19 15:01:40,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:40,092 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash -440515753, now seen corresponding path program 1 times [2021-11-19 15:01:40,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:40,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212014430] [2021-11-19 15:01:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:40,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:40,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:40,095 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:40,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:01:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:40,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:01:40,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:40,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:01:40,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:01:40,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:01:40,491 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 15:01:40,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 15:01:40,578 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 15:01:40,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-19 15:01:40,715 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 15:01:40,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:40,916 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 15:01:40,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:40,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212014430] [2021-11-19 15:01:40,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212014430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:40,917 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:40,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:01:40,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847594419] [2021-11-19 15:01:40,917 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:40,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:01:40,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:40,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:01:40,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:01:40,921 INFO L87 Difference]: Start difference. First operand 278 states and 343 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 15:01:46,282 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:01:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:52,193 INFO L93 Difference]: Finished difference Result 561 states and 672 transitions. [2021-11-19 15:01:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:01:52,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 44 [2021-11-19 15:01:52,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:52,198 INFO L225 Difference]: With dead ends: 561 [2021-11-19 15:01:52,198 INFO L226 Difference]: Without dead ends: 418 [2021-11-19 15:01:52,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:01:52,200 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 187 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:52,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 908 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2021-11-19 15:01:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-19 15:01:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 277. [2021-11-19 15:01:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 271 states have (on average 1.2361623616236161) internal successors, (335), 272 states have internal predecessors, (335), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 15:01:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 341 transitions. [2021-11-19 15:01:52,221 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 341 transitions. Word has length 44 [2021-11-19 15:01:52,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:52,221 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 341 transitions. [2021-11-19 15:01:52,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 15:01:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 341 transitions. [2021-11-19 15:01:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 15:01:52,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:52,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:52,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 15:01:52,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:52,450 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:52,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1692574547, now seen corresponding path program 1 times [2021-11-19 15:01:52,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:52,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069514003] [2021-11-19 15:01:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:52,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:52,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:52,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:52,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:01:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:52,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:01:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:01:53,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:01:53,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:53,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069514003] [2021-11-19 15:01:53,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069514003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:53,276 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:53,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 15:01:53,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346573580] [2021-11-19 15:01:53,276 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:53,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:01:53,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:53,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:01:53,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:01:53,278 INFO L87 Difference]: Start difference. First operand 277 states and 341 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:01:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:53,473 INFO L93 Difference]: Finished difference Result 553 states and 687 transitions. [2021-11-19 15:01:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:01:53,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 77 [2021-11-19 15:01:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:53,478 INFO L225 Difference]: With dead ends: 553 [2021-11-19 15:01:53,478 INFO L226 Difference]: Without dead ends: 285 [2021-11-19 15:01:53,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 149 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 15:01:53,483 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 196 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 415 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 15:01:53,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 415 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:01:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-19 15:01:53,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2021-11-19 15:01:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 277 states have (on average 1.1732851985559567) internal successors, (325), 278 states have internal predecessors, (325), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 15:01:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 331 transitions. [2021-11-19 15:01:53,511 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 331 transitions. Word has length 77 [2021-11-19 15:01:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:53,514 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 331 transitions. [2021-11-19 15:01:53,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:01:53,515 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 331 transitions. [2021-11-19 15:01:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 15:01:53,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:53,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:53,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:53,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:53,746 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:53,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:53,747 INFO L85 PathProgramCache]: Analyzing trace with hash -681144927, now seen corresponding path program 1 times [2021-11-19 15:01:53,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:53,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465737892] [2021-11-19 15:01:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:53,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:53,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:53,759 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:53,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:01:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:54,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:01:54,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:01:54,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:01:54,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:54,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465737892] [2021-11-19 15:01:54,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465737892] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:01:54,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:01:54,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 15:01:54,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214474881] [2021-11-19 15:01:54,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:54,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:01:54,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:01:54,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:01:54,584 INFO L87 Difference]: Start difference. First operand 283 states and 331 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 15:01:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:54,652 INFO L93 Difference]: Finished difference Result 524 states and 619 transitions. [2021-11-19 15:01:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:01:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 77 [2021-11-19 15:01:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:54,658 INFO L225 Difference]: With dead ends: 524 [2021-11-19 15:01:54,658 INFO L226 Difference]: Without dead ends: 286 [2021-11-19 15:01:54,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:01:54,661 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 2 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:54,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 617 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:01:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-19 15:01:54,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2021-11-19 15:01:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 279 states have (on average 1.1756272401433692) internal successors, (328), 281 states have internal predecessors, (328), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 15:01:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 335 transitions. [2021-11-19 15:01:54,692 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 335 transitions. Word has length 77 [2021-11-19 15:01:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:54,693 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 335 transitions. [2021-11-19 15:01:54,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 15:01:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 335 transitions. [2021-11-19 15:01:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 15:01:54,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:54,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:54,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:54,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:54,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:54,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1427472577, now seen corresponding path program 1 times [2021-11-19 15:01:54,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:54,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868810007] [2021-11-19 15:01:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:54,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:54,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:54,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:54,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:01:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:55,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:01:55,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:01:55,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:01:55,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:55,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868810007] [2021-11-19 15:01:55,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868810007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:55,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262512353] [2021-11-19 15:01:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:55,782 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:55,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:01:55,785 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:01:55,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 15:01:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:56,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:01:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:01:56,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:01:56,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [262512353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:56,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542647359] [2021-11-19 15:01:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:56,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:01:56,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:01:56,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:01:56,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 15:01:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:56,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:01:56,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:57,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:01:57,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:01:57,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:01:57,159 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 15:01:57,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 15:01:57,259 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 15:01:57,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-19 15:01:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:01:57,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:01:57,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542647359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:57,542 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 15:01:57,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-19 15:01:57,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100493650] [2021-11-19 15:01:57,542 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:57,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:01:57,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:57,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:01:57,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:01:57,543 INFO L87 Difference]: Start difference. First operand 286 states and 335 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 15:02:02,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:02:06,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:02:06,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:06,561 INFO L93 Difference]: Finished difference Result 427 states and 498 transitions. [2021-11-19 15:02:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:02:06,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 79 [2021-11-19 15:02:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:06,566 INFO L225 Difference]: With dead ends: 427 [2021-11-19 15:02:06,567 INFO L226 Difference]: Without dead ends: 423 [2021-11-19 15:02:06,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:02:06,568 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 287 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:06,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 782 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2021-11-19 15:02:06,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-19 15:02:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 288. [2021-11-19 15:02:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 281 states have (on average 1.1743772241992882) internal successors, (330), 283 states have internal predecessors, (330), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 15:02:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 337 transitions. [2021-11-19 15:02:06,588 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 337 transitions. Word has length 79 [2021-11-19 15:02:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:06,588 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 337 transitions. [2021-11-19 15:02:06,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 15:02:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 337 transitions. [2021-11-19 15:02:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:02:06,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:06,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:06,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:06,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-19 15:02:07,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:07,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:02:07,208 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:07,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1770376997, now seen corresponding path program 1 times [2021-11-19 15:02:07,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:07,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506080827] [2021-11-19 15:02:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:07,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:07,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:07,210 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:07,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:02:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:02:07,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:02:07,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:02:08,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:08,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506080827] [2021-11-19 15:02:08,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506080827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:08,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1514478416] [2021-11-19 15:02:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:08,161 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:08,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:08,162 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:08,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 15:02:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:08,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:02:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:02:08,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:02:09,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1514478416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:09,298 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:09,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-19 15:02:09,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743158547] [2021-11-19 15:02:09,299 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:09,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:02:09,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:09,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:02:09,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:02:09,301 INFO L87 Difference]: Start difference. First operand 288 states and 337 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 15:02:12,066 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:02:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:13,566 INFO L93 Difference]: Finished difference Result 613 states and 722 transitions. [2021-11-19 15:02:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:02:13,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 113 [2021-11-19 15:02:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:13,573 INFO L225 Difference]: With dead ends: 613 [2021-11-19 15:02:13,573 INFO L226 Difference]: Without dead ends: 370 [2021-11-19 15:02:13,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:02:13,575 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 379 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:13,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 343 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-19 15:02:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-19 15:02:13,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 363. [2021-11-19 15:02:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 356 states have (on average 1.1797752808988764) internal successors, (420), 358 states have internal predecessors, (420), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 15:02:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 427 transitions. [2021-11-19 15:02:13,597 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 427 transitions. Word has length 113 [2021-11-19 15:02:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:13,598 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 427 transitions. [2021-11-19 15:02:13,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 15:02:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 427 transitions. [2021-11-19 15:02:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 15:02:13,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:13,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:13,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:13,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:14,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:02:14,004 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:14,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2065893013, now seen corresponding path program 1 times [2021-11-19 15:02:14,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:14,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121276400] [2021-11-19 15:02:14,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:14,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:14,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:14,007 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:14,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:02:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:14,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:02:14,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:02:14,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:02:14,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:14,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121276400] [2021-11-19 15:02:14,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121276400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:14,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1126434072] [2021-11-19 15:02:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:14,960 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:14,961 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:14,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 15:02:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:15,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:02:15,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:02:15,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:02:15,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1126434072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:15,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938745246] [2021-11-19 15:02:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:15,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:02:15,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:02:15,986 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:02:15,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 15:02:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:16,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:02:16,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:02:16,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:02:16,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938745246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:16,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:02:16,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-19 15:02:16,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806393867] [2021-11-19 15:02:16,845 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:02:16,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:02:16,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:16,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:02:16,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:02:16,847 INFO L87 Difference]: Start difference. First operand 363 states and 427 transitions. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:02:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:17,338 INFO L93 Difference]: Finished difference Result 693 states and 827 transitions. [2021-11-19 15:02:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 15:02:17,340 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 120 [2021-11-19 15:02:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:17,343 INFO L225 Difference]: With dead ends: 693 [2021-11-19 15:02:17,343 INFO L226 Difference]: Without dead ends: 378 [2021-11-19 15:02:17,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:02:17,346 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 45 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:17,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1220 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:02:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-19 15:02:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 374. [2021-11-19 15:02:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 366 states have (on average 1.1967213114754098) internal successors, (438), 368 states have internal predecessors, (438), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 15:02:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 445 transitions. [2021-11-19 15:02:17,373 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 445 transitions. Word has length 120 [2021-11-19 15:02:17,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:17,373 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 445 transitions. [2021-11-19 15:02:17,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:02:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 445 transitions. [2021-11-19 15:02:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 15:02:17,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:17,376 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:17,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:17,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:17,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-19 15:02:17,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:17,998 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1133250829, now seen corresponding path program 2 times [2021-11-19 15:02:18,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:18,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248146312] [2021-11-19 15:02:18,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:02:18,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:18,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:18,001 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:18,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:02:18,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:02:18,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:02:18,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:02:18,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:02:18,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:02:19,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:19,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248146312] [2021-11-19 15:02:19,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248146312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:19,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1198572774] [2021-11-19 15:02:19,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:02:19,360 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:19,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:19,361 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:19,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 15:02:20,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:02:20,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:02:20,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:02:20,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:02:20,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:02:20,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1198572774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:20,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360105685] [2021-11-19 15:02:20,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:02:20,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:02:20,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:02:20,669 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:02:20,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 15:02:21,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:02:21,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:02:21,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:02:21,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 15:02:21,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:02:22,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360105685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:22,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:02:22,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-19 15:02:22,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755335147] [2021-11-19 15:02:22,107 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:02:22,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 15:02:22,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 15:02:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:02:22,109 INFO L87 Difference]: Start difference. First operand 374 states and 445 transitions. Second operand has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 15:02:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:23,528 INFO L93 Difference]: Finished difference Result 711 states and 852 transitions. [2021-11-19 15:02:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 15:02:23,530 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2021-11-19 15:02:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:23,533 INFO L225 Difference]: With dead ends: 711 [2021-11-19 15:02:23,533 INFO L226 Difference]: Without dead ends: 387 [2021-11-19 15:02:23,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 15:02:23,536 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 69 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:23,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1458 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:02:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-19 15:02:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 381. [2021-11-19 15:02:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 373 states have (on average 1.193029490616622) internal successors, (445), 375 states have internal predecessors, (445), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 15:02:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 452 transitions. [2021-11-19 15:02:23,562 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 452 transitions. Word has length 126 [2021-11-19 15:02:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:23,562 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 452 transitions. [2021-11-19 15:02:23,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 15:02:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 452 transitions. [2021-11-19 15:02:23,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 15:02:23,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:23,565 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:23,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-19 15:02:23,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:23,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:24,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:02:24,171 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash 713499125, now seen corresponding path program 3 times [2021-11-19 15:02:24,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:24,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933874905] [2021-11-19 15:02:24,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:02:24,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:24,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:24,174 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:24,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:02:28,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 15:02:28,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:02:28,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:02:28,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 15:02:28,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 15:02:29,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:29,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933874905] [2021-11-19 15:02:29,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933874905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:29,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [89173107] [2021-11-19 15:02:29,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:02:29,626 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:29,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:29,627 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:29,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 15:03:17,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 15:03:17,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:03:17,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:03:17,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 15:03:17,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 15:03:18,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [89173107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:18,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632873451] [2021-11-19 15:03:18,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:03:18,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:03:18,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:03:18,383 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:03:18,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24d81ff-31e3-462a-85c6-261137d85939/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process