./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8 --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 1c4d0e54eab5e94cf1a4af64165a2546f1c45e063bd8600195a743522777000c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:10,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:10,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:11,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:11,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:11,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:11,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:11,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:11,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:11,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:11,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:11,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:11,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:11,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:11,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:11,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:11,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:11,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:11,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:11,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:11,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:11,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:11,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:11,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:11,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:11,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:11,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:11,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:11,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:11,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:11,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:11,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:11,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:11,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:11,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:11,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:11,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:11,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:11,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:11,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:11,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:11,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:06:11,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:11,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:11,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:11,154 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:11,155 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:11,155 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:11,155 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:06:11,155 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:11,162 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:11,162 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:06:11,163 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:06:11,164 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:11,164 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:06:11,164 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:06:11,164 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:06:11,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:11,165 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:06:11,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:06:11,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:06:11,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:11,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:11,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:11,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:11,167 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:11,167 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:06:11,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:11,167 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:11,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:11,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:11,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:11,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:11,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:11,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:11,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:11,169 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:06:11,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:06:11,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:11,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:11,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:11,170 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c4d0e54eab5e94cf1a4af64165a2546f1c45e063bd8600195a743522777000c [2021-11-07 02:06:11,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:11,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:11,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:11,457 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:11,458 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:11,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product27.cil.c [2021-11-07 02:06:11,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/data/64e4d84f6/30e8e41ed20f4eb7b1b4de058d82d07f/FLAG2bf731ead [2021-11-07 02:06:12,205 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:12,206 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/sv-benchmarks/c/product-lines/email_spec3_product27.cil.c [2021-11-07 02:06:12,235 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/data/64e4d84f6/30e8e41ed20f4eb7b1b4de058d82d07f/FLAG2bf731ead [2021-11-07 02:06:12,414 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/data/64e4d84f6/30e8e41ed20f4eb7b1b4de058d82d07f [2021-11-07 02:06:12,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:12,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:12,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:12,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:12,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:12,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:12" (1/1) ... [2021-11-07 02:06:12,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d82ae94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:12, skipping insertion in model container [2021-11-07 02:06:12,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:12" (1/1) ... [2021-11-07 02:06:12,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:12,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:13,061 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/sv-benchmarks/c/product-lines/email_spec3_product27.cil.c[40661,40674] [2021-11-07 02:06:13,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:13,133 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) [2021-11-07 02:06:13,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@439c74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:13, skipping insertion in model container [2021-11-07 02:06:13,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:13,135 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:06:13,137 INFO L168 Benchmark]: Toolchain (without parser) took 717.90 ms. Allocated memory is still 113.2 MB. Free memory was 75.0 MB in the beginning and 74.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:13,138 INFO L168 Benchmark]: CDTParser took 7.03 ms. Allocated memory is still 113.2 MB. Free memory was 82.8 MB in the beginning and 93.9 MB in the end (delta: -11.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:13,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 711.42 ms. Allocated memory is still 113.2 MB. Free memory was 74.8 MB in the beginning and 74.0 MB in the end (delta: 859.4 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:13,141 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 7.03 ms. Allocated memory is still 113.2 MB. Free memory was 82.8 MB in the beginning and 93.9 MB in the end (delta: -11.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 711.42 ms. Allocated memory is still 113.2 MB. Free memory was 74.8 MB in the beginning and 74.0 MB in the end (delta: 859.4 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 213]: 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_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8 --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 1c4d0e54eab5e94cf1a4af64165a2546f1c45e063bd8600195a743522777000c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:15,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:15,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:15,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:15,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:15,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:15,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:15,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:15,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:15,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:15,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:15,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:15,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:15,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:15,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:15,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:15,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:15,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:15,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:15,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:15,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:15,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:15,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:15,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:15,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:15,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:15,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:15,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:15,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:15,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:15,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:15,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:15,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:15,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:15,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:15,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:15,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:15,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:15,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:15,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:15,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:15,733 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:06:15,781 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:15,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:15,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:15,783 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:15,783 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:15,784 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:15,784 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:15,784 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:15,784 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:15,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:15,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:06:15,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:06:15,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:15,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:15,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:15,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:15,789 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:15,789 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:06:15,789 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:06:15,789 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:06:15,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:15,790 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:15,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:15,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:15,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:06:15,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:15,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:15,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:15,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:15,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:15,792 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:06:15,792 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:15,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:15,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:15,794 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:15,794 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_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c4d0e54eab5e94cf1a4af64165a2546f1c45e063bd8600195a743522777000c [2021-11-07 02:06:16,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:16,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:16,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:16,233 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:16,234 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:16,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product27.cil.c [2021-11-07 02:06:16,305 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/data/902f0d936/94742efdfecb4d11ba4932d68826a54e/FLAGc29d91909 [2021-11-07 02:06:17,002 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:17,003 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/sv-benchmarks/c/product-lines/email_spec3_product27.cil.c [2021-11-07 02:06:17,033 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/data/902f0d936/94742efdfecb4d11ba4932d68826a54e/FLAGc29d91909 [2021-11-07 02:06:17,154 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/data/902f0d936/94742efdfecb4d11ba4932d68826a54e [2021-11-07 02:06:17,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:17,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:17,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:17,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:17,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:17,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:17" (1/1) ... [2021-11-07 02:06:17,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2e9670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:17, skipping insertion in model container [2021-11-07 02:06:17,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:17" (1/1) ... [2021-11-07 02:06:17,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:17,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:17,914 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/sv-benchmarks/c/product-lines/email_spec3_product27.cil.c[40661,40674] [2021-11-07 02:06:17,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:18,005 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:06:18,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:18,084 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/sv-benchmarks/c/product-lines/email_spec3_product27.cil.c[40661,40674] [2021-11-07 02:06:18,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:18,130 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:06:18,201 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/sv-benchmarks/c/product-lines/email_spec3_product27.cil.c[40661,40674] [2021-11-07 02:06:18,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:18,280 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:06:18,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18 WrapperNode [2021-11-07 02:06:18,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:18,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:18,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:06:18,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:06:18,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18" (1/1) ... [2021-11-07 02:06:18,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18" (1/1) ... [2021-11-07 02:06:18,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:18,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:06:18,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:06:18,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:06:18,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18" (1/1) ... [2021-11-07 02:06:18,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18" (1/1) ... [2021-11-07 02:06:18,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18" (1/1) ... [2021-11-07 02:06:18,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18" (1/1) ... [2021-11-07 02:06:18,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18" (1/1) ... [2021-11-07 02:06:18,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18" (1/1) ... [2021-11-07 02:06:18,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18" (1/1) ... [2021-11-07 02:06:18,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:06:18,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:06:18,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:06:18,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:06:18,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18" (1/1) ... [2021-11-07 02:06:18,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:18,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:18,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:06:18,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:06:18,758 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:06:18,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:06:18,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:06:18,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:06:18,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:06:25,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:06:25,007 INFO L299 CfgBuilder]: Removed 757 assume(true) statements. [2021-11-07 02:06:25,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:06:25 BoogieIcfgContainer [2021-11-07 02:06:25,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:06:25,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:06:25,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:06:25,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:06:25,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:06:17" (1/3) ... [2021-11-07 02:06:25,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff55da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:06:25, skipping insertion in model container [2021-11-07 02:06:25,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:18" (2/3) ... [2021-11-07 02:06:25,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff55da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:06:25, skipping insertion in model container [2021-11-07 02:06:25,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:06:25" (3/3) ... [2021-11-07 02:06:25,050 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product27.cil.c [2021-11-07 02:06:25,056 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:06:25,056 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-07 02:06:25,127 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:06:25,136 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 [2021-11-07 02:06:25,136 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-07 02:06:25,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 1102 states, 1089 states have (on average 1.7327823691460056) internal successors, (1887), 1101 states have internal predecessors, (1887), 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) [2021-11-07 02:06:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:06:25,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:25,215 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:25,216 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1048437424, now seen corresponding path program 1 times [2021-11-07 02:06:25,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:25,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857664796] [2021-11-07 02:06:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:25,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:25,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:25,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:25,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:06:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:25,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:06:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:25,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:26,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:26,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857664796] [2021-11-07 02:06:26,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857664796] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:26,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:26,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:06:26,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574702879] [2021-11-07 02:06:26,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:06:26,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:26,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:06:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:06:26,166 INFO L87 Difference]: Start difference. First operand has 1102 states, 1089 states have (on average 1.7327823691460056) internal successors, (1887), 1101 states have internal predecessors, (1887), 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) Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 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) [2021-11-07 02:06:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:26,345 INFO L93 Difference]: Finished difference Result 1915 states and 3244 transitions. [2021-11-07 02:06:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:06:26,347 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 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 49 [2021-11-07 02:06:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:26,371 INFO L225 Difference]: With dead ends: 1915 [2021-11-07 02:06:26,372 INFO L226 Difference]: Without dead ends: 948 [2021-11-07 02:06:26,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:06:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-11-07 02:06:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 948. [2021-11-07 02:06:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 936 states have (on average 1.7264957264957266) internal successors, (1616), 947 states have internal predecessors, (1616), 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) [2021-11-07 02:06:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1616 transitions. [2021-11-07 02:06:26,534 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1616 transitions. Word has length 49 [2021-11-07 02:06:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:26,535 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1616 transitions. [2021-11-07 02:06:26,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 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) [2021-11-07 02:06:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1616 transitions. [2021-11-07 02:06:26,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:06:26,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:26,545 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:26,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:26,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:26,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:26,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1864635995, now seen corresponding path program 1 times [2021-11-07 02:06:26,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:26,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264515515] [2021-11-07 02:06:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:26,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:26,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:26,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:26,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:06:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:27,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:06:27,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:27,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:27,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:27,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264515515] [2021-11-07 02:06:27,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264515515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:27,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:27,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:06:27,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809589430] [2021-11-07 02:06:27,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:27,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:27,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:27,577 INFO L87 Difference]: Start difference. First operand 948 states and 1616 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-07 02:06:27,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:27,732 INFO L93 Difference]: Finished difference Result 2814 states and 4800 transitions. [2021-11-07 02:06:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:27,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 50 [2021-11-07 02:06:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:27,746 INFO L225 Difference]: With dead ends: 2814 [2021-11-07 02:06:27,746 INFO L226 Difference]: Without dead ends: 1881 [2021-11-07 02:06:27,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:27,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-11-07 02:06:27,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 947. [2021-11-07 02:06:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 935 states have (on average 1.722994652406417) internal successors, (1611), 946 states have internal predecessors, (1611), 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) [2021-11-07 02:06:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1611 transitions. [2021-11-07 02:06:27,800 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1611 transitions. Word has length 50 [2021-11-07 02:06:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:27,800 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 1611 transitions. [2021-11-07 02:06:27,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-07 02:06:27,801 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1611 transitions. [2021-11-07 02:06:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:06:27,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:27,803 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:27,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:28,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:28,020 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1621471999, now seen corresponding path program 1 times [2021-11-07 02:06:28,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:28,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153474688] [2021-11-07 02:06:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:28,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:28,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:28,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:28,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:06:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:28,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:06:28,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:28,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:28,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:28,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153474688] [2021-11-07 02:06:28,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153474688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:28,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:28,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:06:28,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210753466] [2021-11-07 02:06:28,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:28,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:28,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:28,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:06:28,816 INFO L87 Difference]: Start difference. First operand 947 states and 1611 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2021-11-07 02:06:29,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:29,249 INFO L93 Difference]: Finished difference Result 3705 states and 6306 transitions. [2021-11-07 02:06:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:06:29,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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 52 [2021-11-07 02:06:29,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:29,268 INFO L225 Difference]: With dead ends: 3705 [2021-11-07 02:06:29,268 INFO L226 Difference]: Without dead ends: 2776 [2021-11-07 02:06:29,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:06:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-11-07 02:06:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 946. [2021-11-07 02:06:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 934 states have (on average 1.720556745182013) internal successors, (1607), 945 states have internal predecessors, (1607), 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) [2021-11-07 02:06:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1607 transitions. [2021-11-07 02:06:29,370 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1607 transitions. Word has length 52 [2021-11-07 02:06:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:29,371 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 1607 transitions. [2021-11-07 02:06:29,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2021-11-07 02:06:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1607 transitions. [2021-11-07 02:06:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:06:29,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:29,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:29,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 02:06:29,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:29,589 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:29,589 INFO L85 PathProgramCache]: Analyzing trace with hash 330330572, now seen corresponding path program 1 times [2021-11-07 02:06:29,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:29,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434676442] [2021-11-07 02:06:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:29,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:29,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:29,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:29,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:06:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:30,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:06:30,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:30,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:30,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:30,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434676442] [2021-11-07 02:06:30,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434676442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:30,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:30,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:06:30,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274505413] [2021-11-07 02:06:30,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:30,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:30,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:30,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:30,410 INFO L87 Difference]: Start difference. First operand 946 states and 1607 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-07 02:06:30,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:30,517 INFO L93 Difference]: Finished difference Result 1889 states and 3211 transitions. [2021-11-07 02:06:30,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:30,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 53 [2021-11-07 02:06:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:30,542 INFO L225 Difference]: With dead ends: 1889 [2021-11-07 02:06:30,543 INFO L226 Difference]: Without dead ends: 951 [2021-11-07 02:06:30,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-11-07 02:06:30,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 946. [2021-11-07 02:06:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 934 states have (on average 1.7173447537473234) internal successors, (1604), 945 states have internal predecessors, (1604), 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) [2021-11-07 02:06:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1604 transitions. [2021-11-07 02:06:30,614 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1604 transitions. Word has length 53 [2021-11-07 02:06:30,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:30,614 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 1604 transitions. [2021-11-07 02:06:30,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-07 02:06:30,615 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1604 transitions. [2021-11-07 02:06:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:06:30,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:30,617 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:30,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:30,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:30,832 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:30,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:30,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1662020329, now seen corresponding path program 1 times [2021-11-07 02:06:30,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:30,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255130604] [2021-11-07 02:06:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:30,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:30,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:30,835 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:30,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:06:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:31,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:06:31,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:31,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:31,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:31,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255130604] [2021-11-07 02:06:31,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255130604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:31,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:31,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:06:31,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503209642] [2021-11-07 02:06:31,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:31,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:06:31,596 INFO L87 Difference]: Start difference. First operand 946 states and 1604 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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) [2021-11-07 02:06:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:32,008 INFO L93 Difference]: Finished difference Result 3692 states and 6282 transitions. [2021-11-07 02:06:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:06:32,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 54 [2021-11-07 02:06:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:32,027 INFO L225 Difference]: With dead ends: 3692 [2021-11-07 02:06:32,027 INFO L226 Difference]: Without dead ends: 2772 [2021-11-07 02:06:32,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:06:32,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2021-11-07 02:06:32,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 946. [2021-11-07 02:06:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 934 states have (on average 1.714132762312634) internal successors, (1601), 945 states have internal predecessors, (1601), 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) [2021-11-07 02:06:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1601 transitions. [2021-11-07 02:06:32,163 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1601 transitions. Word has length 54 [2021-11-07 02:06:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:32,163 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 1601 transitions. [2021-11-07 02:06:32,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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) [2021-11-07 02:06:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1601 transitions. [2021-11-07 02:06:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:06:32,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:32,166 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:32,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:32,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:32,385 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:32,386 INFO L85 PathProgramCache]: Analyzing trace with hash -871980164, now seen corresponding path program 1 times [2021-11-07 02:06:32,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:32,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427451556] [2021-11-07 02:06:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:32,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:32,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:32,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:32,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:06:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:32,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:32,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:33,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:33,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:33,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427451556] [2021-11-07 02:06:33,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427451556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:33,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:33,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:06:33,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087677192] [2021-11-07 02:06:33,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:33,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:33,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:33,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:33,209 INFO L87 Difference]: Start difference. First operand 946 states and 1601 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-07 02:06:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:33,406 INFO L93 Difference]: Finished difference Result 2525 states and 4261 transitions. [2021-11-07 02:06:33,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 56 [2021-11-07 02:06:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:33,418 INFO L225 Difference]: With dead ends: 2525 [2021-11-07 02:06:33,419 INFO L226 Difference]: Without dead ends: 1866 [2021-11-07 02:06:33,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-11-07 02:06:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1207. [2021-11-07 02:06:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1195 states have (on average 1.7414225941422594) internal successors, (2081), 1206 states have internal predecessors, (2081), 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) [2021-11-07 02:06:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2081 transitions. [2021-11-07 02:06:33,526 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2081 transitions. Word has length 56 [2021-11-07 02:06:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:33,527 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 2081 transitions. [2021-11-07 02:06:33,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-07 02:06:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2081 transitions. [2021-11-07 02:06:33,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:06:33,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:33,530 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:33,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:33,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:33,747 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:33,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:33,748 INFO L85 PathProgramCache]: Analyzing trace with hash 284384107, now seen corresponding path program 1 times [2021-11-07 02:06:33,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:33,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593131630] [2021-11-07 02:06:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:33,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:33,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:33,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:33,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:06:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:34,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:34,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:34,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:34,585 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:34,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593131630] [2021-11-07 02:06:34,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593131630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:34,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:34,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:06:34,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166806299] [2021-11-07 02:06:34,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:34,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:34,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:34,587 INFO L87 Difference]: Start difference. First operand 1207 states and 2081 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-07 02:06:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:34,759 INFO L93 Difference]: Finished difference Result 3198 states and 5502 transitions. [2021-11-07 02:06:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-11-07 02:06:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:34,773 INFO L225 Difference]: With dead ends: 3198 [2021-11-07 02:06:34,773 INFO L226 Difference]: Without dead ends: 2075 [2021-11-07 02:06:34,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-11-07 02:06:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1416. [2021-11-07 02:06:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1404 states have (on average 1.754985754985755) internal successors, (2464), 1415 states have internal predecessors, (2464), 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) [2021-11-07 02:06:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2464 transitions. [2021-11-07 02:06:34,895 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2464 transitions. Word has length 68 [2021-11-07 02:06:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:34,897 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2464 transitions. [2021-11-07 02:06:34,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-07 02:06:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2464 transitions. [2021-11-07 02:06:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:06:34,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:34,901 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:34,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:35,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:35,117 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:35,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1515246316, now seen corresponding path program 1 times [2021-11-07 02:06:35,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:35,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642479904] [2021-11-07 02:06:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:35,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:35,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:35,120 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:35,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:06:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:35,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:35,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:35,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:35,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642479904] [2021-11-07 02:06:35,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642479904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:35,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:35,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:06:35,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306261113] [2021-11-07 02:06:35,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:35,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:35,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:35,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:35,997 INFO L87 Difference]: Start difference. First operand 1416 states and 2464 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-07 02:06:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:36,174 INFO L93 Difference]: Finished difference Result 3857 states and 6716 transitions. [2021-11-07 02:06:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:36,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2021-11-07 02:06:36,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:36,190 INFO L225 Difference]: With dead ends: 3857 [2021-11-07 02:06:36,190 INFO L226 Difference]: Without dead ends: 2533 [2021-11-07 02:06:36,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-11-07 02:06:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1874. [2021-11-07 02:06:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1862 states have (on average 1.7755102040816326) internal successors, (3306), 1873 states have internal predecessors, (3306), 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) [2021-11-07 02:06:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 3306 transitions. [2021-11-07 02:06:36,352 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 3306 transitions. Word has length 69 [2021-11-07 02:06:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:36,353 INFO L470 AbstractCegarLoop]: Abstraction has 1874 states and 3306 transitions. [2021-11-07 02:06:36,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-07 02:06:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 3306 transitions. [2021-11-07 02:06:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:06:36,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:36,357 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:36,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:36,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:36,571 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:36,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:36,572 INFO L85 PathProgramCache]: Analyzing trace with hash 968170493, now seen corresponding path program 1 times [2021-11-07 02:06:36,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:36,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963012395] [2021-11-07 02:06:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:36,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:36,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:36,574 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:36,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:06:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:37,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:37,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:37,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:37,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963012395] [2021-11-07 02:06:37,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963012395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:37,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:37,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:06:37,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876083769] [2021-11-07 02:06:37,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:37,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:37,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:37,509 INFO L87 Difference]: Start difference. First operand 1874 states and 3306 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-07 02:06:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:37,785 INFO L93 Difference]: Finished difference Result 5211 states and 9211 transitions. [2021-11-07 02:06:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:37,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2021-11-07 02:06:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:37,824 INFO L225 Difference]: With dead ends: 5211 [2021-11-07 02:06:37,825 INFO L226 Difference]: Without dead ends: 3437 [2021-11-07 02:06:37,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2021-11-07 02:06:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 2778. [2021-11-07 02:06:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2766 states have (on average 1.7964569775849601) internal successors, (4969), 2777 states have internal predecessors, (4969), 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) [2021-11-07 02:06:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 4969 transitions. [2021-11-07 02:06:38,042 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 4969 transitions. Word has length 70 [2021-11-07 02:06:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:38,042 INFO L470 AbstractCegarLoop]: Abstraction has 2778 states and 4969 transitions. [2021-11-07 02:06:38,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-07 02:06:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 4969 transitions. [2021-11-07 02:06:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:06:38,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:38,055 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:38,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:38,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:38,272 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash 579677821, now seen corresponding path program 1 times [2021-11-07 02:06:38,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:38,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642766731] [2021-11-07 02:06:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:38,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:38,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:38,275 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:38,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:06:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:38,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:38,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:38,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:39,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:39,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642766731] [2021-11-07 02:06:39,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642766731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:39,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:39,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:06:39,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370319506] [2021-11-07 02:06:39,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:39,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:39,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:39,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:39,169 INFO L87 Difference]: Start difference. First operand 2778 states and 4969 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-07 02:06:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:39,483 INFO L93 Difference]: Finished difference Result 7659 states and 13719 transitions. [2021-11-07 02:06:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:39,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2021-11-07 02:06:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:39,531 INFO L225 Difference]: With dead ends: 7659 [2021-11-07 02:06:39,531 INFO L226 Difference]: Without dead ends: 5015 [2021-11-07 02:06:39,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5015 states. [2021-11-07 02:06:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5015 to 4356. [2021-11-07 02:06:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4344 states have (on average 1.811694290976059) internal successors, (7870), 4355 states have internal predecessors, (7870), 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) [2021-11-07 02:06:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 7870 transitions. [2021-11-07 02:06:39,808 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 7870 transitions. Word has length 71 [2021-11-07 02:06:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:39,809 INFO L470 AbstractCegarLoop]: Abstraction has 4356 states and 7870 transitions. [2021-11-07 02:06:39,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-07 02:06:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 7870 transitions. [2021-11-07 02:06:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:06:39,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:39,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:39,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:40,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:40,033 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash -538001300, now seen corresponding path program 1 times [2021-11-07 02:06:40,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:40,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229739828] [2021-11-07 02:06:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:40,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:40,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:40,036 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:40,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:06:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:40,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:40,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:40,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:40,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:40,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229739828] [2021-11-07 02:06:40,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229739828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:40,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:40,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:06:40,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951055133] [2021-11-07 02:06:40,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:40,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:40,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:40,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:40,900 INFO L87 Difference]: Start difference. First operand 4356 states and 7870 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-07 02:06:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:41,364 INFO L93 Difference]: Finished difference Result 12109 states and 21905 transitions. [2021-11-07 02:06:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-07 02:06:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:41,389 INFO L225 Difference]: With dead ends: 12109 [2021-11-07 02:06:41,389 INFO L226 Difference]: Without dead ends: 7921 [2021-11-07 02:06:41,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7921 states. [2021-11-07 02:06:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7921 to 7262. [2021-11-07 02:06:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7262 states, 7250 states have (on average 1.821655172413793) internal successors, (13207), 7261 states have internal predecessors, (13207), 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) [2021-11-07 02:06:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7262 states to 7262 states and 13207 transitions. [2021-11-07 02:06:41,880 INFO L78 Accepts]: Start accepts. Automaton has 7262 states and 13207 transitions. Word has length 72 [2021-11-07 02:06:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:41,882 INFO L470 AbstractCegarLoop]: Abstraction has 7262 states and 13207 transitions. [2021-11-07 02:06:41,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-07 02:06:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 7262 states and 13207 transitions. [2021-11-07 02:06:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:06:41,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:41,890 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:41,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:42,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:42,105 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:42,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1587413004, now seen corresponding path program 1 times [2021-11-07 02:06:42,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:42,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612474606] [2021-11-07 02:06:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:42,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:42,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:42,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:42,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:06:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:42,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:42,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:42,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:43,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:43,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612474606] [2021-11-07 02:06:43,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612474606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:43,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:43,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:06:43,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710116535] [2021-11-07 02:06:43,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:43,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:43,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:43,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:43,040 INFO L87 Difference]: Start difference. First operand 7262 states and 13207 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-07 02:06:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:43,539 INFO L93 Difference]: Finished difference Result 21153 states and 38527 transitions. [2021-11-07 02:06:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:43,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 73 [2021-11-07 02:06:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:43,583 INFO L225 Difference]: With dead ends: 21153 [2021-11-07 02:06:43,583 INFO L226 Difference]: Without dead ends: 14067 [2021-11-07 02:06:43,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14067 states. [2021-11-07 02:06:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14067 to 13408. [2021-11-07 02:06:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13408 states, 13396 states have (on average 1.828008360704688) internal successors, (24488), 13407 states have internal predecessors, (24488), 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) [2021-11-07 02:06:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13408 states to 13408 states and 24488 transitions. [2021-11-07 02:06:44,456 INFO L78 Accepts]: Start accepts. Automaton has 13408 states and 24488 transitions. Word has length 73 [2021-11-07 02:06:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:44,456 INFO L470 AbstractCegarLoop]: Abstraction has 13408 states and 24488 transitions. [2021-11-07 02:06:44,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-11-07 02:06:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 13408 states and 24488 transitions. [2021-11-07 02:06:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:06:44,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:44,467 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:44,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:44,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:44,681 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:44,682 INFO L85 PathProgramCache]: Analyzing trace with hash 9838812, now seen corresponding path program 1 times [2021-11-07 02:06:44,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:44,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468861390] [2021-11-07 02:06:44,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:44,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:44,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:44,684 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:44,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:06:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:45,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:45,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:06:45,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:06:45,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:45,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468861390] [2021-11-07 02:06:45,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468861390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:45,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:45,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:06:45,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072119795] [2021-11-07 02:06:45,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:45,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:45,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:45,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:06:45,731 INFO L87 Difference]: Start difference. First operand 13408 states and 24488 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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) [2021-11-07 02:06:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:49,150 INFO L93 Difference]: Finished difference Result 33321 states and 60829 transitions. [2021-11-07 02:06:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:06:49,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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 74 [2021-11-07 02:06:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:49,210 INFO L225 Difference]: With dead ends: 33321 [2021-11-07 02:06:49,210 INFO L226 Difference]: Without dead ends: 20210 [2021-11-07 02:06:49,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:06:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20210 states. [2021-11-07 02:06:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20210 to 13375. [2021-11-07 02:06:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13375 states, 13363 states have (on average 1.8226446157300007) internal successors, (24356), 13374 states have internal predecessors, (24356), 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) [2021-11-07 02:06:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13375 states to 13375 states and 24356 transitions. [2021-11-07 02:06:50,226 INFO L78 Accepts]: Start accepts. Automaton has 13375 states and 24356 transitions. Word has length 74 [2021-11-07 02:06:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:50,227 INFO L470 AbstractCegarLoop]: Abstraction has 13375 states and 24356 transitions. [2021-11-07 02:06:50,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 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) [2021-11-07 02:06:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 13375 states and 24356 transitions. [2021-11-07 02:06:50,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:06:50,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:50,237 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:50,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:50,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:50,453 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash 219115229, now seen corresponding path program 1 times [2021-11-07 02:06:50,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:50,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015467925] [2021-11-07 02:06:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:50,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:50,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:50,455 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:50,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:06:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:51,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:51,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:51,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:51,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:51,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015467925] [2021-11-07 02:06:51,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015467925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:51,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:51,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:06:51,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702011527] [2021-11-07 02:06:51,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:51,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:51,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:51,639 INFO L87 Difference]: Start difference. First operand 13375 states and 24356 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-07 02:06:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:52,476 INFO L93 Difference]: Finished difference Result 39324 states and 71681 transitions. [2021-11-07 02:06:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:52,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2021-11-07 02:06:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:52,546 INFO L225 Difference]: With dead ends: 39324 [2021-11-07 02:06:52,546 INFO L226 Difference]: Without dead ends: 26132 [2021-11-07 02:06:52,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26132 states. [2021-11-07 02:06:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26132 to 25473. [2021-11-07 02:06:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25473 states, 25461 states have (on average 1.8251050626448293) internal successors, (46469), 25472 states have internal predecessors, (46469), 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) [2021-11-07 02:06:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25473 states to 25473 states and 46469 transitions. [2021-11-07 02:06:54,237 INFO L78 Accepts]: Start accepts. Automaton has 25473 states and 46469 transitions. Word has length 74 [2021-11-07 02:06:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:54,237 INFO L470 AbstractCegarLoop]: Abstraction has 25473 states and 46469 transitions. [2021-11-07 02:06:54,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-07 02:06:54,237 INFO L276 IsEmpty]: Start isEmpty. Operand 25473 states and 46469 transitions. [2021-11-07 02:06:54,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:06:54,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:54,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:54,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:54,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:54,467 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:06:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:54,468 INFO L85 PathProgramCache]: Analyzing trace with hash 951022621, now seen corresponding path program 1 times [2021-11-07 02:06:54,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:54,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525900634] [2021-11-07 02:06:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:54,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:54,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:54,471 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:54,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:06:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:55,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:55,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:55,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:55,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:55,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525900634] [2021-11-07 02:06:55,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525900634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:55,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:55,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:06:55,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608485305] [2021-11-07 02:06:55,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:55,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:55,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:55,544 INFO L87 Difference]: Start difference. First operand 25473 states and 46469 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-11-07 02:06:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:57,443 INFO L93 Difference]: Finished difference Result 70257 states and 127756 transitions. [2021-11-07 02:06:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:57,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 75 [2021-11-07 02:06:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:57,538 INFO L225 Difference]: With dead ends: 70257 [2021-11-07 02:06:57,539 INFO L226 Difference]: Without dead ends: 45014 [2021-11-07 02:06:57,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45014 states. [2021-11-07 02:06:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45014 to 44355. [2021-11-07 02:06:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44355 states, 44343 states have (on average 1.8143562681821257) internal successors, (80454), 44354 states have internal predecessors, (80454), 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) [2021-11-07 02:07:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44355 states to 44355 states and 80454 transitions. [2021-11-07 02:07:00,024 INFO L78 Accepts]: Start accepts. Automaton has 44355 states and 80454 transitions. Word has length 75 [2021-11-07 02:07:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:00,024 INFO L470 AbstractCegarLoop]: Abstraction has 44355 states and 80454 transitions. [2021-11-07 02:07:00,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-11-07 02:07:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 44355 states and 80454 transitions. [2021-11-07 02:07:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:07:00,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:00,035 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 02:07:00,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:00,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:00,251 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:07:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:00,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1060768810, now seen corresponding path program 1 times [2021-11-07 02:07:00,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:00,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610538868] [2021-11-07 02:07:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:00,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:00,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:00,254 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:00,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:07:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:01,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:01,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:07:01,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:07:01,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:01,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610538868] [2021-11-07 02:07:01,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610538868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:01,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:01,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:01,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811705830] [2021-11-07 02:07:01,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:01,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:01,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:01,487 INFO L87 Difference]: Start difference. First operand 44355 states and 80454 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2021-11-07 02:07:08,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:08,759 INFO L93 Difference]: Finished difference Result 172688 states and 313117 transitions. [2021-11-07 02:07:08,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:07:08,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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 76 [2021-11-07 02:07:08,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:09,047 INFO L225 Difference]: With dead ends: 172688 [2021-11-07 02:07:09,048 INFO L226 Difference]: Without dead ends: 128629 [2021-11-07 02:07:09,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:07:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128629 states. [2021-11-07 02:07:12,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128629 to 44097. [2021-11-07 02:07:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44097 states, 44085 states have (on average 1.8015651582170806) internal successors, (79422), 44096 states have internal predecessors, (79422), 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) [2021-11-07 02:07:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44097 states to 44097 states and 79422 transitions. [2021-11-07 02:07:12,407 INFO L78 Accepts]: Start accepts. Automaton has 44097 states and 79422 transitions. Word has length 76 [2021-11-07 02:07:12,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:12,407 INFO L470 AbstractCegarLoop]: Abstraction has 44097 states and 79422 transitions. [2021-11-07 02:07:12,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2021-11-07 02:07:12,407 INFO L276 IsEmpty]: Start isEmpty. Operand 44097 states and 79422 transitions. [2021-11-07 02:07:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:07:12,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:12,419 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:12,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:07:12,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:12,633 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:07:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:12,633 INFO L85 PathProgramCache]: Analyzing trace with hash 315314680, now seen corresponding path program 1 times [2021-11-07 02:07:12,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:12,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901834237] [2021-11-07 02:07:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:12,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:12,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:12,635 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:12,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:07:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:13,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:13,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:13,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:13,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:13,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901834237] [2021-11-07 02:07:13,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901834237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:13,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:13,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:13,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076538410] [2021-11-07 02:07:13,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:13,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:13,728 INFO L87 Difference]: Start difference. First operand 44097 states and 79422 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2021-11-07 02:07:15,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:15,700 INFO L93 Difference]: Finished difference Result 88551 states and 159424 transitions. [2021-11-07 02:07:15,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:15,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 76 [2021-11-07 02:07:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:15,759 INFO L225 Difference]: With dead ends: 88551 [2021-11-07 02:07:15,760 INFO L226 Difference]: Without dead ends: 44756 [2021-11-07 02:07:15,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44756 states. [2021-11-07 02:07:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44756 to 44097. [2021-11-07 02:07:18,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44097 states, 44085 states have (on average 1.798661676307134) internal successors, (79294), 44096 states have internal predecessors, (79294), 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) [2021-11-07 02:07:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44097 states to 44097 states and 79294 transitions. [2021-11-07 02:07:18,187 INFO L78 Accepts]: Start accepts. Automaton has 44097 states and 79294 transitions. Word has length 76 [2021-11-07 02:07:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:18,187 INFO L470 AbstractCegarLoop]: Abstraction has 44097 states and 79294 transitions. [2021-11-07 02:07:18,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2021-11-07 02:07:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 44097 states and 79294 transitions. [2021-11-07 02:07:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:07:18,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:18,193 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:18,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:18,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:18,394 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 02:07:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1351103275, now seen corresponding path program 1 times [2021-11-07 02:07:18,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:18,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89095847] [2021-11-07 02:07:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:18,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:18,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:18,396 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:18,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fc9c60-b107-4ece-b8cf-526394634eea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:07:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:19,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:19,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:19,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:19,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:19,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89095847] [2021-11-07 02:07:19,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89095847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:19,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:19,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:19,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950693161] [2021-11-07 02:07:19,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:19,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:19,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:19,451 INFO L87 Difference]: Start difference. First operand 44097 states and 79294 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2021-11-07 02:07:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:22,844 INFO L93 Difference]: Finished difference Result 123793 states and 222346 transitions. [2021-11-07 02:07:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:22,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 76 [2021-11-07 02:07:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:22,967 INFO L225 Difference]: With dead ends: 123793 [2021-11-07 02:07:22,968 INFO L226 Difference]: Without dead ends: 79958 [2021-11-07 02:07:22,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79958 states.