./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product33.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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/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 f1bf577a04d9efa22571cde3b0a4348a8cf7d4cfe89b0abb5b80fa76df1bbd4f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:53:42,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:53:42,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:53:42,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:53:42,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:53:42,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:53:42,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:53:42,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:53:42,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:53:42,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:53:42,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:53:42,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:53:42,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:53:42,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:53:42,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:53:43,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:53:43,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:53:43,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:53:43,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:53:43,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:53:43,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:53:43,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:53:43,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:53:43,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:53:43,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:53:43,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:53:43,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:53:43,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:53:43,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:53:43,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:53:43,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:53:43,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:53:43,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:53:43,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:53:43,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:53:43,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:53:43,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:53:43,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:53:43,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:53:43,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:53:43,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:53:43,042 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:53:43,073 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:53:43,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:53:43,075 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:53:43,075 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:53:43,075 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:53:43,076 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:53:43,076 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:53:43,076 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:53:43,077 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:53:43,077 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:53:43,077 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:53:43,077 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:53:43,078 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:53:43,078 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:53:43,078 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:53:43,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:53:43,080 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:53:43,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:53:43,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:53:43,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:53:43,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:53:43,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:53:43,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:53:43,082 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:53:43,082 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:53:43,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:53:43,082 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:53:43,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:53:43,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:53:43,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:53:43,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:53:43,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:53:43,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:53:43,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:53:43,085 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:53:43,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:53:43,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:53:43,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:53:43,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:53:43,086 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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1bf577a04d9efa22571cde3b0a4348a8cf7d4cfe89b0abb5b80fa76df1bbd4f [2021-11-07 01:53:43,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:53:43,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:53:43,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:53:43,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:53:43,442 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:53:43,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product33.cil.c [2021-11-07 01:53:43,532 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/data/b4f6ec366/03f473894f8a42e19b7d749b1c71f304/FLAG410d3adfd [2021-11-07 01:53:44,354 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:53:44,355 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/sv-benchmarks/c/product-lines/email_spec7_product33.cil.c [2021-11-07 01:53:44,402 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/data/b4f6ec366/03f473894f8a42e19b7d749b1c71f304/FLAG410d3adfd [2021-11-07 01:53:44,499 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/data/b4f6ec366/03f473894f8a42e19b7d749b1c71f304 [2021-11-07 01:53:44,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:53:44,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:53:44,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:53:44,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:53:44,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:53:44,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:53:44" (1/1) ... [2021-11-07 01:53:44,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a4a9a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:44, skipping insertion in model container [2021-11-07 01:53:44,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:53:44" (1/1) ... [2021-11-07 01:53:44,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:53:44,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:53:45,230 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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/sv-benchmarks/c/product-lines/email_spec7_product33.cil.c[20852,20865] [2021-11-07 01:53:45,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:53:45,475 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 01:53:45,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@226342cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:45, skipping insertion in model container [2021-11-07 01:53:45,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:53:45,476 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:53:45,479 INFO L168 Benchmark]: Toolchain (without parser) took 966.71 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 40.2 MB in the beginning and 64.2 MB in the end (delta: -24.0 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:53:45,480 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 81.8 MB. Free memory was 59.6 MB in the beginning and 59.6 MB in the end (delta: 50.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:53:45,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 961.40 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 40.0 MB in the beginning and 64.2 MB in the end (delta: -24.2 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:53:45,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 81.8 MB. Free memory was 59.6 MB in the beginning and 59.6 MB in the end (delta: 50.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 961.40 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 40.0 MB in the beginning and 64.2 MB in the end (delta: -24.2 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 237]: 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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/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 f1bf577a04d9efa22571cde3b0a4348a8cf7d4cfe89b0abb5b80fa76df1bbd4f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:53:48,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:53:48,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:53:48,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:53:48,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:53:48,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:53:48,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:53:48,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:53:48,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:53:48,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:53:48,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:53:48,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:53:48,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:53:48,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:53:48,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:53:48,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:53:48,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:53:48,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:53:48,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:53:48,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:53:48,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:53:48,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:53:48,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:53:48,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:53:48,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:53:48,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:53:48,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:53:48,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:53:48,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:53:48,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:53:48,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:53:48,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:53:48,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:53:48,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:53:48,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:53:48,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:53:48,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:53:48,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:53:48,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:53:48,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:53:48,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:53:48,295 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:53:48,350 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:53:48,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:53:48,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:53:48,353 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:53:48,353 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:53:48,353 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:53:48,353 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:53:48,354 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:53:48,354 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:53:48,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:53:48,357 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:53:48,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:53:48,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:53:48,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:53:48,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:53:48,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:53:48,358 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:53:48,359 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:53:48,359 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:53:48,359 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:53:48,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:53:48,360 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:53:48,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:53:48,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:53:48,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:53:48,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:53:48,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:53:48,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:53:48,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:53:48,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:53:48,362 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:53:48,362 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:48,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:53:48,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:53:48,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:53:48,364 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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1bf577a04d9efa22571cde3b0a4348a8cf7d4cfe89b0abb5b80fa76df1bbd4f [2021-11-07 01:53:48,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:53:48,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:53:48,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:53:48,866 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:53:48,867 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:53:48,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product33.cil.c [2021-11-07 01:53:48,950 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/data/96e5df886/0a9efc0adc5a4e349835038905aeba27/FLAG3b8728c4e [2021-11-07 01:53:49,787 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:53:49,788 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/sv-benchmarks/c/product-lines/email_spec7_product33.cil.c [2021-11-07 01:53:49,831 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/data/96e5df886/0a9efc0adc5a4e349835038905aeba27/FLAG3b8728c4e [2021-11-07 01:53:49,957 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/data/96e5df886/0a9efc0adc5a4e349835038905aeba27 [2021-11-07 01:53:49,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:53:49,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:53:49,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:53:49,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:53:49,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:53:49,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:53:49" (1/1) ... [2021-11-07 01:53:49,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30422e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:49, skipping insertion in model container [2021-11-07 01:53:49,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:53:49" (1/1) ... [2021-11-07 01:53:50,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:53:50,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:53:50,695 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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/sv-benchmarks/c/product-lines/email_spec7_product33.cil.c[20852,20865] [2021-11-07 01:53:50,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:53:50,987 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:53:51,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:53:51,096 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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/sv-benchmarks/c/product-lines/email_spec7_product33.cil.c[20852,20865] [2021-11-07 01:53:51,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:53:51,177 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:53:51,239 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_3110b734-8d85-4e0c-8541-c85a5d4c86e9/sv-benchmarks/c/product-lines/email_spec7_product33.cil.c[20852,20865] [2021-11-07 01:53:51,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:53:51,359 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:53:51,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51 WrapperNode [2021-11-07 01:53:51,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:53:51,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:53:51,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:53:51,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:53:51,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51" (1/1) ... [2021-11-07 01:53:51,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51" (1/1) ... [2021-11-07 01:53:51,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:53:51,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:53:51,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:53:51,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:53:51,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51" (1/1) ... [2021-11-07 01:53:51,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51" (1/1) ... [2021-11-07 01:53:51,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51" (1/1) ... [2021-11-07 01:53:51,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51" (1/1) ... [2021-11-07 01:53:51,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51" (1/1) ... [2021-11-07 01:53:51,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51" (1/1) ... [2021-11-07 01:53:51,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51" (1/1) ... [2021-11-07 01:53:51,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:53:51,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:53:51,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:53:51,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:53:51,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51" (1/1) ... [2021-11-07 01:53:51,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:53:51,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:51,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:53:51,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:53:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:53:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:53:51,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:53:51,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:53:51,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:53:56,963 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:53:56,964 INFO L299 CfgBuilder]: Removed 407 assume(true) statements. [2021-11-07 01:53:56,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:56 BoogieIcfgContainer [2021-11-07 01:53:56,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:53:56,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:53:56,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:53:56,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:53:56,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:53:49" (1/3) ... [2021-11-07 01:53:56,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d9e0de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:56, skipping insertion in model container [2021-11-07 01:53:56,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:53:51" (2/3) ... [2021-11-07 01:53:56,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d9e0de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:56, skipping insertion in model container [2021-11-07 01:53:56,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:56" (3/3) ... [2021-11-07 01:53:56,978 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product33.cil.c [2021-11-07 01:53:56,984 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:53:56,984 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:53:57,046 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:53:57,053 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 01:53:57,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:53:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 591 states, 588 states have (on average 1.7295918367346939) internal successors, (1017), 590 states have internal predecessors, (1017), 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 01:53:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:53:57,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:57,114 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 01:53:57,115 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:53:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1254893997, now seen corresponding path program 1 times [2021-11-07 01:53:57,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:57,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050939514] [2021-11-07 01:53:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:57,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:57,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:57,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:57,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:53:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:57,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:53:57,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:57,865 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 01:53:57,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:58,033 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 01:53:58,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:58,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050939514] [2021-11-07 01:53:58,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050939514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:58,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:58,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:53:58,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624617585] [2021-11-07 01:53:58,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:53:58,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:53:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:53:58,066 INFO L87 Difference]: Start difference. First operand has 591 states, 588 states have (on average 1.7295918367346939) internal successors, (1017), 590 states have internal predecessors, (1017), 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 26.0) internal successors, (52), 2 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 01:53:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:58,166 INFO L93 Difference]: Finished difference Result 936 states and 1586 transitions. [2021-11-07 01:53:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:53:58,174 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 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 52 [2021-11-07 01:53:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:58,197 INFO L225 Difference]: With dead ends: 936 [2021-11-07 01:53:58,198 INFO L226 Difference]: Without dead ends: 495 [2021-11-07 01:53:58,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 102 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 01:53:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-07 01:53:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2021-11-07 01:53:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 493 states have (on average 1.7363083164300204) internal successors, (856), 494 states have internal predecessors, (856), 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 01:53:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 856 transitions. [2021-11-07 01:53:58,302 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 856 transitions. Word has length 52 [2021-11-07 01:53:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:58,303 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 856 transitions. [2021-11-07 01:53:58,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 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 01:53:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 856 transitions. [2021-11-07 01:53:58,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:53:58,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:58,316 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 01:53:58,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:58,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:58,517 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:53:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:58,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1687366310, now seen corresponding path program 1 times [2021-11-07 01:53:58,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:58,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141285124] [2021-11-07 01:53:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:58,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:58,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:58,521 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:58,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:53:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:58,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:53:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:59,303 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 01:53:59,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:59,530 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 01:53:59,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:59,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141285124] [2021-11-07 01:53:59,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141285124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:59,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:59,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:53:59,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520087164] [2021-11-07 01:53:59,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:53:59,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:59,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:53:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:53:59,536 INFO L87 Difference]: Start difference. First operand 495 states and 856 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 01:53:59,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:59,680 INFO L93 Difference]: Finished difference Result 1455 states and 2520 transitions. [2021-11-07 01:53:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:59,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 01:53:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:59,692 INFO L225 Difference]: With dead ends: 1455 [2021-11-07 01:53:59,692 INFO L226 Difference]: Without dead ends: 975 [2021-11-07 01:53:59,700 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 01:53:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-07 01:53:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 494. [2021-11-07 01:53:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 492 states have (on average 1.7296747967479675) internal successors, (851), 493 states have internal predecessors, (851), 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 01:53:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 851 transitions. [2021-11-07 01:53:59,792 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 851 transitions. Word has length 53 [2021-11-07 01:53:59,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:59,792 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 851 transitions. [2021-11-07 01:53:59,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 01:53:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 851 transitions. [2021-11-07 01:53:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:53:59,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:59,796 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] [2021-11-07 01:53:59,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:54:00,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:00,014 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:00,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:00,015 INFO L85 PathProgramCache]: Analyzing trace with hash 646665664, now seen corresponding path program 1 times [2021-11-07 01:54:00,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:00,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369472213] [2021-11-07 01:54:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:00,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:00,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:00,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:00,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:54:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:00,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:54:00,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:00,716 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 01:54:00,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:00,888 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 01:54:00,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:00,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369472213] [2021-11-07 01:54:00,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369472213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:00,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:00,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:00,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994140371] [2021-11-07 01:54:00,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:00,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:00,892 INFO L87 Difference]: Start difference. First operand 494 states and 851 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 01:54:01,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:01,171 INFO L93 Difference]: Finished difference Result 1893 states and 3266 transitions. [2021-11-07 01:54:01,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:54:01,173 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 55 [2021-11-07 01:54:01,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:01,189 INFO L225 Difference]: With dead ends: 1893 [2021-11-07 01:54:01,189 INFO L226 Difference]: Without dead ends: 1417 [2021-11-07 01:54:01,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 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 01:54:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-11-07 01:54:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 493. [2021-11-07 01:54:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 491 states have (on average 1.725050916496945) internal successors, (847), 492 states have internal predecessors, (847), 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 01:54:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 847 transitions. [2021-11-07 01:54:01,245 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 847 transitions. Word has length 55 [2021-11-07 01:54:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:01,246 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 847 transitions. [2021-11-07 01:54:01,248 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 01:54:01,248 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 847 transitions. [2021-11-07 01:54:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:54:01,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:01,250 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 01:54:01,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:01,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:01,467 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1979516883, now seen corresponding path program 1 times [2021-11-07 01:54:01,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:01,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180161400] [2021-11-07 01:54:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:01,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:01,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:01,473 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:01,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:54:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:01,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:54:01,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:02,161 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 01:54:02,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:02,343 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 01:54:02,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:02,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180161400] [2021-11-07 01:54:02,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180161400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:02,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:02,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:54:02,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125463409] [2021-11-07 01:54:02,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:02,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:02,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:02,348 INFO L87 Difference]: Start difference. First operand 493 states and 847 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 01:54:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:02,440 INFO L93 Difference]: Finished difference Result 983 states and 1691 transitions. [2021-11-07 01:54:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:54:02,441 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 01:54:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:02,445 INFO L225 Difference]: With dead ends: 983 [2021-11-07 01:54:02,446 INFO L226 Difference]: Without dead ends: 498 [2021-11-07 01:54:02,447 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 01:54:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-07 01:54:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 493. [2021-11-07 01:54:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 491 states have (on average 1.7189409368635438) internal successors, (844), 492 states have internal predecessors, (844), 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 01:54:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 844 transitions. [2021-11-07 01:54:02,494 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 844 transitions. Word has length 56 [2021-11-07 01:54:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:02,495 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 844 transitions. [2021-11-07 01:54:02,496 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 01:54:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 844 transitions. [2021-11-07 01:54:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:54:02,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:02,498 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] [2021-11-07 01:54:02,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:02,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:02,716 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash 6888616, now seen corresponding path program 1 times [2021-11-07 01:54:02,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:02,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350741402] [2021-11-07 01:54:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:02,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:02,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:02,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:02,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:54:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:03,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:54:03,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:03,375 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 01:54:03,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:03,594 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 01:54:03,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:03,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350741402] [2021-11-07 01:54:03,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350741402] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:03,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:03,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:03,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480622592] [2021-11-07 01:54:03,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:03,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:03,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:03,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:03,612 INFO L87 Difference]: Start difference. First operand 493 states and 844 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 01:54:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:03,936 INFO L93 Difference]: Finished difference Result 1880 states and 3242 transitions. [2021-11-07 01:54:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:54:03,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 57 [2021-11-07 01:54:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:03,948 INFO L225 Difference]: With dead ends: 1880 [2021-11-07 01:54:03,948 INFO L226 Difference]: Without dead ends: 1413 [2021-11-07 01:54:03,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 01:54:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-11-07 01:54:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 493. [2021-11-07 01:54:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 491 states have (on average 1.7128309572301426) internal successors, (841), 492 states have internal predecessors, (841), 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 01:54:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 841 transitions. [2021-11-07 01:54:04,018 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 841 transitions. Word has length 57 [2021-11-07 01:54:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:04,018 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 841 transitions. [2021-11-07 01:54:04,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 01:54:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 841 transitions. [2021-11-07 01:54:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:54:04,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:04,021 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] [2021-11-07 01:54:04,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:04,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:04,238 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:04,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:04,239 INFO L85 PathProgramCache]: Analyzing trace with hash -327337949, now seen corresponding path program 1 times [2021-11-07 01:54:04,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:04,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598117598] [2021-11-07 01:54:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:04,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:04,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:04,241 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:04,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:54:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:04,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:04,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:04,932 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 01:54:04,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:05,106 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 01:54:05,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:05,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598117598] [2021-11-07 01:54:05,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598117598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:05,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:05,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:54:05,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981306266] [2021-11-07 01:54:05,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:05,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:05,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:05,109 INFO L87 Difference]: Start difference. First operand 493 states and 841 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 01:54:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:05,230 INFO L93 Difference]: Finished difference Result 1209 states and 2063 transitions. [2021-11-07 01:54:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:54:05,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 59 [2021-11-07 01:54:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:05,237 INFO L225 Difference]: With dead ends: 1209 [2021-11-07 01:54:05,237 INFO L226 Difference]: Without dead ends: 960 [2021-11-07 01:54:05,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 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 01:54:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-11-07 01:54:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 711. [2021-11-07 01:54:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 709 states have (on average 1.7475317348377997) internal successors, (1239), 710 states have internal predecessors, (1239), 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 01:54:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1239 transitions. [2021-11-07 01:54:05,307 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1239 transitions. Word has length 59 [2021-11-07 01:54:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:05,308 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1239 transitions. [2021-11-07 01:54:05,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 01:54:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1239 transitions. [2021-11-07 01:54:05,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:54:05,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:05,311 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 01:54:05,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:05,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:05,528 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:05,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1825772524, now seen corresponding path program 1 times [2021-11-07 01:54:05,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:05,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625277273] [2021-11-07 01:54:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:05,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:05,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:05,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:05,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:54:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:06,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:06,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:06,335 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 01:54:06,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:06,523 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 01:54:06,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:06,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625277273] [2021-11-07 01:54:06,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625277273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:06,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:06,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:06,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021248748] [2021-11-07 01:54:06,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:06,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:06,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:06,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:06,526 INFO L87 Difference]: Start difference. First operand 711 states and 1239 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 01:54:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:06,626 INFO L93 Difference]: Finished difference Result 1753 states and 3058 transitions. [2021-11-07 01:54:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:06,627 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 01:54:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:06,635 INFO L225 Difference]: With dead ends: 1753 [2021-11-07 01:54:06,635 INFO L226 Difference]: Without dead ends: 1126 [2021-11-07 01:54:06,637 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 01:54:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-11-07 01:54:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 877. [2021-11-07 01:54:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 875 states have (on average 1.76) internal successors, (1540), 876 states have internal predecessors, (1540), 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 01:54:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1540 transitions. [2021-11-07 01:54:06,749 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1540 transitions. Word has length 71 [2021-11-07 01:54:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:06,751 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1540 transitions. [2021-11-07 01:54:06,752 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 01:54:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1540 transitions. [2021-11-07 01:54:06,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:54:06,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:06,755 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 01:54:06,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:54:06,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:06,972 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:06,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:06,972 INFO L85 PathProgramCache]: Analyzing trace with hash 654489843, now seen corresponding path program 1 times [2021-11-07 01:54:06,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:06,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012799199] [2021-11-07 01:54:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:06,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:06,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:06,975 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:06,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:54:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:07,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:07,643 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 01:54:07,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:07,844 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 01:54:07,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:07,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012799199] [2021-11-07 01:54:07,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012799199] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:07,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:07,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:07,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640688731] [2021-11-07 01:54:07,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:07,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:07,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:07,847 INFO L87 Difference]: Start difference. First operand 877 states and 1540 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 01:54:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:07,971 INFO L93 Difference]: Finished difference Result 2283 states and 4026 transitions. [2021-11-07 01:54:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:07,972 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 01:54:07,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:07,983 INFO L225 Difference]: With dead ends: 2283 [2021-11-07 01:54:07,983 INFO L226 Difference]: Without dead ends: 1498 [2021-11-07 01:54:07,989 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 01:54:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-11-07 01:54:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1249. [2021-11-07 01:54:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1247 states have (on average 1.7786688051323176) internal successors, (2218), 1248 states have internal predecessors, (2218), 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 01:54:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2218 transitions. [2021-11-07 01:54:08,103 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2218 transitions. Word has length 72 [2021-11-07 01:54:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:08,104 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 2218 transitions. [2021-11-07 01:54:08,104 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 01:54:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2218 transitions. [2021-11-07 01:54:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:54:08,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:08,112 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 01:54:08,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:08,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:08,328 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:08,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:08,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2119535170, now seen corresponding path program 1 times [2021-11-07 01:54:08,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:08,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867115295] [2021-11-07 01:54:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:08,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:08,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:08,333 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:08,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:54:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:09,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:09,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:09,245 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 01:54:09,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:09,455 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 01:54:09,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:09,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867115295] [2021-11-07 01:54:09,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867115295] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:09,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:09,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:09,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15330573] [2021-11-07 01:54:09,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:09,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:09,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:09,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:09,458 INFO L87 Difference]: Start difference. First operand 1249 states and 2218 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 01:54:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:09,645 INFO L93 Difference]: Finished difference Result 3379 states and 6029 transitions. [2021-11-07 01:54:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:09,646 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 01:54:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:09,663 INFO L225 Difference]: With dead ends: 3379 [2021-11-07 01:54:09,664 INFO L226 Difference]: Without dead ends: 2230 [2021-11-07 01:54:09,667 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 01:54:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-11-07 01:54:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1981. [2021-11-07 01:54:09,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1979 states have (on average 1.7953511874684185) internal successors, (3553), 1980 states have internal predecessors, (3553), 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 01:54:09,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3553 transitions. [2021-11-07 01:54:09,829 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3553 transitions. Word has length 73 [2021-11-07 01:54:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:09,829 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3553 transitions. [2021-11-07 01:54:09,830 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 01:54:09,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3553 transitions. [2021-11-07 01:54:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:54:09,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:09,837 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 01:54:09,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:10,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:10,056 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:10,057 INFO L85 PathProgramCache]: Analyzing trace with hash -823760958, now seen corresponding path program 1 times [2021-11-07 01:54:10,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:10,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279490733] [2021-11-07 01:54:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:10,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:10,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:10,059 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:10,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:54:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:10,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:10,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:10,885 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 01:54:10,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:11,094 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 01:54:11,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:11,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279490733] [2021-11-07 01:54:11,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279490733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:11,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:11,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:11,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520992370] [2021-11-07 01:54:11,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:11,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:11,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:11,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:11,097 INFO L87 Difference]: Start difference. First operand 1981 states and 3553 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 01:54:11,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:11,343 INFO L93 Difference]: Finished difference Result 5311 states and 9553 transitions. [2021-11-07 01:54:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:11,344 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 01:54:11,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:11,371 INFO L225 Difference]: With dead ends: 5311 [2021-11-07 01:54:11,371 INFO L226 Difference]: Without dead ends: 3464 [2021-11-07 01:54:11,374 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 01:54:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-07 01:54:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3215. [2021-11-07 01:54:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3215 states, 3213 states have (on average 1.8045440398381576) internal successors, (5798), 3214 states have internal predecessors, (5798), 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 01:54:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 5798 transitions. [2021-11-07 01:54:11,646 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 5798 transitions. Word has length 74 [2021-11-07 01:54:11,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:11,647 INFO L470 AbstractCegarLoop]: Abstraction has 3215 states and 5798 transitions. [2021-11-07 01:54:11,647 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 01:54:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 5798 transitions. [2021-11-07 01:54:11,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:54:11,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:11,655 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 01:54:11,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:11,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:11,878 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:11,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:11,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1278991219, now seen corresponding path program 1 times [2021-11-07 01:54:11,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:11,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403879494] [2021-11-07 01:54:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:11,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:11,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:11,881 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:11,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:54:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:12,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:12,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:12,825 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 01:54:12,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:13,063 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 01:54:13,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:13,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403879494] [2021-11-07 01:54:13,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403879494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:13,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:13,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:13,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464332559] [2021-11-07 01:54:13,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:13,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:13,066 INFO L87 Difference]: Start difference. First operand 3215 states and 5798 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 01:54:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:13,475 INFO L93 Difference]: Finished difference Result 8729 states and 15771 transitions. [2021-11-07 01:54:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:13,476 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 01:54:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:13,520 INFO L225 Difference]: With dead ends: 8729 [2021-11-07 01:54:13,521 INFO L226 Difference]: Without dead ends: 5682 [2021-11-07 01:54:13,526 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 01:54:13,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5682 states. [2021-11-07 01:54:13,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5682 to 5433. [2021-11-07 01:54:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 5431 states have (on average 1.8086908488307862) internal successors, (9823), 5432 states have internal predecessors, (9823), 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 01:54:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 9823 transitions. [2021-11-07 01:54:14,000 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 9823 transitions. Word has length 75 [2021-11-07 01:54:14,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:14,000 INFO L470 AbstractCegarLoop]: Abstraction has 5433 states and 9823 transitions. [2021-11-07 01:54:14,001 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 01:54:14,001 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 9823 transitions. [2021-11-07 01:54:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:54:14,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:14,010 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 01:54:14,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:14,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:14,224 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1206323245, now seen corresponding path program 1 times [2021-11-07 01:54:14,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:14,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732981830] [2021-11-07 01:54:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:14,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:14,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:14,228 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:14,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:54:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:14,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:15,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:15,314 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 01:54:15,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:15,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732981830] [2021-11-07 01:54:15,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732981830] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:15,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:15,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:15,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756017000] [2021-11-07 01:54:15,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:15,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:15,317 INFO L87 Difference]: Start difference. First operand 5433 states and 9823 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 01:54:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:15,938 INFO L93 Difference]: Finished difference Result 15709 states and 28457 transitions. [2021-11-07 01:54:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:15,939 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 01:54:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:16,003 INFO L225 Difference]: With dead ends: 15709 [2021-11-07 01:54:16,003 INFO L226 Difference]: Without dead ends: 10452 [2021-11-07 01:54:16,013 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 01:54:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10452 states. [2021-11-07 01:54:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10452 to 10203. [2021-11-07 01:54:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10203 states, 10201 states have (on average 1.8115870993039898) internal successors, (18480), 10202 states have internal predecessors, (18480), 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 01:54:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10203 states to 10203 states and 18480 transitions. [2021-11-07 01:54:16,831 INFO L78 Accepts]: Start accepts. Automaton has 10203 states and 18480 transitions. Word has length 76 [2021-11-07 01:54:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:16,832 INFO L470 AbstractCegarLoop]: Abstraction has 10203 states and 18480 transitions. [2021-11-07 01:54:16,832 INFO L471 AbstractCegarLoop]: INTERPOLANT 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) [2021-11-07 01:54:16,833 INFO L276 IsEmpty]: Start isEmpty. Operand 10203 states and 18480 transitions. [2021-11-07 01:54:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:54:16,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:16,845 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, 1, 1, 1] [2021-11-07 01:54:16,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:54:17,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:17,064 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:17,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1921793731, now seen corresponding path program 1 times [2021-11-07 01:54:17,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:17,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669280558] [2021-11-07 01:54:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:17,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:17,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:17,068 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:17,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:54:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:17,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:18,075 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 01:54:18,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:18,389 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 01:54:18,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:18,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669280558] [2021-11-07 01:54:18,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669280558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:18,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:18,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:18,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329869708] [2021-11-07 01:54:18,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:18,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:18,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:18,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:18,392 INFO L87 Difference]: Start difference. First operand 10203 states and 18480 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 01:54:21,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:21,642 INFO L93 Difference]: Finished difference Result 25168 states and 45593 transitions. [2021-11-07 01:54:21,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:54:21,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 77 [2021-11-07 01:54:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:21,711 INFO L225 Difference]: With dead ends: 25168 [2021-11-07 01:54:21,711 INFO L226 Difference]: Without dead ends: 15219 [2021-11-07 01:54:21,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 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 01:54:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15219 states. [2021-11-07 01:54:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15219 to 10170. [2021-11-07 01:54:22,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10170 states, 10168 states have (on average 1.8044846577498033) internal successors, (18348), 10169 states have internal predecessors, (18348), 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 01:54:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10170 states to 10170 states and 18348 transitions. [2021-11-07 01:54:22,638 INFO L78 Accepts]: Start accepts. Automaton has 10170 states and 18348 transitions. Word has length 77 [2021-11-07 01:54:22,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:22,638 INFO L470 AbstractCegarLoop]: Abstraction has 10170 states and 18348 transitions. [2021-11-07 01:54:22,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 01:54:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 10170 states and 18348 transitions. [2021-11-07 01:54:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:54:22,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:22,649 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, 1] [2021-11-07 01:54:22,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:54:22,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:22,864 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:22,864 INFO L85 PathProgramCache]: Analyzing trace with hash -630731934, now seen corresponding path program 1 times [2021-11-07 01:54:22,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:22,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065576827] [2021-11-07 01:54:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:22,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:22,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:22,867 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:22,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:54:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:23,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:23,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:23,782 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 01:54:23,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:23,983 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 01:54:23,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:23,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065576827] [2021-11-07 01:54:23,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065576827] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:23,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:23,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:23,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120961386] [2021-11-07 01:54:23,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:23,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:23,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:23,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:23,985 INFO L87 Difference]: Start difference. First operand 10170 states and 18348 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 01:54:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:24,839 INFO L93 Difference]: Finished difference Result 29752 states and 53739 transitions. [2021-11-07 01:54:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 77 [2021-11-07 01:54:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:24,900 INFO L225 Difference]: With dead ends: 29752 [2021-11-07 01:54:24,901 INFO L226 Difference]: Without dead ends: 19765 [2021-11-07 01:54:24,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 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 01:54:24,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19765 states. [2021-11-07 01:54:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19765 to 19516. [2021-11-07 01:54:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19516 states, 19514 states have (on average 1.8044993338116224) internal successors, (35213), 19515 states have internal predecessors, (35213), 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 01:54:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19516 states to 19516 states and 35213 transitions. [2021-11-07 01:54:26,232 INFO L78 Accepts]: Start accepts. Automaton has 19516 states and 35213 transitions. Word has length 77 [2021-11-07 01:54:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:26,233 INFO L470 AbstractCegarLoop]: Abstraction has 19516 states and 35213 transitions. [2021-11-07 01:54:26,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 01:54:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 19516 states and 35213 transitions. [2021-11-07 01:54:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:54:26,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:26,249 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, 1, 1] [2021-11-07 01:54:26,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:26,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:26,464 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:26,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1926578654, now seen corresponding path program 1 times [2021-11-07 01:54:26,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:26,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022127286] [2021-11-07 01:54:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:26,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:26,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:26,466 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:26,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:54:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:27,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:27,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:27,340 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 01:54:27,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:27,546 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 01:54:27,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:27,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022127286] [2021-11-07 01:54:27,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022127286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:27,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:27,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:27,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101008766] [2021-11-07 01:54:27,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:27,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:27,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:27,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:27,549 INFO L87 Difference]: Start difference. First operand 19516 states and 35213 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 01:54:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:29,226 INFO L93 Difference]: Finished difference Result 57976 states and 104648 transitions. [2021-11-07 01:54:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:29,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2021-11-07 01:54:29,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:29,330 INFO L225 Difference]: With dead ends: 57976 [2021-11-07 01:54:29,330 INFO L226 Difference]: Without dead ends: 38647 [2021-11-07 01:54:29,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 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 01:54:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38647 states. [2021-11-07 01:54:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38647 to 38398. [2021-11-07 01:54:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38398 states, 38396 states have (on average 1.8022189811438691) internal successors, (69198), 38397 states have internal predecessors, (69198), 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 01:54:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38398 states to 38398 states and 69198 transitions. [2021-11-07 01:54:31,881 INFO L78 Accepts]: Start accepts. Automaton has 38398 states and 69198 transitions. Word has length 78 [2021-11-07 01:54:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:31,881 INFO L470 AbstractCegarLoop]: Abstraction has 38398 states and 69198 transitions. [2021-11-07 01:54:31,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 01:54:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 38398 states and 69198 transitions. [2021-11-07 01:54:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:54:31,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:31,898 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, 1, 1, 1] [2021-11-07 01:54:31,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:32,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:32,117 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:32,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1877266825, now seen corresponding path program 1 times [2021-11-07 01:54:32,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:32,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979182647] [2021-11-07 01:54:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:32,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:32,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:32,234 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:32,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:54:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:32,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:32,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:33,258 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 01:54:33,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:33,522 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 01:54:33,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:33,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979182647] [2021-11-07 01:54:33,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979182647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:33,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:33,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:33,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915828178] [2021-11-07 01:54:33,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:33,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:33,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:33,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:33,524 INFO L87 Difference]: Start difference. First operand 38398 states and 69198 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 01:54:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:40,666 INFO L93 Difference]: Finished difference Result 148989 states and 268339 transitions. [2021-11-07 01:54:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:54:40,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 79 [2021-11-07 01:54:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:41,165 INFO L225 Difference]: With dead ends: 148989 [2021-11-07 01:54:41,165 INFO L226 Difference]: Without dead ends: 110844 [2021-11-07 01:54:41,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 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 01:54:41,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110844 states. [2021-11-07 01:54:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110844 to 38140. [2021-11-07 01:54:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38140 states, 38138 states have (on average 1.7873511982799308) internal successors, (68166), 38139 states have internal predecessors, (68166), 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 01:54:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38140 states to 38140 states and 68166 transitions. [2021-11-07 01:54:44,467 INFO L78 Accepts]: Start accepts. Automaton has 38140 states and 68166 transitions. Word has length 79 [2021-11-07 01:54:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:44,468 INFO L470 AbstractCegarLoop]: Abstraction has 38140 states and 68166 transitions. [2021-11-07 01:54:44,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 01:54:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 38140 states and 68166 transitions. [2021-11-07 01:54:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:54:44,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:44,483 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, 1, 1, 1] [2021-11-07 01:54:44,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:44,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:44,700 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1317677095, now seen corresponding path program 1 times [2021-11-07 01:54:44,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:44,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817173396] [2021-11-07 01:54:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:44,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:44,703 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:44,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:54:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:45,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:45,634 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 01:54:45,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:45,844 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 01:54:45,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:45,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817173396] [2021-11-07 01:54:45,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817173396] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:45,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:45,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:54:45,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914232897] [2021-11-07 01:54:45,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:45,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:45,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:45,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:45,847 INFO L87 Difference]: Start difference. First operand 38140 states and 68166 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 01:54:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:47,917 INFO L93 Difference]: Finished difference Result 76270 states and 136316 transitions. [2021-11-07 01:54:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:47,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 79 [2021-11-07 01:54:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:47,988 INFO L225 Difference]: With dead ends: 76270 [2021-11-07 01:54:47,989 INFO L226 Difference]: Without dead ends: 38389 [2021-11-07 01:54:48,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 154 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 01:54:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38389 states. [2021-11-07 01:54:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38389 to 38140. [2021-11-07 01:54:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38140 states, 38138 states have (on average 1.7839949656510568) internal successors, (68038), 38139 states have internal predecessors, (68038), 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 01:54:50,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38140 states to 38140 states and 68038 transitions. [2021-11-07 01:54:50,195 INFO L78 Accepts]: Start accepts. Automaton has 38140 states and 68038 transitions. Word has length 79 [2021-11-07 01:54:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:50,195 INFO L470 AbstractCegarLoop]: Abstraction has 38140 states and 68038 transitions. [2021-11-07 01:54:50,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 01:54:50,195 INFO L276 IsEmpty]: Start isEmpty. Operand 38140 states and 68038 transitions. [2021-11-07 01:54:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:54:50,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:50,212 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, 1, 1, 1] [2021-11-07 01:54:50,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:50,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:50,566 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:50,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:50,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1658061740, now seen corresponding path program 1 times [2021-11-07 01:54:50,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:50,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917059443] [2021-11-07 01:54:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:50,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:50,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:50,569 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:50,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:54:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:51,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:51,581 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 01:54:51,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:51,805 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 01:54:51,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:51,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917059443] [2021-11-07 01:54:51,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917059443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:51,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:51,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:51,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559141536] [2021-11-07 01:54:51,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:51,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:51,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:51,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:51,808 INFO L87 Difference]: Start difference. First operand 38140 states and 68038 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 01:54:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:55,079 INFO L93 Difference]: Finished difference Result 106008 states and 188742 transitions. [2021-11-07 01:54:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:55,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2021-11-07 01:54:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:55,192 INFO L225 Difference]: With dead ends: 106008 [2021-11-07 01:54:55,192 INFO L226 Difference]: Without dead ends: 68087 [2021-11-07 01:54:55,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 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 01:54:55,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68087 states. [2021-11-07 01:54:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68087 to 67838. [2021-11-07 01:54:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67838 states, 67836 states have (on average 1.7747361283094523) internal successors, (120391), 67837 states have internal predecessors, (120391), 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 01:54:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67838 states to 67838 states and 120391 transitions. [2021-11-07 01:54:59,154 INFO L78 Accepts]: Start accepts. Automaton has 67838 states and 120391 transitions. Word has length 79 [2021-11-07 01:54:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:59,154 INFO L470 AbstractCegarLoop]: Abstraction has 67838 states and 120391 transitions. [2021-11-07 01:54:59,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 01:54:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 67838 states and 120391 transitions. [2021-11-07 01:54:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:54:59,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:59,167 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, 1, 1, 1, 1] [2021-11-07 01:54:59,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:59,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:59,367 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:59,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:59,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1260118765, now seen corresponding path program 1 times [2021-11-07 01:54:59,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:59,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715713290] [2021-11-07 01:54:59,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:59,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:59,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:59,371 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:59,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:55:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:00,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:00,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:00,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:00,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:00,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715713290] [2021-11-07 01:55:00,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715713290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:00,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [27985297] [2021-11-07 01:55:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:00,711 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:00,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:00,717 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:00,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3110b734-8d85-4e0c-8541-c85a5d4c86e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:55:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:01,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:55:01,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:55:02,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:55:02,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [27985297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:02,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:02,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:55:02,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646753314] [2021-11-07 01:55:02,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:55:02,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:02,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:55:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:55:02,851 INFO L87 Difference]: Start difference. First operand 67838 states and 120391 transitions. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 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)