./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product26.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_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/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_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/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_8ef7a396-e370-4c8f-a166-abc373e5aa3d/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 5be9e48e11f5f92f9ccb04262780ea6fa0bae40b757b81b8e52fca7547f54831 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:31:54,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:31:54,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:31:54,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:31:54,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:31:54,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:31:54,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:31:54,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:31:54,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:31:54,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:31:54,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:31:54,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:31:54,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:31:54,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:31:54,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:31:54,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:31:54,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:31:54,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:31:54,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:31:54,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:31:54,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:31:54,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:31:54,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:31:54,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:31:54,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:31:54,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:31:54,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:31:54,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:31:54,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:31:54,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:31:54,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:31:54,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:31:54,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:31:54,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:31:54,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:31:54,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:31:54,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:31:54,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:31:54,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:31:54,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:31:54,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:31:54,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:31:55,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:31:55,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:31:55,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:31:55,028 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:31:55,028 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:31:55,029 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:31:55,029 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:31:55,029 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:31:55,029 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:31:55,029 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:31:55,030 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:31:55,030 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:31:55,030 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:31:55,030 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:31:55,030 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:31:55,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:31:55,031 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:31:55,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:31:55,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:31:55,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:31:55,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:31:55,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:31:55,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:31:55,033 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:31:55,033 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:31:55,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:31:55,033 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:31:55,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:31:55,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:31:55,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:31:55,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:55,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:31:55,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:31:55,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:31:55,035 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:31:55,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:31:55,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:31:55,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:31:55,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:31:55,043 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_8ef7a396-e370-4c8f-a166-abc373e5aa3d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5be9e48e11f5f92f9ccb04262780ea6fa0bae40b757b81b8e52fca7547f54831 [2021-11-07 01:31:55,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:31:55,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:31:55,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:31:55,366 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:31:55,367 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:31:55,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product26.cil.c [2021-11-07 01:31:55,447 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/data/637405bc4/7d5cd21da5fd41319abca0d8564c13fe/FLAG398091ca2 [2021-11-07 01:31:56,066 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:31:56,080 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/sv-benchmarks/c/product-lines/email_spec8_product26.cil.c [2021-11-07 01:31:56,119 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/data/637405bc4/7d5cd21da5fd41319abca0d8564c13fe/FLAG398091ca2 [2021-11-07 01:31:56,271 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/data/637405bc4/7d5cd21da5fd41319abca0d8564c13fe [2021-11-07 01:31:56,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:31:56,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:31:56,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:56,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:31:56,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:31:56,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:56" (1/1) ... [2021-11-07 01:31:56,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f68dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:56, skipping insertion in model container [2021-11-07 01:31:56,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:56" (1/1) ... [2021-11-07 01:31:56,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:31:56,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:31:56,713 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_8ef7a396-e370-4c8f-a166-abc373e5aa3d/sv-benchmarks/c/product-lines/email_spec8_product26.cil.c[14808,14821] [2021-11-07 01:31:56,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:56,984 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 01:31:56,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4876ac8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:56, skipping insertion in model container [2021-11-07 01:31:56,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:56,985 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:31:56,987 INFO L168 Benchmark]: Toolchain (without parser) took 712.24 ms. Allocated memory is still 92.3 MB. Free memory was 66.6 MB in the beginning and 40.3 MB in the end (delta: 26.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:56,989 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 66.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:31:56,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 710.09 ms. Allocated memory is still 92.3 MB. Free memory was 66.4 MB in the beginning and 40.5 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:56,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 66.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 710.09 ms. Allocated memory is still 92.3 MB. Free memory was 66.4 MB in the beginning and 40.5 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 832]: 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_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/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_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/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_8ef7a396-e370-4c8f-a166-abc373e5aa3d/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 5be9e48e11f5f92f9ccb04262780ea6fa0bae40b757b81b8e52fca7547f54831 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:31:59,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:31:59,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:31:59,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:31:59,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:31:59,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:31:59,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:31:59,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:31:59,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:31:59,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:31:59,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:31:59,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:31:59,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:31:59,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:31:59,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:31:59,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:31:59,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:31:59,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:31:59,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:31:59,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:31:59,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:31:59,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:31:59,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:31:59,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:31:59,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:31:59,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:31:59,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:31:59,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:31:59,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:31:59,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:31:59,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:31:59,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:31:59,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:31:59,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:31:59,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:31:59,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:31:59,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:31:59,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:31:59,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:31:59,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:31:59,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:31:59,315 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:31:59,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:31:59,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:31:59,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:31:59,361 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:31:59,361 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:31:59,361 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:31:59,362 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:31:59,362 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:31:59,362 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:31:59,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:31:59,365 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:31:59,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:31:59,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:31:59,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:31:59,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:31:59,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:31:59,366 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:31:59,366 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:31:59,367 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:31:59,367 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:31:59,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:31:59,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:31:59,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:31:59,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:31:59,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:31:59,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:31:59,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:59,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:31:59,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:31:59,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:31:59,369 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:31:59,370 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:59,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:31:59,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:31:59,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:31:59,371 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_8ef7a396-e370-4c8f-a166-abc373e5aa3d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5be9e48e11f5f92f9ccb04262780ea6fa0bae40b757b81b8e52fca7547f54831 [2021-11-07 01:31:59,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:31:59,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:31:59,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:31:59,779 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:31:59,780 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:31:59,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product26.cil.c [2021-11-07 01:31:59,843 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/data/adfe8c4f7/6fc7fd4d5f424e59875f7c5caf7e0fc5/FLAGba62744a2 [2021-11-07 01:32:00,454 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:32:00,455 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/sv-benchmarks/c/product-lines/email_spec8_product26.cil.c [2021-11-07 01:32:00,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/data/adfe8c4f7/6fc7fd4d5f424e59875f7c5caf7e0fc5/FLAGba62744a2 [2021-11-07 01:32:00,676 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/data/adfe8c4f7/6fc7fd4d5f424e59875f7c5caf7e0fc5 [2021-11-07 01:32:00,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:32:00,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:32:00,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:00,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:32:00,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:32:00,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:00" (1/1) ... [2021-11-07 01:32:00,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a01e4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:00, skipping insertion in model container [2021-11-07 01:32:00,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:00" (1/1) ... [2021-11-07 01:32:00,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:32:00,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:32:01,201 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/sv-benchmarks/c/product-lines/email_spec8_product26.cil.c[14808,14821] [2021-11-07 01:32:01,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:01,449 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:32:01,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:32:01,531 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_8ef7a396-e370-4c8f-a166-abc373e5aa3d/sv-benchmarks/c/product-lines/email_spec8_product26.cil.c[14808,14821] [2021-11-07 01:32:01,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:01,643 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:32:01,695 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_8ef7a396-e370-4c8f-a166-abc373e5aa3d/sv-benchmarks/c/product-lines/email_spec8_product26.cil.c[14808,14821] [2021-11-07 01:32:01,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:01,822 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:32:01,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01 WrapperNode [2021-11-07 01:32:01,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:01,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:32:01,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:32:01,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:32:01,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01" (1/1) ... [2021-11-07 01:32:01,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01" (1/1) ... [2021-11-07 01:32:02,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:32:02,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:32:02,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:32:02,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:32:02,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01" (1/1) ... [2021-11-07 01:32:02,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01" (1/1) ... [2021-11-07 01:32:02,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01" (1/1) ... [2021-11-07 01:32:02,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01" (1/1) ... [2021-11-07 01:32:02,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01" (1/1) ... [2021-11-07 01:32:02,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01" (1/1) ... [2021-11-07 01:32:02,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01" (1/1) ... [2021-11-07 01:32:02,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:32:02,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:32:02,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:32:02,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:32:02,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01" (1/1) ... [2021-11-07 01:32:02,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:32:02,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:32:02,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:32:02,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:32:02,464 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:32:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:32:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:32:02,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:32:02,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:32:08,590 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:32:08,590 INFO L299 CfgBuilder]: Removed 725 assume(true) statements. [2021-11-07 01:32:08,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:08 BoogieIcfgContainer [2021-11-07 01:32:08,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:32:08,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:32:08,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:32:08,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:32:08,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:32:00" (1/3) ... [2021-11-07 01:32:08,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321cae08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:08, skipping insertion in model container [2021-11-07 01:32:08,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:01" (2/3) ... [2021-11-07 01:32:08,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321cae08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:08, skipping insertion in model container [2021-11-07 01:32:08,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:08" (3/3) ... [2021-11-07 01:32:08,602 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product26.cil.c [2021-11-07 01:32:08,608 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:32:08,608 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:32:08,671 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:32:08,680 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 01:32:08,680 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:32:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 1038 states, 1031 states have (on average 1.729388942774006) internal successors, (1783), 1037 states have internal predecessors, (1783), 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 01:32:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:32:08,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:08,746 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] [2021-11-07 01:32:08,746 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:08,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1931887788, now seen corresponding path program 1 times [2021-11-07 01:32:08,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:08,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136847252] [2021-11-07 01:32:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:08,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:08,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:08,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:08,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:32:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:09,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:32:09,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:09,476 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 01:32:09,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:09,592 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 01:32:09,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:09,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136847252] [2021-11-07 01:32:09,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136847252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:09,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:09,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:32:09,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231617586] [2021-11-07 01:32:09,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:32:09,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:09,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:32:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:32:09,632 INFO L87 Difference]: Start difference. First operand has 1038 states, 1031 states have (on average 1.729388942774006) internal successors, (1783), 1037 states have internal predecessors, (1783), 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 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:09,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:09,742 INFO L93 Difference]: Finished difference Result 1787 states and 3036 transitions. [2021-11-07 01:32:09,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:32:09,744 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:32:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:09,772 INFO L225 Difference]: With dead ends: 1787 [2021-11-07 01:32:09,772 INFO L226 Difference]: Without dead ends: 886 [2021-11-07 01:32:09,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 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 01:32:09,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-11-07 01:32:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 886. [2021-11-07 01:32:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 880 states have (on average 1.731818181818182) internal successors, (1524), 885 states have internal predecessors, (1524), 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 01:32:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1524 transitions. [2021-11-07 01:32:09,903 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1524 transitions. Word has length 44 [2021-11-07 01:32:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:09,904 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1524 transitions. [2021-11-07 01:32:09,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1524 transitions. [2021-11-07 01:32:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:32:09,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:09,914 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] [2021-11-07 01:32:09,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:10,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:10,130 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash 113440919, now seen corresponding path program 1 times [2021-11-07 01:32:10,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:10,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200414172] [2021-11-07 01:32:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:10,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:10,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:10,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:10,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:32:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:10,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:32:10,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:10,758 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 01:32:10,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:10,900 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 01:32:10,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:10,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200414172] [2021-11-07 01:32:10,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200414172] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:10,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:10,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:32:10,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182036668] [2021-11-07 01:32:10,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:10,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:10,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:10,907 INFO L87 Difference]: Start difference. First operand 886 states and 1524 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:11,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:11,040 INFO L93 Difference]: Finished difference Result 2628 states and 4524 transitions. [2021-11-07 01:32:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:32:11,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:32:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:11,052 INFO L225 Difference]: With dead ends: 2628 [2021-11-07 01:32:11,052 INFO L226 Difference]: Without dead ends: 1757 [2021-11-07 01:32:11,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 01:32:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-11-07 01:32:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 885. [2021-11-07 01:32:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 879 states have (on average 1.7281001137656429) internal successors, (1519), 884 states have internal predecessors, (1519), 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 01:32:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1519 transitions. [2021-11-07 01:32:11,102 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1519 transitions. Word has length 45 [2021-11-07 01:32:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:11,103 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 1519 transitions. [2021-11-07 01:32:11,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1519 transitions. [2021-11-07 01:32:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:32:11,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:11,106 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] [2021-11-07 01:32:11,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:11,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:11,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1212366589, now seen corresponding path program 1 times [2021-11-07 01:32:11,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:11,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665399220] [2021-11-07 01:32:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:11,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:11,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:11,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:11,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:32:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:11,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:32:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:11,872 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 01:32:11,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:12,012 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 01:32:12,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:12,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665399220] [2021-11-07 01:32:12,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665399220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:12,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:12,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:32:12,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652059583] [2021-11-07 01:32:12,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:12,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:12,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:12,016 INFO L87 Difference]: Start difference. First operand 885 states and 1519 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 01:32:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:12,388 INFO L93 Difference]: Finished difference Result 3457 states and 5938 transitions. [2021-11-07 01:32:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:32:12,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 47 [2021-11-07 01:32:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:12,405 INFO L225 Difference]: With dead ends: 3457 [2021-11-07 01:32:12,405 INFO L226 Difference]: Without dead ends: 2590 [2021-11-07 01:32:12,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 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 01:32:12,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-11-07 01:32:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 884. [2021-11-07 01:32:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 878 states have (on average 1.7255125284738042) internal successors, (1515), 883 states have internal predecessors, (1515), 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 01:32:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1515 transitions. [2021-11-07 01:32:12,490 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1515 transitions. Word has length 47 [2021-11-07 01:32:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:12,491 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 1515 transitions. [2021-11-07 01:32:12,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 01:32:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1515 transitions. [2021-11-07 01:32:12,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:32:12,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:12,493 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] [2021-11-07 01:32:12,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:32:12,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:12,711 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:12,712 INFO L85 PathProgramCache]: Analyzing trace with hash 300266512, now seen corresponding path program 1 times [2021-11-07 01:32:12,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:12,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086033676] [2021-11-07 01:32:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:12,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:12,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:12,715 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:12,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:32:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:13,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:32:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:13,283 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 01:32:13,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:13,411 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 01:32:13,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:13,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086033676] [2021-11-07 01:32:13,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086033676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:13,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:13,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:32:13,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108317735] [2021-11-07 01:32:13,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:13,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:13,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:13,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:13,414 INFO L87 Difference]: Start difference. First operand 884 states and 1515 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 01:32:13,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:13,518 INFO L93 Difference]: Finished difference Result 1765 states and 3027 transitions. [2021-11-07 01:32:13,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:32:13,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 48 [2021-11-07 01:32:13,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:13,525 INFO L225 Difference]: With dead ends: 1765 [2021-11-07 01:32:13,525 INFO L226 Difference]: Without dead ends: 889 [2021-11-07 01:32:13,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 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 01:32:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-11-07 01:32:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 884. [2021-11-07 01:32:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 878 states have (on average 1.7220956719817768) internal successors, (1512), 883 states have internal predecessors, (1512), 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 01:32:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1512 transitions. [2021-11-07 01:32:13,588 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1512 transitions. Word has length 48 [2021-11-07 01:32:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:13,588 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 1512 transitions. [2021-11-07 01:32:13,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 01:32:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1512 transitions. [2021-11-07 01:32:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:32:13,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:13,590 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:13,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:13,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:13,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:13,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1328180709, now seen corresponding path program 1 times [2021-11-07 01:32:13,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:13,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138018033] [2021-11-07 01:32:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:13,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:13,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:13,812 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:13,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:32:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:14,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:32:14,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:14,408 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 01:32:14,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:14,558 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 01:32:14,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:14,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138018033] [2021-11-07 01:32:14,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138018033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:14,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:14,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:32:14,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525003952] [2021-11-07 01:32:14,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:14,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:14,561 INFO L87 Difference]: Start difference. First operand 884 states and 1512 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 01:32:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:14,966 INFO L93 Difference]: Finished difference Result 3444 states and 5914 transitions. [2021-11-07 01:32:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:32:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 49 [2021-11-07 01:32:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:14,983 INFO L225 Difference]: With dead ends: 3444 [2021-11-07 01:32:14,983 INFO L226 Difference]: Without dead ends: 2586 [2021-11-07 01:32:14,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 01:32:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-11-07 01:32:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 884. [2021-11-07 01:32:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 878 states have (on average 1.7186788154897494) internal successors, (1509), 883 states have internal predecessors, (1509), 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 01:32:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1509 transitions. [2021-11-07 01:32:15,082 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1509 transitions. Word has length 49 [2021-11-07 01:32:15,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:15,082 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 1509 transitions. [2021-11-07 01:32:15,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 01:32:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1509 transitions. [2021-11-07 01:32:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:32:15,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:15,085 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] [2021-11-07 01:32:15,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:15,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:15,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash -394054560, now seen corresponding path program 1 times [2021-11-07 01:32:15,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:15,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7130872] [2021-11-07 01:32:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:15,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:15,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:15,305 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:15,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:32:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:15,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:15,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:15,917 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 01:32:15,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:16,043 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 01:32:16,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:16,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7130872] [2021-11-07 01:32:16,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7130872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:16,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:16,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:32:16,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608624369] [2021-11-07 01:32:16,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:16,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:16,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:16,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:16,046 INFO L87 Difference]: Start difference. First operand 884 states and 1509 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 01:32:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:16,220 INFO L93 Difference]: Finished difference Result 2339 states and 3985 transitions. [2021-11-07 01:32:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:32:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 51 [2021-11-07 01:32:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:16,231 INFO L225 Difference]: With dead ends: 2339 [2021-11-07 01:32:16,232 INFO L226 Difference]: Without dead ends: 1742 [2021-11-07 01:32:16,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 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 01:32:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-11-07 01:32:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1145. [2021-11-07 01:32:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1139 states have (on average 1.7462686567164178) internal successors, (1989), 1144 states have internal predecessors, (1989), 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 01:32:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1989 transitions. [2021-11-07 01:32:16,328 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1989 transitions. Word has length 51 [2021-11-07 01:32:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:16,328 INFO L470 AbstractCegarLoop]: Abstraction has 1145 states and 1989 transitions. [2021-11-07 01:32:16,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 01:32:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1989 transitions. [2021-11-07 01:32:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:32:16,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:16,331 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] [2021-11-07 01:32:16,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:16,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:16,545 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:16,546 INFO L85 PathProgramCache]: Analyzing trace with hash 135332625, now seen corresponding path program 1 times [2021-11-07 01:32:16,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:16,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513824305] [2021-11-07 01:32:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:16,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:16,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:16,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:16,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:32:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:17,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:17,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:17,176 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 01:32:17,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:17,331 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 01:32:17,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:17,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513824305] [2021-11-07 01:32:17,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513824305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:17,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:17,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:32:17,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969612934] [2021-11-07 01:32:17,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:32:17,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:17,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:32:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:17,334 INFO L87 Difference]: Start difference. First operand 1145 states and 1989 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 01:32:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:17,524 INFO L93 Difference]: Finished difference Result 3012 states and 5226 transitions. [2021-11-07 01:32:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:17,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 63 [2021-11-07 01:32:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:17,536 INFO L225 Difference]: With dead ends: 3012 [2021-11-07 01:32:17,537 INFO L226 Difference]: Without dead ends: 1951 [2021-11-07 01:32:17,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 01:32:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-11-07 01:32:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1354. [2021-11-07 01:32:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1348 states have (on average 1.7596439169139466) internal successors, (2372), 1353 states have internal predecessors, (2372), 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 01:32:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 2372 transitions. [2021-11-07 01:32:17,653 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 2372 transitions. Word has length 63 [2021-11-07 01:32:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:17,654 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 2372 transitions. [2021-11-07 01:32:17,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 01:32:17,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 2372 transitions. [2021-11-07 01:32:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:32:17,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:17,657 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] [2021-11-07 01:32:17,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:32:17,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:17,870 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:17,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:17,871 INFO L85 PathProgramCache]: Analyzing trace with hash 9772784, now seen corresponding path program 1 times [2021-11-07 01:32:17,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:17,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264413836] [2021-11-07 01:32:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:17,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:17,874 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:17,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:32:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:18,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:18,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:18,472 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 01:32:18,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:18,629 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 01:32:18,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:18,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264413836] [2021-11-07 01:32:18,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264413836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:18,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:18,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:32:18,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85886276] [2021-11-07 01:32:18,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:32:18,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:18,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:32:18,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:18,632 INFO L87 Difference]: Start difference. First operand 1354 states and 2372 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 01:32:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:18,828 INFO L93 Difference]: Finished difference Result 3671 states and 6440 transitions. [2021-11-07 01:32:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:18,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-07 01:32:18,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:18,844 INFO L225 Difference]: With dead ends: 3671 [2021-11-07 01:32:18,844 INFO L226 Difference]: Without dead ends: 2409 [2021-11-07 01:32:18,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 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 01:32:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2021-11-07 01:32:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 1812. [2021-11-07 01:32:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1806 states have (on average 1.7796234772978958) internal successors, (3214), 1811 states have internal predecessors, (3214), 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 01:32:18,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3214 transitions. [2021-11-07 01:32:18,992 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3214 transitions. Word has length 64 [2021-11-07 01:32:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:18,993 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 3214 transitions. [2021-11-07 01:32:18,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 01:32:18,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3214 transitions. [2021-11-07 01:32:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:32:18,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:18,996 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] [2021-11-07 01:32:19,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:19,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:19,212 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash 475639615, now seen corresponding path program 1 times [2021-11-07 01:32:19,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:19,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933096467] [2021-11-07 01:32:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:19,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:19,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:19,214 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:19,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:32:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:19,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:19,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:19,834 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 01:32:19,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:19,982 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 01:32:19,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:19,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933096467] [2021-11-07 01:32:19,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933096467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:19,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:19,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:32:19,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895557182] [2021-11-07 01:32:19,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:32:19,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:32:19,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:19,985 INFO L87 Difference]: Start difference. First operand 1812 states and 3214 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:20,233 INFO L93 Difference]: Finished difference Result 5025 states and 8935 transitions. [2021-11-07 01:32:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:20,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:32:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:20,255 INFO L225 Difference]: With dead ends: 5025 [2021-11-07 01:32:20,255 INFO L226 Difference]: Without dead ends: 3313 [2021-11-07 01:32:20,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 01:32:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3313 states. [2021-11-07 01:32:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 2716. [2021-11-07 01:32:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2710 states have (on average 1.799630996309963) internal successors, (4877), 2715 states have internal predecessors, (4877), 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 01:32:20,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 4877 transitions. [2021-11-07 01:32:20,484 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 4877 transitions. Word has length 65 [2021-11-07 01:32:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:20,484 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 4877 transitions. [2021-11-07 01:32:20,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 4877 transitions. [2021-11-07 01:32:20,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:32:20,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:20,489 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] [2021-11-07 01:32:20,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:20,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:20,705 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:20,706 INFO L85 PathProgramCache]: Analyzing trace with hash -731902785, now seen corresponding path program 1 times [2021-11-07 01:32:20,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:20,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183816897] [2021-11-07 01:32:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:20,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:20,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:20,708 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:20,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:32:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:21,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:21,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:21,387 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 01:32:21,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:21,552 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 01:32:21,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:21,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183816897] [2021-11-07 01:32:21,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183816897] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:21,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:21,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:32:21,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928839966] [2021-11-07 01:32:21,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:32:21,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:32:21,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:21,554 INFO L87 Difference]: Start difference. First operand 2716 states and 4877 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 01:32:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:21,887 INFO L93 Difference]: Finished difference Result 7473 states and 13443 transitions. [2021-11-07 01:32:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:21,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-07 01:32:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:21,942 INFO L225 Difference]: With dead ends: 7473 [2021-11-07 01:32:21,942 INFO L226 Difference]: Without dead ends: 4891 [2021-11-07 01:32:21,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 01:32:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-11-07 01:32:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 4294. [2021-11-07 01:32:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4288 states have (on average 1.8138992537313432) internal successors, (7778), 4293 states have internal predecessors, (7778), 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 01:32:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 7778 transitions. [2021-11-07 01:32:22,269 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 7778 transitions. Word has length 66 [2021-11-07 01:32:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:22,269 INFO L470 AbstractCegarLoop]: Abstraction has 4294 states and 7778 transitions. [2021-11-07 01:32:22,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 01:32:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 7778 transitions. [2021-11-07 01:32:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:32:22,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:22,275 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] [2021-11-07 01:32:22,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:22,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:22,490 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash 676905328, now seen corresponding path program 1 times [2021-11-07 01:32:22,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:22,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420138934] [2021-11-07 01:32:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:22,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:22,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:22,492 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:22,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:32:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:22,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:22,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:23,135 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 01:32:23,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:23,298 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 01:32:23,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:23,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420138934] [2021-11-07 01:32:23,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420138934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:23,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:23,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:32:23,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235141840] [2021-11-07 01:32:23,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:32:23,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:23,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:32:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:23,303 INFO L87 Difference]: Start difference. First operand 4294 states and 7778 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 01:32:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:23,785 INFO L93 Difference]: Finished difference Result 11923 states and 21629 transitions. [2021-11-07 01:32:23,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:23,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2021-11-07 01:32:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:23,810 INFO L225 Difference]: With dead ends: 11923 [2021-11-07 01:32:23,810 INFO L226 Difference]: Without dead ends: 7797 [2021-11-07 01:32:23,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 01:32:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7797 states. [2021-11-07 01:32:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7797 to 7200. [2021-11-07 01:32:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7194 states have (on average 1.8230469835974423) internal successors, (13115), 7199 states have internal predecessors, (13115), 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 01:32:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 13115 transitions. [2021-11-07 01:32:24,340 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 13115 transitions. Word has length 67 [2021-11-07 01:32:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:24,341 INFO L470 AbstractCegarLoop]: Abstraction has 7200 states and 13115 transitions. [2021-11-07 01:32:24,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 01:32:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 13115 transitions. [2021-11-07 01:32:24,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:32:24,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:24,357 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:24,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:24,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:24,572 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1278722608, now seen corresponding path program 1 times [2021-11-07 01:32:24,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:24,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810604970] [2021-11-07 01:32:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:24,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:24,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:24,574 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:24,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:32:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:25,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:25,348 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 01:32:25,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:25,510 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 01:32:25,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:25,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810604970] [2021-11-07 01:32:25,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810604970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:25,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:25,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:32:25,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31089137] [2021-11-07 01:32:25,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:32:25,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:25,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:32:25,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:25,512 INFO L87 Difference]: Start difference. First operand 7200 states and 13115 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:26,203 INFO L93 Difference]: Finished difference Result 20967 states and 38251 transitions. [2021-11-07 01:32:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:26,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:32:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:26,242 INFO L225 Difference]: With dead ends: 20967 [2021-11-07 01:32:26,242 INFO L226 Difference]: Without dead ends: 13943 [2021-11-07 01:32:26,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13943 states. [2021-11-07 01:32:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13943 to 13346. [2021-11-07 01:32:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13346 states, 13340 states have (on average 1.8287856071964017) internal successors, (24396), 13345 states have internal predecessors, (24396), 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 01:32:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13346 states to 13346 states and 24396 transitions. [2021-11-07 01:32:27,195 INFO L78 Accepts]: Start accepts. Automaton has 13346 states and 24396 transitions. Word has length 68 [2021-11-07 01:32:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:27,195 INFO L470 AbstractCegarLoop]: Abstraction has 13346 states and 24396 transitions. [2021-11-07 01:32:27,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 13346 states and 24396 transitions. [2021-11-07 01:32:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:32:27,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:27,203 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] [2021-11-07 01:32:27,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:27,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:27,418 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:27,419 INFO L85 PathProgramCache]: Analyzing trace with hash 584243968, now seen corresponding path program 1 times [2021-11-07 01:32:27,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:27,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093738090] [2021-11-07 01:32:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:27,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:27,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:27,422 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:27,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:32:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:28,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:32:28,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:28,425 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 01:32:28,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:28,643 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 01:32:28,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:28,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093738090] [2021-11-07 01:32:28,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093738090] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:28,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:28,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:32:28,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605485176] [2021-11-07 01:32:28,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:28,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:28,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:28,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:28,645 INFO L87 Difference]: Start difference. First operand 13346 states and 24396 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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 01:32:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:31,935 INFO L93 Difference]: Finished difference Result 33135 states and 60553 transitions. [2021-11-07 01:32:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:32:31,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:32:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:31,994 INFO L225 Difference]: With dead ends: 33135 [2021-11-07 01:32:31,994 INFO L226 Difference]: Without dead ends: 20086 [2021-11-07 01:32:32,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 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 01:32:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20086 states. [2021-11-07 01:32:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20086 to 13313. [2021-11-07 01:32:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13313 states, 13307 states have (on average 1.8234012174043737) internal successors, (24264), 13312 states have internal predecessors, (24264), 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 01:32:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13313 states to 13313 states and 24264 transitions. [2021-11-07 01:32:33,243 INFO L78 Accepts]: Start accepts. Automaton has 13313 states and 24264 transitions. Word has length 69 [2021-11-07 01:32:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:33,244 INFO L470 AbstractCegarLoop]: Abstraction has 13313 states and 24264 transitions. [2021-11-07 01:32:33,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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 01:32:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 13313 states and 24264 transitions. [2021-11-07 01:32:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:32:33,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:33,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:33,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:33,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:33,471 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:33,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:33,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1187975263, now seen corresponding path program 1 times [2021-11-07 01:32:33,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:33,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483479623] [2021-11-07 01:32:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:33,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:33,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:33,473 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:33,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:32:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:34,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:34,230 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 01:32:34,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:34,396 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 01:32:34,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:34,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483479623] [2021-11-07 01:32:34,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483479623] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:34,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:34,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:32:34,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212128697] [2021-11-07 01:32:34,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:32:34,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:34,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:32:34,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:34,399 INFO L87 Difference]: Start difference. First operand 13313 states and 24264 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:35,438 INFO L93 Difference]: Finished difference Result 39138 states and 71405 transitions. [2021-11-07 01:32:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:35,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:32:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:35,525 INFO L225 Difference]: With dead ends: 39138 [2021-11-07 01:32:35,525 INFO L226 Difference]: Without dead ends: 26008 [2021-11-07 01:32:35,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:35,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26008 states. [2021-11-07 01:32:37,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26008 to 25411. [2021-11-07 01:32:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25411 states, 25405 states have (on average 1.8255067900019681) internal successors, (46377), 25410 states have internal predecessors, (46377), 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 01:32:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25411 states to 25411 states and 46377 transitions. [2021-11-07 01:32:37,640 INFO L78 Accepts]: Start accepts. Automaton has 25411 states and 46377 transitions. Word has length 69 [2021-11-07 01:32:37,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:37,641 INFO L470 AbstractCegarLoop]: Abstraction has 25411 states and 46377 transitions. [2021-11-07 01:32:37,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 25411 states and 46377 transitions. [2021-11-07 01:32:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:32:37,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:37,650 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:37,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:37,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:37,865 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:37,865 INFO L85 PathProgramCache]: Analyzing trace with hash 34652959, now seen corresponding path program 1 times [2021-11-07 01:32:37,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:37,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830492567] [2021-11-07 01:32:37,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:37,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:37,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:37,867 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:37,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:32:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:38,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:38,672 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 01:32:38,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:38,837 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 01:32:38,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:38,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830492567] [2021-11-07 01:32:38,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830492567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:38,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:38,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:32:38,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065816198] [2021-11-07 01:32:38,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:32:38,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:38,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:32:38,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:38,840 INFO L87 Difference]: Start difference. First operand 25411 states and 46377 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:40,689 INFO L93 Difference]: Finished difference Result 70071 states and 127480 transitions. [2021-11-07 01:32:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:40,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:32:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:40,846 INFO L225 Difference]: With dead ends: 70071 [2021-11-07 01:32:40,846 INFO L226 Difference]: Without dead ends: 44890 [2021-11-07 01:32:40,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:32:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44890 states. [2021-11-07 01:32:43,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44890 to 44293. [2021-11-07 01:32:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44293 states, 44287 states have (on average 1.8145731252963624) internal successors, (80362), 44292 states have internal predecessors, (80362), 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 01:32:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44293 states to 44293 states and 80362 transitions. [2021-11-07 01:32:43,761 INFO L78 Accepts]: Start accepts. Automaton has 44293 states and 80362 transitions. Word has length 70 [2021-11-07 01:32:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:43,761 INFO L470 AbstractCegarLoop]: Abstraction has 44293 states and 80362 transitions. [2021-11-07 01:32:43,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 44293 states and 80362 transitions. [2021-11-07 01:32:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:32:43,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:43,772 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] [2021-11-07 01:32:43,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:43,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:43,993 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:43,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:43,994 INFO L85 PathProgramCache]: Analyzing trace with hash 91591622, now seen corresponding path program 1 times [2021-11-07 01:32:43,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:43,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639308921] [2021-11-07 01:32:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:43,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:43,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:43,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:43,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:32:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:44,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:32:44,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:44,830 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 01:32:44,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:45,056 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 01:32:45,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:45,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639308921] [2021-11-07 01:32:45,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639308921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:45,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:45,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:32:45,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294806871] [2021-11-07 01:32:45,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:45,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:45,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:45,059 INFO L87 Difference]: Start difference. First operand 44293 states and 80362 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:52,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:52,677 INFO L93 Difference]: Finished difference Result 172440 states and 312749 transitions. [2021-11-07 01:32:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:32:52,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:32:52,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:53,201 INFO L225 Difference]: With dead ends: 172440 [2021-11-07 01:32:53,202 INFO L226 Difference]: Without dead ends: 128443 [2021-11-07 01:32:53,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:32:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128443 states. [2021-11-07 01:32:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128443 to 44035. [2021-11-07 01:32:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44035 states, 44029 states have (on average 1.8017670171932136) internal successors, (79330), 44034 states have internal predecessors, (79330), 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 01:32:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44035 states to 44035 states and 79330 transitions. [2021-11-07 01:32:56,546 INFO L78 Accepts]: Start accepts. Automaton has 44035 states and 79330 transitions. Word has length 71 [2021-11-07 01:32:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:56,546 INFO L470 AbstractCegarLoop]: Abstraction has 44035 states and 79330 transitions. [2021-11-07 01:32:56,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand 44035 states and 79330 transitions. [2021-11-07 01:32:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:32:56,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:56,554 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] [2021-11-07 01:32:56,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:56,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:56,757 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:32:56,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:56,758 INFO L85 PathProgramCache]: Analyzing trace with hash -235771804, now seen corresponding path program 1 times [2021-11-07 01:32:56,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:56,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658454258] [2021-11-07 01:32:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:56,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:56,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:56,759 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:56,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:32:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:57,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:57,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:57,576 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 01:32:57,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:57,754 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 01:32:57,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:57,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658454258] [2021-11-07 01:32:57,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658454258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:57,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:57,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:32:57,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432436156] [2021-11-07 01:32:57,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:57,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:57,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:57,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:57,756 INFO L87 Difference]: Start difference. First operand 44035 states and 79330 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 01:33:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:00,054 INFO L93 Difference]: Finished difference Result 88365 states and 159148 transitions. [2021-11-07 01:33:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:00,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 71 [2021-11-07 01:33:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:00,139 INFO L225 Difference]: With dead ends: 88365 [2021-11-07 01:33:00,140 INFO L226 Difference]: Without dead ends: 44632 [2021-11-07 01:33:00,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 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 01:33:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44632 states. [2021-11-07 01:33:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44632 to 44035. [2021-11-07 01:33:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44035 states, 44029 states have (on average 1.7988598423766153) internal successors, (79202), 44034 states have internal predecessors, (79202), 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 01:33:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44035 states to 44035 states and 79202 transitions. [2021-11-07 01:33:02,510 INFO L78 Accepts]: Start accepts. Automaton has 44035 states and 79202 transitions. Word has length 71 [2021-11-07 01:33:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:02,510 INFO L470 AbstractCegarLoop]: Abstraction has 44035 states and 79202 transitions. [2021-11-07 01:33:02,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 01:33:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 44035 states and 79202 transitions. [2021-11-07 01:33:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:33:02,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:02,520 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 01:33:02,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:02,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:02,736 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:33:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:02,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2126228655, now seen corresponding path program 1 times [2021-11-07 01:33:02,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:02,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855015964] [2021-11-07 01:33:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:02,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:02,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:02,738 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:02,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef7a396-e370-4c8f-a166-abc373e5aa3d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:33:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:03,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:03,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:03,667 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 01:33:03,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:03,882 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 01:33:03,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:03,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855015964] [2021-11-07 01:33:03,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855015964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:03,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:03,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:03,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99815907] [2021-11-07 01:33:03,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:03,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:03,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:03,887 INFO L87 Difference]: Start difference. First operand 44035 states and 79202 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)